Slewing Ring - IMO

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DV 311 USwww.goimo.com

IMO Anlagenbau offers future-oriented products and solutions in themachine and plant manufacturing sector as well as environmental technology.In addition to standard machines and special machines, the company‘sactivities include development and implementation of solar tracking systems,as well as solar home systems. The IMO Anlagenbau experts also offerconsulting support and take charge of turn-key projects.

IMO Antriebseinheit is specialized in developing and manufacturingpinion or worm driven Slew Drives. These patented componentsystems are used for example in manlift platforms, steering gears,construction machinery and solar trackers.

IMO Energy is one of the leading suppliers of yaw and blade bearingsfor onshore and offshore wind turbines. Slewing Rings manufacturedby IMO Energy are also used as single main bearing for gear- and shaftlesswind turbines and as blade bearing for tidal stream systems.

IMO Momentenlager is developing, manufacturing and supplying Balland Roller Slewing Rings up to a diameter of 5,200 mm / 204.724 inin a wide range of products. They are used for instance in the followingapplications: special purpose machinery, construction machinery, cranes andmanlift platforms, tunnel boring machines, ship building, medical technologyand bulk handling.

IMO Holding acts as service provider for the other companies of theIMO Group. IMO Holding comprises the central departments of the Groupsuch as quality assurance, finance, human resource, IT and marketing.

Nomenclature

Slewing Ring design1:2:3:4:5:6:7:8:9:0:

1 2 – 60 5012 / 2 – 01234

Drawing reference number

Gearing heat treatment1:2:3:4:5-9:0:

For Slewing Rings: Raceway diameter [inches]For gear rims and pinions: Pitch circle diameter [inches]For rings: Outside diameter [inches]

For Slewing Rings: Rolling element diameter [inches]For gear rims and pinions: Module [inches]

NormalizedQuenched and temperedTooth flanks surface hardenedTooth flanks and roots surface hardenedIdentification for special designsUntoothed

Gear type:1:2:3-9:0:

External toothedInternal toothedIdentification for special designsUntoothed

Single Row Ball Slewing RingCross Roller Slewing RingTriple Row Roller Slewing RingDouble Row Ball Slewing RingRoller / Ball Combination Slewing RingGear rim / pinion / ringWire race bearing / fitting elementDouble Axial Slewing RingBall Slewing Ring with flange ringSpecial Slewing Ring

Preface and Imprint

IMO has developed, designed, manufactured andsold large diameter anti-friction bearings globallyfor many years. Our current range of products upto a diameter of 5,200 mm (204 in) is presentedin this catalog. Special designs are also available,please contact our Engineering Department forassistance (the contact details are on the back ofthe catalog).

In this catalog we provide you with comprehensiveinformation about our standard range of Ball andRoller Slewing Rings. The catalog has a referencenumber on the front cover. Please always checkthis is the latest edition before using the informationcontained within it.

You will find the “Application Data Sheet” on pages60/61 in this catalog. If you require assistance withany Slewing Ring application, please fill in this form.This gives us an overview of the application andrepresents a record of your requirements.

Slewing Rings are safety critical products. They haveto meet your requirements exactly and perform inthe environmental conditions of your application.Therefore, it is important to fill in the formcompletely, with as much details as possible andsend it to us. You will then receive ourrecommendation for the right IMO product for yourapplication and gain the benefit of years ofexperience meeting challenging customerrequirements and operating conditions! If theapplication data sheet has already been removedwe will be pleased to send you another one. Theapplication data sheet can also be downloadedfrom our homepage www.goimo.com.

You can find information on our Slew Drive productline in the Slew Drive catalog ST105E and ST205US,which we will send you on request. Further detailsof our company, products, their application andutilization can be found in our detailed companybrochure IM104E.

IMO terms and conditions shall apply to allquotations and purchase orders. Further we wouldlike to ask you to follow closely our Installation andOperating Manuals which contain important data.You can find these on our homepage.

The observance of our Installation and OperatingManuals is important for the reliability and safetyof our product and has a great influence on theservice life. The Installation and Operating Manualscontain practical information to help you with thedesign of your mounting structure.

All the information in this catalog has been carefullyevaluated and checked.We cannot accept responsibility for omissions anderrors in this publication.

Published by:

IMO Holding GmbHImostrasse 191350 GremsdorfGermanyTel: +49 9193 6395-0Fax: +49 9193 [email protected]

Copyright © December 2010by IMO Holding GmbH, Gremsdorf

No part of this catalog maybe reproduced without thewritten permission of thepublisher. All rightsreserved.

Registered in the U.S. Patent andTrademark Office (USA)

®

Technical solutions made by IMO may be coveredby several intellectual property rights. Some of ourcurrently patented item(s) or pending patentapplication(s) are revealed by:

US-Patent 5,834,662

Patent pending US 11/991,348Patent pending US 11/635,140Patent pending US 12/312,057Patent pending US 11/921,710

Our product range, designs and intellectual propertyrights are being continually updated and revised.

Please contact us for the latest information!

IMO USA Corp.101 Innovation DriveMc Queen ParkSummerville, SC 29483Tel. +1 843 [email protected]

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The IMO Group in the metropolitanregion of Nuremberg with head-quarters located in Gremsdorf hasmore than 20 years of experiencein designing and manufacturingSlewing Rings and Slew Drives. Fu-ture-oriented technologies and so-lutions in the machine and plantmanufacturing sector complementthe portfolio.

Our headquarters in Germany arecertified according to the standardsDIN EN ISO 9001, 14001 andOHSAS 18001.Several times, IMO has achievedawards for its product innovationsat Exhibitions for Ideas-Invention-New Products and has also earnedseveral awards for its exceptionalgrowth. In our sector we are one ofthe leading suppliers. We export ourproducts worldwide.

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P. 4 - 37ProductInformation

P. 38 - 490,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0

0102030405060708090

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Diagramm

TechnicalInformation

P. 50 - 51

Ball Slewing Ringswith flange rings

Series 920

P. 52 - 59

Single Row BallSlewing Rings

Series116, 120, 125, 150

P. 60 - 61

ApplicationData Sheet -Slewing Rings

Table of Contents

Fax

Fax

Fax

Fax

Type of load:

“Compressive”axial load

“Suspended”axial load

Ambient temperature:

Do shocks or vibrations occur?

Special seals required?

Works Certificate?

No

No

No

minimum °F

4

from 51 to 65

Product Line Overview / Comparison

Design types Series Raceway diameters Maximum tangentialtooth force 1)

[inch]DL

[lbs x 1000]

Single Row BallSlewing Rings

fz max

from 6 to 9

from 15 to 19

from 3.6 to 4.2

from 6 to 9

from 12 to 19

1) The data refers to the minimum and maximum diameter per series

from 70.87 to 110.24

from 17.91 to 57.28

from 12.24 to 42.95

from 3.94 to 19.69

from 37.60 to 57.28

from 12.24 to 42.95

Series 150

Series 125

Series 120

Series 116

Series 932*)

Series 920

Ball Slewing Ringswith flange rings

Typical applications:Simple turntables, slewingmechanisms, bogies, light cranesand construction machinery.

Typical applications:Turntables, slewing mechanisms,bogies, light to medium-sizedcranes and constructionmachinery, winders,wind energy turbines, handlingequipment.

*) This series is not part of the catalog. For details about this series please have a look at www.goimo.com or contact our US office.

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from 2110 to 5169 from 1894 to 2945 from 708 to 1101 from 1680 to 2657

Static axial load rating Static radial load rating

Weight 1)Load carrying capacity 1) ClearanceMaximum tiltingmoment 1) 2)

[ft-lbs x 1000] [lbs x 1000] [lbs x 1000] [lbs]

Radial clearance0 - 7.87

Axial tilting clearance0 - 15.75



Precision versionup to max. 1.18 mm



Precision versionup to max. 2.36





Mk max C0 ax C0 rad G






2) The tilting moment capacity for each unit should be confirmed by referring to the limiting load diagram for each individual model



Precision versionup to max. 2.36

[milli inch]

6


[inch]DL

[lbs x 1000]

Roller / Ball CombinationSlewing Rings

fz max

from 69 to 92

from 91 to 111

from 66 to 66

from 101 to 101


from 167.32 to 192.91

from 139.76 to 167.32

from 100.75 to 162.99

from 86.57 to 129.92

Double AxialSlewing Rings

Series 540*)

Series 532*)

Series 850*)

Series 840*)



Typical applications: Turntables, slewingmechanisms, bogies, winders,

Typical applications:Reclaimers, stackers and otherequipment for bulk materialshandling, turntables.

medium-sized to large cranes and constructionmachinery. Applications such as for Single RowBall Slewing Rings with higher axial load.

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Axial clearance0 - 19.69















[milli inch]

8


from 2 to 46

[inch]DL

[lbs x 1000]

Triple Row RollerSlewing Rings

fz max

from 42 to 72

from 69 to 101

from 90 to 126

from 118 to 166

from 171 to 184

Series 350*)

Series 340*)

Series 332*)

Series 325*)

Series 320*)


from 4.72 to 72.64

from 124.02 to 187.01

from 110.24 to 177.17

from 88.19 to 157.48

from 70.87 to 110.24

from 49.21 to 78.74

Other StandardBall Slewing Rings


Typical applications:Heavy harbour cranes,shipboard cranes, ladle turretsand grab cranes, radarantennas, wind energy turbinemain bearings, tunnel boringmachines and loading buoys(oil, gas swivels), machine tools(in general where theapplication requires high dutycycles).


Typical applications: Turntables, slewing mechanisms,bogies, light to medium-sized cranes,construction machinery, wind energyturbines and winders (applicationssuch as double axial Slewing Ringswith increased radial load).

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Radial clearancemax. 15.75

Axial clearancemax. 5.12







Radial clearanceacc. to version

Axial clearanceacc. to version












[milli inch]

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Replaces traditional systems using fixed andfloating bearings as well as king pinsBall and Roller Type Slewing Ring configurationsAvailable in diameters from 100 to 5,200 mm(3.937 to 204.724 in)Integrated mounting holesAvailable with integral internal or external gearingof bearing rings (module 1 to 30 mm /25,4 to 0,846 1/in)Sealed raceway system with grease lubricationStandard series and special designsCertified to meet EN 10204 requirements formaterials, dimensions and operating specifications

Large-diameter anti-friction Slewing Rings designedto handle simultaneously occuring axial, radial andmoment loads.

A comparison of the Slewing Rings:On the left are the smallest(internal diameter 40 mm / 1.575 in)and the largest (outside diameter5,200 mm / 204.724 in)IMO Slewing Rings.Below is the smallest racewayroller which we use(diameter 12 mm / 0.472 in)and the largest ball(diameter 70 mm / 2.756 in).

“Diameters up to 5,200 mm / 204.724 in -we supply XXL Slewing Rings!”.

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Serv

ices

Exp

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Serv

ice

IMO is able to offer you a unique service on the market:Depending on the size and features of the Slewing Ringwe are able to manufacture and deliver urgently neededspare parts or prototypes in only a few weeks whetherstandard or special designs.

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in only a few weeks!in only a few weeks!

“IMO cannot perform miracles, but we will do our utmost tomeet what others describe as ’impossible’ delivery requirements.IMO”s Express Service has already met the emergency needs ofmany customers. Try us!“

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Ball Slewing Rings with flange rings

Roller / Ball Combination Slewing Rings

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Single row design with four-point raceway geometry

Untoothed rings with flange thicknesses of 12 and 21 mm /0.472 and 0.827 in

Ball diameters 20 and 32 mm / 0.788 and 1.260 in

Available ex stock or with a short delivery time as standard seriesin 14 sizes

Raceway diameters of 311 to 1,091 mm or 955 to 1,455 mm /12.244 to 42.953 in or 37.598 to 57.283 in

For applications with light loads

Enables lightweight structures in spite of large bearing diameters

Applications: Handling technology, manlift platforms, turntables

Roller raceway to take up the axial loads

Ball raceway provides support for radial loads. All parts areretained together as a unit during fitting

Ball diameters 25 to 70 mm / 0.984 to 2.756 in, rollerdiameters up to 100 mm / 3.937 in

Used in applications with a dominant axial force and lowradial load / tilting moments

Standard series with outside diameters up to 5,176 mm /203.780 in

Frequently produced as special designs according to customerrequirements

Typical applications: Bulk materials handling, stacker reclaimers,bucket wheel excavators, machine tools

Ball Slewing Rings

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Single row (picture above) and double row (picture below) designs

Ball diameters 12 to 70 mm / 0.472 to 2.756 in

Four-point raceway geometry

Optional preloaded raceway system and centerings

Enables robust designs for arduous application conditions

High resistance to 'false brinelling' in heavy vibration conditions

Reduced sensitivity to shape deformations in the mountingstructure

Higher static load capacity than similar design CrossRoller Slewing Rings

Catalog series with outside diameters from 180to 2,971 mm / 7.087 to 116.968 in

Often designed as special versions according to customerrequirements (outside diameters up to 5,200 mm / 204.724 in)

Frequently used in wind energy turbines, cranes,construction machinery, mechanical engineeringand special purpose machinery

Cross Roller Slewing Rings

Double Axial Slewing Rings

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Double row design with large supporting balls and smaller retaining balls

Ball diameters 20 to 70 mm / 0.787 to 2.756 in

Both raceways in two point geometry

Frequently replaced by double row Ball Slewing Rings in new designs

Standard series with outside diameters up to 5,200 mm / 204.724 in

Used in cranes and as replacement parts for existing equipment

Special designs can be supplied

Single row roller raceway under 45 degrees

Roller diameters 12 to 60 mm / 0.472 to 2.362 in

Alternately arranged rolling elements

Constant friction torque with different loads

Higher dynamic service life than similar Ball Slewing Ring designs

Higher demands on the rigidity and precision of the mounting structure in comparison with Ball Slewing Rings

Applications: Robots, antennas, medical technology, positioning devices, machine tools

Can be supplied to special customer requirements

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Roller Slewing Rings

Triple Row Roller Slewing Rings

Roller diameters 10 to 100 mm / 0.393 to 3.937 in

Plastic, steel or brass cage segments according to loads(can also be supplied with closed cage)

Designed to provide the combination of the highest capacity in the smallest configuration

Greater static and dynamic load capacity, higher rigidity and constant friction torquecompared with all other Slewing Ring designs (with the same raceway diameter)

High requirements on the rigidity and precision of the mounting structure

Standard series with outside diameters from 1,462 to 5,179 mm / 57.559 to 203.897 in

Mostly supplied as customer specific designs

Surface coating

Depending on the requirementsof the application, the surfacesof our Slewing Rings can beprovided with metallic and non-metallic coatings, which ensureeffective corrosion protection.

ZnFeCo coating, dark-coloured,according to MIL specification

ZnFe coating

Gearing

We supply Slewing Rings with internal, external, straight and helical gears, (in various heattreated conditions) as well as untoothed Slewing Rings. The point of maximum runout of thegearing at which the circumferential backlash of the pinion should be adjusted, is marked ingreen.

External straight gear, quenched and temperedExternal helical gear,normalized

We supply modules from 1 to 30 mm /Pd from 25.4 to 0.846 1/in

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(pictured: Modules 3 mm and 20 mm /Pd 8.47 and 1.27 1/in )

Priming and multi-coat painting Zinc-coated surface (flame-sprayed)

Metal zinc spraying (flame spraying) on sand-blasted surface

Quenched and tempered ring, inductionhardened wear resistant tooth flanks

Hardened tooth flanks and roots Hardened tooth flanks androots in only one segment

Teeth in only one segmentExternal toothed Slewing Ring, quenched and tempered rings,raceway 3,000 mm, module 20 mm / 118.11 in, Pd 1.27 1/in

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Special Slewing Rings withceramic balls (dry running),stainless steel rings, square-sectioned raceway (low frictiontorque) and labyrinth seal.

Ceramic and steel balls

Series 920 Slewing Rings, butwith stainless steel rings androllers

NBR70 seal fixed withstainless steel wire

Steel plate as primary seal

Special materials

Seals

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Plastic cage for highcircumferential speeds

Plastic spacers for low circumferentialspeeds

Rolling element guided brass rollercage made for horizontal axis rotation

Untoothed Roller / Ball Combination Slewing Ring, outside diameter 4,300 mm / 169.291 in

Rolling element separation

Brass cage for Ball Slewing Ring withlonger service life and higher rotationalspeed requirements

Steel cage segments for acrane Slewing Ring

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Eccentric bearing unit from a machine tool used for diesel engine crankshaft machining. The bearing unitcontains two high precision Cross Roller raceways and one slide bearing. The integrated toothing makes itpossible to adjust the eccentricity allowing machining of all crankshaft bearing surfaces in just one operation.The unit has an external diameter of around 1,200 mm / 47.244 in. Completely manufactured by IMO!

Other special designs

“We show what is possible!”

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Slewing Rings matched to customer requirements, e.g. custom mounting hole patterns or prototype designsGeometry of the Slewing Ring adapted to the installation conditionsSuitable for extreme temperatures and vacuumsSpecial cages for high circumferential speedsSpecial sealing systems for specific applicationsSpecial lubrication according to customer requirementsRings made of special materials

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IMO: “Engineering at its best!”

Imagine you require a special Slewing Ringthat does not show any linear expansionwith temperature increase and no shrinkageas it cools. Do you think this is impossible?Are you sure?

Customer specific wire race bearing withrings manufacured from a high nickel richmaterial with a thermal expansion coefficientof practically zero. Such a bearing wasdeveloped and manufactured by IMO!

Split Slewing Rings are ideal for situations where abearing has to be fitted around an existing structure, orwhere complete dismantling of a machine would beuneconomic. Typical applications are stone compactors,tool magazines and yaw bearings of clarification plants.

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We manufacture gear rims up to outsidediameters of 5,250 mm / 206.692 inand module 30 mm / Pd 0.846 1/in.

Double Row Angular Contact CylindricalRoller Slewing Ring for the chain wheel ofa tracklaying vehicle. These separable ringsare not self-supporting but integrated intothe housing as individual parts by thecustomer.

We supply customer specific pinionsfrom 12 mm module / Pd 2.12 1/in

Finish turned and bored mountingflanges and supporting ringscomplete our production lines.

180 deg gear ringsegments, 5 degright-hand helicalgearing

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“We also supply complete solutions!”

Our pinion and worm driven Slew Drives are ready to installsystem modules consisting of:

A Ball or Roller Slewing Ring Hydraulic or electric motors (direct drive or with gearbox) A totally enclosed housing Attachments on request (brakes, position feedback sensors)

Bolt on the Slew Drive, connect the motorand start slewing - as simple as that!

IMO's innovative Slew Drives have a lot to offer…

No adjusting of components Complete system instead of many single parts Compact design High output torques thanks to the high gear ratio

… and are used in many applications such as steering gear in special vehicles, hingesin manlift platforms, in cranes and in attachments for stackers and excavators.

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You can find our complete standard lines in our ProductCatalog ST 305 US. We also supply customized designs.Request a copy of the catalog straight away by e-mail:[email protected].

IMO Slewing Rings - approved foruse in arctic conditions (operationdown to -22°F, proof of structuralintegrity under load at -40°F)

Offshore - the future!

The nacelle with Yaw Bearingalready attached, is loweredonto the turbine tower.

Single Row Ball Slewing Ring, with internalteeth, zinc coated surface (flame-sprayed) andpainted. Used on top of the turbine tower asa Yaw Bearing to allow the nacelle and rotorto orientate into wind.

Double Row untoothed Ball Slewing Ring,with cage and special seals, zinc- coatedsurfaces (flame-sprayed) and painted.Such Slewing Rings are used to adjustthe rotor blades (three per wind turbine).

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Slewing Ring in delivery condition, unpacked:Raceway soft spots marked with “S”, nameplatein the vicinity of the filling plug (here withcustomer specific barcode).

Tidal EnergyIMO blade bearings are used in tidalstream systems in a water depth of20 m / 65.616 ft.

Courtesy of Marine Current Turbines Ltd.

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A wind energy turbine with a rotor diameter of 82 m / 269 ft anda power of 1.65 MW. This turbine can provide electric power for1,200 homes. IMO develops Slewing Rings for such wind energyturbines with the latest equipment according to recognized procedures.The calculation is carried out according to the relevant regulationsfrom Germanischer Lloyd, the DNV and other well-known certifyingauthorities.

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Shipboard cranes

Harbour cranes, mobile harbour cranes

Railway slewing cranes

Manlift platforms, mobile cranes

Specifications:

Outside diameter 5,000 mm / 196.85 in Support roller diameter 50 mm / 1.968 in Maximum permissible tilting moment 65,000 kNm / 47941400 ft-lbs Module 24 mm / 0.945 in Weight 8,500 kg / 18739.1 lbs

26 27

Triple Row Roller Slewing Ring with an outsidediameter of about 5,000 mm / 196.85 in and rootand flank hardened internal toothing. This SlewingRing for an Indonesian harbour pontoon crane wasmanufactured and shipped by IMO in only 8 weeks.

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Special Slewing Rings (wire race bearing) with stainlesssteel rings for a slip ring assembly on an FPSO. Ahighly accurate and very narrow bearing gap ensuresthe necessary EExd - explosion pressure protection.In the case of an explosion on the upper side of thewire race bearing there must be no possibility ofignition sparks penetrating through the bearing andcausing a secondary detonation on the lower side.

Ball Slewing Ring with root and flank hardened external toothing for a ship`s thruster on avessel. The stamp by Lloyd's Register of Shipping can be clearly seen. With our partners weare able to fulfill the specifications of all leading certifying authorities.

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FPSOs (Floating Production Storage Offloading) areoil processing ships which pump crude oil from thebottom of the sea by injecting high-pressure media.The ship 'weather vanes' around a swivelincorporating a Triple Row Roller Slewing Ring.

Slewing Rings for offshore applications are always subject to special approval requirements fromthe respective certifying authority. The rolled rings must demonstrate a notched bar impact strengthof an average of 42 J at -4°F.

The picture below shows the final assembly of an internal toothed Triple Row Roller Slewing Ringfor a large offshore crane. 29

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This stacker on board of a ship is swivelled bymeans of an internal toothed Triple Row RollerSlewing Ring.

Specification: Outside diameter 3,250 mm / 127.952 in Maximum tilting moment 13,000 kNm / 9588290 ft-lbs

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Bulk materials handling in the harbour is carried out by stackersand reclaimers, which are equipped with external toothed,

Roller / Ball Combination Slewing Rings with raceways in a diameterrange of 4 to 5 m / 13.123 to 16.404 ft.

Specification: Stacker reclaimer with 80 m / 262.464 ft boom Outside diameter 4,300 mm / 169.291 in Roller diameter 40 mm / 1.575 in, ball diameter 32 mm / 1.260 in Maximum axial force 4,000 kN / 899236 lbs Maximum swivelling moment 6,000 kNm / 4425360 ft-lbs

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The erector uses a Cross Roller Slewing Ringfor lifting and positioning the concrete lining

segments (Tubbing) which are used forstrengthening the tunnel walls.

Tunnel boring machines use large and heavy Triple RowRoller Slewing Rings in cutting heads.

Triple Row Roller Slewing Ring for a microtunnel boring machine.

Specification: Raceway diameter 4,500 mm / 177.165 in Outside diameter 4,700 mm / 185.039 in Roller diameter 40 mm / 1.575 in Double lip seals with primary labyrinth

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We manufacture Triple Row Roller Slewing Rings for cover swing gears ofelectric arc furnaces (so-called EAFs, picture above) as well as Triple Row

Roller Slewing Rings for ladle turrets (picture below).

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The Ball Slewing Ring shown has special sealsand compensates for the relative rotationalmovements of the split rollers (the actual rollers).

Tandem asphalt compaction rollers use untoothedSlewing Rings as steering bearings, which arecoated to prevent corrosion.

Ball Slewing Rings witha horizontal rotating axis

are used in the knucklejoint of the refuse

compactor.

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Precision Single Row Ball Slewing Rings with cages are used for the rotatingcarousels in fast running blow moulders for the production of polyethelenePET bottles. Such Slewing Rings run continuously and reliable service life is anessential design criterion.

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Linear accelerators are used in oncology for radiation therapies.The Ball Slewing Rings with horizontal rotational axes have tobe highly precise with a minimum of running noise and frictiontorque.

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yVariable winding and unwinding systems

in printing machines require highprecision. Smooth running Cross Roller

Slewing Rings fulfill all requiredcriterion and are perfectly adaptable forthis application. In this picture you cansee a Cross Roller Slewing Ring, partlyassembled with a raceway diameter ofapproximately 1,300 mm / 51.181 in.

In Cross Roller Slewing Rings, the rollersare arranged crosswise and run in a square

sectioned raceway.

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Cax

CaxT

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Fax

FaxD

Frad

FradD

FradZ

Frad max

Fsp

Fz

fz norm

fz max

G

Technical Information

Basic axial dynamic load rating

Basic axial dynamic load rating,supporting raceway

Basic axial dynamic load rating,retaining raceway

Basic radial dynamic load rating

Basic axial static load rating

Basic axial static load rating,supporting raceway

Basic axial static load rating,retaining raceway

Basic radial static load rating

Outside diameter, inner ring

Raceway diameter of rolling elements(see Product Overview)

Diameter of rolling elements

Application service factor

Axial force including all occurring shock loads andrequired safety factors, calculated from all axialforces

Equivalent axial force including application servicefactor for determining the load point in the limitingload diagram

Radial force including all occurring shock loadsand required safety factors, calculated from allradial forces

Equivalent radial force for determining of MkD

Radial force from gearing circumferential force

Limit value for checking frictional contact

Initial preload on bolt

Operating gearing circumferential force

Permissible gearing circumferential force for toothbase fatigue strength

Maximum permissible gearing circumferential forceagainst overload fracture

Mass (weight)

Symbols and units

lbs

lbs

lbs

lbs

lbs

lbs

lbs

lbs

inch

inch

inch

—

lbs

lbs

lbs

lbs

lbs

lbs

lbs

lbs

lbs

lbs

lb

H

i

Pd

m

Mk

MkD

MW

MWA

n

nb

nmax

nperm

S0

S0rad

SF

x1

x2

z1

z2

αA

δf

δk

δk perm

δp

δv

δw

Md

Overall height of Slewing Ring

Gear ratio

Diametral Pitch

Module

Tilting moment, including all occurring impactloads and required safety factors, calculated fromall axial and radial forces that cause the tiltingeffect

Equivalent tilting moment for determining theload point in the limiting load diagram

Friction torque of the Slewing Ring underoperating load in the installed state

Friction torque of the Slewing Ring, unloaded

Rotational speed of Slewing Ring

Number of mounting holes per bearing ring

Maximum rotational speed of Slewing Ring

Permissible rotational speed of Slewing Ring

Required static raceway safety

Existing static safety of radial raceway

Safety factor against tooth base fracture

Pinion addendum modification coefficient

Slewing Ring addendum modification coefficient

Number of pinion teeth

Number of Slewing Ring teeth (wheel)

Bolt tightening factor

Circumferential backlash of gearing

Tilting clearance increase

Maximum permissible tilting clearance increase

Maximum permissible flatness deviation

Maximum permissible deformation of mountingstructure

Maximum permissible perpendicularity deviation

Gear torque at slewing ring

inch

—

1/inch

mm

ft-lbs

ft-lbs

ft-lbs

ft-lbs

rpm

—

rpm

rpm

—

—

—

—

—

—

—

—

inch

inch

inch

inch

inch

inch

ft-lbs

39

Function

Construction and function of a Slewing Ring

Slewing Rings consist of an internal (1) and external ring (2) andwith an integrated raceway system and optional internal or externaltoothing (3). A functional seal (4) protects the raceway system onthe upper and lower sides. Slewing Rings are designed for greaselubrication which is carried out via grease nipples (5).

In Slewing Rings, the rolling elements (6) carry the loads betweenthe inner and outer ring. The load capacity of the raceway systemis determined predominantly by the raceway design, the hardeningdepth, and the number and size of the rolling elements. Spacers (7)separate the rolling elements and minimise friction and wear. Therolling elements are inserted during manufacture through the fillingplug hole (8), retained by the filling plug which is then secured bya pin (9). The force is transmitted to the mounting structure by bolts.Through holes or threaded holes (10) can be provided in the innerand outer rings for these bolts.

Fax

Frad

MK

Figure 2

2

67

Load distributionDepending on external load, the load distribution and the contactangle around the rolling elements will vary.

In the case of axial load, all rolling elements are loaded in the samedirectionIn the case of radial load, a segment of the rolling elements carriesthe loadIn the case of tilting moment load, a segment on one side and asegment on the opposite side of the raceway carry the loadMostly, a combination of axial, radial and tilting moment loadsoccur (Fig. 2).

•

•

•

•

Figure 1

3

1

5

4

8

9

10


40

Radial loads must be transmitted by means of frictional contactbetween Slewing Ring and the attached mounting structure.

A good bolt connection is vital for satisfactory function of theSlewing Ring.

The bolt connection and tilting clearance of the Slewing Ring mustbe checked regularly.

•

•

•

Axial loads can be either “compressive” or “suspended”.

“Suspended” axial loads and the load on a rising segment in tiltingmoments must be adequately resisted by mounting bolts (Fig. 3).Note: Catalog bolt data is not valid in this case!

•

•

GearOur standard Slewing Rings are designed with spur gears.Permissible torques are specified in the Slewing Ring tables.

SealingPolymer seals protect the Slewing Rings from normal dirt penetration,dust and light sprayed water. For very dirty and wet environments,the seals shall be protected by pre-mounted labyrinth or additionalseals on the mounting structure. Performance and service life of theSlewing Ring depends strongly on preventing ingress of contaminentsinto the Slewing Ring.

Pressure washing must not be used to clean Slewing Rings.

Operating temperatureStandard IMO Slewing Rings can be used in ambient temperaturesfrom -13°F up to 158°F. Please contact us in the case of higher orlower operating temperatures.

All catalog bolt data is valid only for “compressive” loads asshown in Figure 4

“Compressive” loads

“Suspended” loads

Figure 3

Figure 4

Fax

Fax

Fax

Fax

Selection criteria

The following criteria must be considered for the correct selectionof a Slewing Ring.

Direction of rotational axisVertical: Slewing Rings of all series can be used.

Slewing Rings of all series can be used. The permissiblerotational speed has to be limited to half of the valueof the vertical rotational speed.

Here the same conditions apply as for a horizontalrotational axis.

Horizontal:

Alternating:

LoadsExternal forces such as axial loads, radial loads and tilting momentmust lie below the static limiting load curve, as regards their operatingload point. For this, please refer to the chapters “Static capacity ofraceway” and “Mounting bolts”.

Shocks, vibrationsTo account for the peculiarities of the different applications theshock factors for gears and the raceway system should be considered.

Torque / tooth forcesThe required torque must not exceed the maximum permissibletorques and tooth forces given in the Technical Information section.Explanations of the different torque specifications can be found inthe gear section on page 43.

Rotational speedThe following is a list of the maximum permissible rotational speedsnperm for the different series:

Lower permissible values apply for Slewing Rings in precision designsor those with reduced clearance. Please contact our EngineeringDepartment for assistance.

Series 116 Slewing Rings:

Series 120, 125, 150 and 920Slewing Rings:

With horizontal axis of rotation: 800da

nperm =

1600da

nperm =

3200da

nperm =

nperm

dain [rpm]in [in]

41

Duty

For continuous running or high duty applications it is essential tocheck the service life of the Slewing Ring and, if necessary, thegearing. Please contact our Engineering Department for assistance.

Static load capacity of raceway

Static load capacity of the Slewing Ring is determined by:

• Hardening depth of the raceway• Number and size of the rolling elements• Slewing Ring design• Raceway geometry

The limiting load diagram shows the permissible axial and tiltingmoment loads for the respective size unit. Each loading case includingthe required or recommended safety must lie below the limitingload line for the selected Slewing Ring.

Limiting load diagrams are valid under the following condition:

Static loadingLimiting load line with safety 1Bolt clamping length between 5 and 10 times the bolt diameterContinuous threads up to bolt head are not permissibleStrength of bolts according to grade 8All mounting holes used“Compressive” axial load (load applied according to fig. 5)Adequately stiff and level mounting structureMinimum strength of mounting structure >72500 psiRadial loading considered as specifiedCompliance with “Installation and Operating Manual”

•••••••••••

Figure 5

In the case of applications with higher duty factors or continuousrunning it is recommended that a calculation of service life is carriedout. Please contact our Engineering Department for assistance.

The application service factors and the required static safety S0 forthe existing loads are to be taken account of in the followingequations:

FaxD = Fax • fa • S0

To account for the prevailing radial load the tilting moment isincreased correspondingly, at the same time the radial componentsfrom the gearing are also to be taken into account.

FradD = (Frad + FradZ) • fa • S0

MkD = Mk • fa • S0 + 0.144 • FradD • da

FradZ = Fzcos 20°

Fax

Frad

MK

Application

Construction machinery

Forestry machinery

Foundries

Manlift platforms

Mech. engineering, general

Mech. engineering, general

Measuring technique

Robots / mech. handling sys.

Rail vehicles

Special vehicles

Deep mining

Shipboard cranes

Cranes

Cranes

Stackers & attachments

Wind power turbines

Machine tools

Application service factor fa

1.25

1.50

1.75

1.30

1.25

1.50

2.00

1.50

1.50

1.50

1.75

1.10

1.25

1.45

1.10

2.00

1.50

Remarks

Normal operation

Rough operation

Rough operation

Normal operation

Normal operation

Heavy operation

Precision required

Precision required

Rough operation

Rough operation

Rough operation

Normal operation

Average operation

Heavy operation

Light shocks

Risk of false brinelling

Precision required

Table 1: Application service factors

+ 0.046 • Fax

This equation applies only if:

(Frad + FradZ) 2,4 •Mkda

To address the peculiarities of different applications, the followingapplication service factors are to be considered with respect to theoperating conditions:(Note, these factors may be superseded by customer specification,FEM classifications, calculation or design regulations by certifyingauthorities.)

Equivalent Axial Force

Radial force from gearing circumferential force

Equivalent Radial Force

Equivalent Tilting Moment

daMF

in [ft-lbs]in [in]

in [lbs]

42


Should the value be exceeded, the limiting load diagram no longerapplies.Please contact our Engineering Department for assistance.

Mounting boltsPrevailing loads must be safely transmitted. To ensure this, mountingbolts should be sized to handle the raceway loading. The bolt curveis depicted in the static limiting load diagram subject to the followingconditions:

Static load carrying capacity of the mounting bolts

Determining the operation load level, both with and without radialload, occurs along with the verification of the static load carryingcapacity of the raceway.

If the prevailing load case lies below the limiting load line in thestatic limiting load diagram then the bolted connection is staticallyadequately dimensioned.

Dynamic load carrying capacity of the mounting bolts

Mostly, static dimensioning of a mounting bolt is sufficient.In cases where very high numbers of stress reversals act on theSlewing Ring, dynamic verification is necessary. Please contact ourEngineering Department for assistance.

Frictional capability of bolt connection

When radial loads act on the Slewing Ring, it must be ensured thatthese loads can be transmitted without shearing forces occurringin the bolts. Therefore, it must be determined whether the radialload can be transmitted via frictional contact between the mountingstructure and the Slewing Ring.

•

•

•

•

•

•

Quote the fulfillment of the conditions in the case of consideringthe static load capacity of the raceway.The limiting load diagram is applicable for “compressive” loads(see Fig. 4).In the case of “suspended” loads, the bolts are subject to additionaltensional forces. Please contact our Engineering Department forassistance.The bolts of strength grade 8 are tightened according to specificationwith a torque wrench (αA = 1.6). You can find the tighteningtorques in our Installation and Operating Manual. If there are otherconditions please talk to our Engineering Department.Bolts above M30 should be tightened with an hydraulic tighteningdevice to 85% of the yield point. Details on this can be found inour Installation and Operating Manual.For Slewing Rings with through holes, use the largest possiblemetric bolts with regular threads.

If the prevailing radial load exceeds the limit value, please contactour Engineering Department for assistance.

Frad max =nb • Fsp

18.8If the operating load point lies below the limiting load line then theSlewing Ring is statically adequately dimensioned. If loads frequentlyoccur during the slewing process, the selected type should be re-evaluated dynamically for service life. Please contact our EngineeringDepartment for assistance.

Calculation example:

Application:

Load:

Slewing equipment for a construction machineunder normal operation, no additional safety factorS0 ( S0 = 1) is required.

Axial loadRadial loadTilting moment load

360001300

88500

Slewing Ring: pre-selected series 120Type 10-20 0941 / 0-02062

The following values are achieved with an application servicefactor of 1.25:

FaxD = 36000 lbs • 1.25 = 45000 lbs

FradD = 1300 lbs • 1.25 = 1630 lbs

At this point it can be verified in the limiting load diagram, whetheror not the pre-selected Slewing Ring is statically adequate.

Limiting load diagram,Series 120

MkD = 88500 • 1.25 + 0.144 • 1630 • 37.1

lbslbsft-lbs

= 119333 ft-lbs

175

150

125

100

75

50

25

0

50 100 150 200 250 300 3500

Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]

Equivalent axial load [lbs x 1000]

Permissible zone

Operating load point

45

119.3

Bolt curve

Raceway curve

Unpermissible zone

Fnb

in [lbs]in [-]

43

For Slewing Rings with a different number or size of the bolts in theinner and outer ring, the permissible radial load is to be determinedfor both rings. The smaller value is the limiting value.

Friction contact prevails if Frad max is greater than the prevailing radialload.

Securing the mounting bolts

When a customer desires that the mounting bolts shall be secured,we recommend the following products (manufacturer specificationis valid):

Loctite ®Application of Loctite 270 is suitable for the highest level ofconnections. This prevents loosening and provides thread sealing.Please observe the instructions and requirements of the manufacturerwhen using this product.

Nord-Lock ®Nord-Lock, self-locking washers, are recommended for cases ofvibration or dynamic loading cycles.Due to a pair of square tapered washers with tapered surfacegradients between both Nord-Lock securing washers greater thanthe gradient of the bolt threads, any loosening tendency of the boltis immediately prevented.Please observe the instructions and requirements of the manufacturerwhen using this product.

Other bolt securing systems are not approved.

Friction torque

The friction torque of Slewing Rings depends upon many influencefactors, such as:

• Rigidity and flatness of the mounting structure• Load and loading combination• Rotational speed and operating temperature• Design of raceway system• Number and frictional torque of seals• Lubrication grease and filling level• Manufacturing tolerances• Other factors

The friction torque for a Slewing Ring under load can be determinedwith the following equation, approximately:

Mw = 10-3 • (22 • Mk + 1,67 • da • Frad + 0,42 • da • Fax) + MwA

Gear

Gearing designSlewing Rings can optionally be selected with spur gears conformingwith DIN 3960, DIN 3962 and AGMA. The toothing is eithernormalized or quenched and tempered according to the SlewingRing series. If higher torques or longer service life are requiredtoothing is available in the quenched and tempered or hardenedcondition.

Permissible tooth forces fz norm and fz maxThe data is available in the Technical Information section and definedas the gearing circumferential force and refer to the tooth base. Thevalues for fz max are calculated with a safety factor against fractureof 2, the values for fz norm are calculated with SF=1 with respect tothe tooth base fatigue. The pinion is thereby taken into account ashardened and grounded with z1=17 and x1=0.5.In the Series 120 and 920 the safety factor against fracture is 1.5and the values for fz norm are determined with SF=0.85 and aretherefore in the fatigue strength range.In the case of standard single-sided pinion bearings the static safetyfactor should not be less than1.5. If a pinion with fewer teeth andwith addendum modification coefficient is used, please contact ourEngineering Department for assistance.

The required gearing circumferential force can be determined fromthe existing or the required torque:

According to whether Fz is calculated from the torque at the SlewingRing or the pinion, the corresponding number of teeth and thecorresponding friction torque must be used.

If more detailed calculations such as service life etc. are neededplease contact our Engineering Department for assistance.MwA = 0,048 • da2

MwA = 0,476 • da2

Fz = 24Md • Pd

z

Slewing Rings in the Series 116, 120, 125, 150 and 920 withpreloaded raceways

M in [ft-lbs]da in [in]

The friction torque of an unloaded Slewing Ring can be determinedapproximately with the following equations:

Slewing Rings in the Series 116, 120, 125, 150 and 920 withminimum clearance greater than zero

MPd

F

daMF

in [ft-lbs]in [in]

in [lbs]

in [ft-lbs]in [1/in]

in [lbs]

44


Lubrication

To ensure flawless operation and a long usable life, adequate andregular lubrication is necessary. The grease fulfills the followingfunctions:

For the raceway:

• Reduction of friction and wear in the rolling contacts• Corrosion protection• Lubrication of seals• Additional sealing effect of grease collar• Low friction torque

For the gears:

• Smoother running• Lower wear• Reduced operating noise• Longer useful life• Lower heat development

Initial greasing

IMO Slewing Rings are supplied pre-lubricated. High-quality lithium-complex grease, based on mineral oil, with EP - additives accordingto DIN 51825, KP2P-20 is the standard lubricant.

Regreasing intervals

Regreasing must be done at regular intervals, depending on frequencyof use and ambient operating conditions. General attention mustbe payed to ensure that the grease used during the greasing iscompatible with the sealing material. Special attention should bepaid to ensure that lubricating grease types originally specified areused throughout the life of the unit.Should you wish to use other types of grease, it must be verifiedwhether the grease is compatible with that used for initial greasing.Please contact your grease manufacturer.Please observe also the data in the”Installation and OperatingManual“ chapter.

Beside regular regreasing during operation, it is also necessary togrease the Slewing Rings before and after long inactive periods.Equally important is to regrease the equipment after cleaning.

Attention:Slewing Rings must not be cleaned with pressure washingequipment. During pressure washing, large amounts ofpressurized water can penetrate into the Slewing Ring throughthe sealing gap and cannot be removed, even by massiveregreasing. This will strongly reduce the usable service life ofa Slewing Ring.

Mixing greases

Greases with different thickeners and / or base oils should generallynot be mixed. The manufacturer should always confirm if differentgrease types can be mixed.

Drive pinion

The permissible tooth forces (gearing circumferential force) havebeen determined with a pinion with z1=17 and x1=0.5. If no specialrequirements exist with respect to the gear ratio the drive pinioncan be designed with this gear data. The width of the pinion teethshould also be more than the teeth on the Slewing Ring. Thedifference between teeth widths should be approximately equal tothe module.If less than 17 teeth are used for the pinion, the gearing should bechecked by calculations. The recommended gear quality for thepinion is 8e26 or better. In the case of very high tooth forces werecommend a pinion tip relief and a wide crown design, pleasecontact our Engineering Department for assistance.

Tooth backlash

The tooth backlash is set at the highest point of the gear. It dependson the module of the gear and is calculated according to the followingequation:

Tooth backlash to be set

For setting the circumferential backlash, the tooth zone with therun-out 'high point' is marked with green. The backlash is to be setat this point.

Shock coefficient

As for the applications in which impact is expected, the appropriateimpact coefficients must be considered when determining the SlewingRings`maximum torque rating.

Service life

The service life of the gear depends on the operating conditions. Thefollowing factors are key:

• Torque• Output speed• Duty factor• Ambient temperature• Lubrication etc.

Drive power

In principle the drive should be dimensioned conservatively. Thefriction torque of a Slewing Ring can have a wide spread due to theload combination and magnitude, the design of the mountingstructure, the raceway clearance and many other factors.

If the required drive torque is determined from the friction torqueof the Slewing Ring it is necessary to start with twice the calculatedvalue for the design of the drive power. Similarly additions shouldbe made for the accelerating and decelerating of the moved massesand for any further power requirements according to the application.

δf = 0.03 to 0.04 •1Pd Pd

δfin [1/in]in [in]

45

Shelf life of lubricants

Lubricants are subject to ageing even if unused. If after about 3years grease is not yet used, it should be replaced.

Design of mounting structure

Safe transmission of application loads and reliable operation ofSlewing Rings is achieved, along with other factors, through usingadequately designed mounting structures. To ensure safe operationof Slewing Rings, there are certain minimum requirements to themounting structure:

• Sufficient rigidity (see Installation and Operating Manual)• Maintain flatness according to Installation and Operating Manual• No hard points (e.g. through cross beams)• Bolting surfaces must be machined flat• A hollow mounting structure is preferred• Use all mounting bolts• Bolts of recommended strength should be used• Minimum strength of attached structure >72500 psi

Very different mounting structure solutions can be used, dependingupon maximum load and application. If a hollow mounting structureis intended flange thickness should be at least 50% of the overallSlewing Ring height. The thickness of the hollow mounting structureshould be about 1/3 of the flange thickness. For weight-criticalapplications, flange thickness can only be reduced if appropriatestiffening ribs are provided and specifications on permissible flatness,perpendicularity deviations and deformation under load are achieved.Values on this are specified in the “Installation and OperatingManual”.

H

min. H6

min

.H 2

min

.H 2

min. H6

You will find a detailed procedure on the following pages!

Start• Load data determined• Rotational speed known• Tooth forces calculated• Application factors selected

Selectioncompleted Yes

Are all valuesin the

permissiblerange

No

We recommend that the Slewing Ring selection is checked at IMO.Please fill in the Application Data sheet on pages 60/61 and provide a sketch of the application.46

A few simple steps for selecting a Slewing Ring

6000

5000

4000

3000

2000

1000

01000 2000 3000 4000 5000 6000 7000

Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]


0

Position 1

34

2

5

Checking of the racewayand bolt connection

Checking of gearing

Selecting a design

47

Robust design

Rough mounting structure

Vibrations

High load capacity

High service life

Reduced clearance

Low friction torque under load

Uniform friction torque under load

High rotational speed

Small diameter

Large diameter

High axial load

High tilting moment load

High precision

High rigidity

Series

Requirement

Selection list for optimum series

920 120 116 150

++

++

––

–

–

++

–

–

–

–

125

++

+

+

++

++

–

+

+

+

+

+

+

++

+

+

+

+

+

+

+

+

+

+

++

+

+

–

–

++

++

++

–

–

–

++

++

+

++

++

No liability

Special design

++2)

++2)

++2)

++2)

++2)

++2)

++2)

++2)

++2)

++2)

++2)

++2)

++2)

11-50 1900/2-06400

11-50 2130/2-06410

11-50 2355/2-06420

11-50 2645/2-06430

84.220

93.732

102.551

113.890

74.724

83.780

92.638

104.055

74.882

83.937

92.795

104.213

1808

2053

2258

2518

78.937

87.992

96.850

108.268

70.669

79.724

85.583

100.000

36

48

54

60

82.677

91.969

100.787

112.126

14

16

16

16

150

146

160

178

29675

34845

34845

34845

51481

61373

61373

61373

747040

837413

925763

1039741

Load ratingsGearing and tooth forcesMounting holesDimensions and weight

Da di Di da La Li n do z2 fz norm fz max Co rad Co ax C rad C ax

[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [mm] [lbs] [lbs] [lbs] [lbs] [lbs] [lbs]Dr

awin

g nu

mbe

r

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Pitch

circl

e di

amet

er,in

ner r

ing

Num

bers

of h

oles

per p

itch

circle

Pitch

circl

e di

amet

er

Mod

ule

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

Stat

ic

Dyna

mic

68.071

77.126

85.984

97.402

[ - ]

1998776

2240896

2477395

2782685

253809

264600

274941

287531

295624

308213

320353

334965

1

2

3

4

Posit

ion

+0.50

+0.50

+0.50

+0.50

x2

Adde

ndum

mod

ificat

ion

coef

f.

[ - ]mG

48


Step 5: Static checking of gearing

A check should be made using the maximum expected tooth forceto see whether the gearing has been adequately dimensioned. Ifthe existing maximum tooth force has been determined from thefriction torque under the maximum load, then this value must bedoubled before comparison with the value in the table. If thecorresponding masses are accelerated or decelerated the respectivetorques must also be taken into account.

If all the values for the selected Slewing Ring are in thepermissible zone the Slewing Ring can be used. Finally, wewould strongly recommend that your choice is confirmed byour Engineering Department.

In the case of high duty cycles or continuous running werecommend that a service life calculation is carried out by ourEngineering Department.

The correct Slewing Ring in 5 steps

Step 1: Determining the load

The first step is to determine the loads and rotational speeds. Hereit is necessary to consider both axial as well as radial loads and tiltingmoment loads. It is also important to take account of those loadswhich can result from extreme situations such as high wind loads,loads during assembly, possible tilting etc.

Furthermore shock factors and the necessary safety factors mustalso be taken into account.

Step 2: Determining the Size

One or the other series is better suited according to the application.To make the optimum choice the following table shall be used todetermine the suitable / adaptable size.

Step 3: Static checking of raceway

Using the static limiting load diagram a check must be made onwhether the existing forces including the safety factors to be useddo not exceed the permissible loads for the raceway.

The load, including the shock factors, the necessary safety factorsand the calculated radial load must be in the permissible zone ofthe raceway curve and the expected rotational speeds must bebelow the limit. If the load is above the curve then the next size upor a stronger series must be selected. If the expected rotationalspeed is above the limit then the next smaller size or another serieswith higher limits must be selected.

Step 4: Checking of bolt connection

In the same limiting load diagram a check should also be madewhether the load point is below the bolt curve. The load mustinclude the shock factors, the necessary safety factors and thecalculated radial load. If the load is above the curve then the nextsize up or a stronger series must be selected. In addition anexamination should be carried out with the equation on Page 42to check whether frictional contact is present.

Evaluation code

––

–

+

++

Less suitable / adaptable

Suitable / adaptable under certain conditions

Medium

Good

Very good

Robust design

Rough mounting structure

Vibrations

High load capacity

High service life

Reduced clearance

Low friction torque under load

Uniform friction torque under load

High rotational speed

Small diameter

Large diameter

High axial load

High tilting moment load

High precision

High rigidity

Series

Requirement

Selection list for optimum series

920 120 116 150

++

++

––

–

–

++

–

–

–

–

125

++

+

+

++

++

–

+

+

+

+

+

+

++

+

+

+

+

+

+

+

+

+

+

++

+

+

–

–

++

++

++

–

–

–

++

++

+

++

++

No liability

49

The permissible tooth force fz max is 57101 lbs and is thereforesignificantly above the existing tooth force Fz of 14000 lbs.

The permissible rotational speed for this type is:

and is significantly over the existing rotational speedof 1.3 rpm.

This concludes the examination and the selection should beconfirmed by IMO together with details of the loads.

Example:Application: Crane operating in medium conditionsLoad data:Axial loadRadial loadTilting momentTooth forceMax. rotational speed

Special requirements:Internal toothed design, no special precision required.Diameter range about 60 inchAdditional safety factor S0 = 1.1

From the table of fa values, fa = 1.25 for medium duty cranes,from this you get: Pre-selection - Series 125,Item 12-25 1455/1-03270 da = 57.205 inch

FaxFradMkFz maxn

= 73000= 10000= 341000= 14000= 1.3

lbslbsft-lbslbsrpm

Limiting load diagram, Series 125

According to the limiting load diagram the pre-selected typecannot be used. There is also no other usable Slewing Ring inthis series.The new pre-selection is type 12-50 1800/2-06500

Limiting load diagram, Series 150

The selected Slewing Ring 12-50 1800/2-06500 is in thepermissible zone.

Reading off the load point on the limiting load diagram.

5250

4500

3750

3000

2250

1500

750

0250 500 750 1000 1250 1500 17500

Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]


Selected Type12-50 1800/2-06500

770

660

550

440

330

220

110

0100 200 300 400 500 600 7000

Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]


Curve for 12-25 1455/1-03270

Load point for 12-25 1455/1-03270 not permissible!

FradD = (FradD + Fz/cos20°) • fa • So

= Fax • So • fa = 73000 lbs • 1.25 • 1.1 = 100375 lbs

= Mk • So • fa + 0.144 • FradD • da

= (10000 lbs + 14000 lbs/cos20°) • 1.25 • 1.1 = 34235 lbs

FaxD

MkD

= 341000 • 1.25 • 1.1 + 0.144 • 34235 • 57.205= 750886 ft-lbs

FradD = (FradD + Fz/cos20°) • fa • So

= (10000 lbs + 14000 lbs/cos20°) • 1.25 • 1.1

= Mk • So • fa + 0.144 • FradD • daMkD

= 341000 • 1.25 • 1.1 + 0.144 • 34235 • 70.945= 818622 ft-lbs

da = 70.945 inch

= Fax • So • fa = 73000 lbs • 1.25 • 1.1 = 100375 lbsFaxD

New calculation:

= 34235 lbs

nperm = 1600 =da

160070.945

= 22.6 rpm

50

Untoothed

Internal toothed

Series 920 standard design

External toothed

91-20 0311/1-37102

91-20 0413/1-37112

91-20 0541/1-37122

91-20 0641/1-37132

91-20 0741/1-37142

91-20 0841/1-37152

91-20 0941/1-37162

91-20 1091/1-37172

15.900

19.900

25.150

29.150

32.900

37.200

41.200

46.867

12.421

16.437

21.476

25.413

29.350

33.287

37.224

43.130

12.303

16.319

21.358

25.295

29.232

33.169

37.106

43.012

50

67

91

107

130

157

172

201

14.000

18.000

23.250

27.250

31.000

35.000

38.880

44.630

8

8

12

15

18

18

18

20

9.130

13.130

18.130

22.130

26.130

30.000

34.000

39.880

12

12

15

18

18

18

20

24

15.50

19.500

24.750

28.750

32.500

36.667

40.667

46.333

4

4

4

4

4

3

3

3

62

78

99

115

130

110

122

139

2540

2540

2540

2540

2540

3700

3700

3700

5800

5800

5800

5800

5800

7960

7960

7960


Da di Di da b La na Li ni do z2 fz norm fz max

[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Diam

etra

l Pitc

h

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

Diam

eter,

inne

r rin

g

8.031

11.969

17.087

21.024

24.961

28.898

32.835

38.740

10.591

14.528

19.646

23.583

27.520

31.457

35.394

41.299

[ - ]

20008

26527

34845

41365

47659

54179

60474

70140

Co rad Co ax C rad C ax

[lbs] [lbs] [lbs] [lbs]

Stat

ic

Dyna

mic

46760

61822

81381

96443

111505

126567

141630

164111

31473

35070

38892

41365

43613

45861

47884

50357

31473

35070

39117

41590

43838

46086

48109

50582

1

2

3

4

5

6

7

8

Posit

ion

92-20 0311/1-37202

92-20 0413/1-37212

92-20 0541/1-37222

92-20 0641/1-37232

92-20 0741/1-37242

92-20 0841/1-37252

92-20 0941/1-37262

92-20 1091/1-37272

16.457

20.394

25.512

29.449

33.386

37.323

41.260

47.165

12.421

16.437

21.476

25.413

29.350

33.287

37.224

43.130

12.303

16.319

21.358

25.295

29.232

33.169

37.106

43.012

47

60

84

99

115

139

152

183

15.35

19.25

24.38

28.38

32.25

36.25

40.13

46.00

8

8

10

12

15

18

18

18

10.50

14.88

19.63

23.63

27.63

31.50

35.50

41.50

12

12

15

18

18

18

20

24

9.00

13.25

18.00

22.00

26.00

29.67

33.67

39.67

4

4

4

4

4

3

3

3

36

53

72

88

104

89

101

119

2830

2830

2830

2830

2830

4080

4080

4080

6290

6290

6290

6290

6290

8940

8940

8940


Da di Di da a La na Li ni do z2 fz norm fz max[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Diam

etra

l Pitc

h

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

Diam

eter,

oute

r rin

g

8.350

12.850

17.600

21.600

25.600

29.133

33.133

39.133

13.898

17.835

22.953

26.890

30.827

34.764

38.701

44.606

[ - ]

1

2

3

4

5

6

7

8

Posit

ion

90-20 0311/0-37002

90-20 0413/0-37012

90-20 0541/0-37022

90-20 0641/0-37032

90-20 0741/0-37042

90-20 0841/0-37052

90-20 0941/0-37062

90-20 1091/0-37072

16.457

20.394

25.512

29.449

33.386

37.323

41.260

47.165

12.421

16.437

21.476

25.413

29.350

33.287

37.224

43.130

12.303

16.319

21.358

25.295

29.232

33.169

37.106

43.012

43

53

70

84

101

115

128

150

15.35

19.25

24.38

28.38

32.25

36.25

40.13

46.00

8

8

12

12

15

18

18

18

9.130

13.130

18.130

22.130

26.130

30.000

34.000

39.880

12

12

15

18

18

18

20

24

Load ratingsMounting holesDimensions and weight

Da di Di da b La na Li ni

[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [ - ]

20008

26527

34845

41365

47659

54179

60474

70140

Co rad

[lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Stat

ic

Dyna

mic

Diam

eter,

inne

r rin

g

8.031

11.969

17.087

21.024

24.961

28.898

32.835

38.740

10.591

14.528

19.646

23.583

27.520

31.457

35.394

41.299

Co ax

[lbs]

46760

61822

81381

96443

111505

126567

141630

164111

C rad

[lbs]

31473

35070

38892

41365

43613

45861

47884

50357

C ax

[lbs]

31473

35070

39117

41590

43838

46086

48109

50582

1

2

3

4

5

6

7

8

Posit

ion

a[inch]

Diam

eter,

oute

r rin

g

13.898

17.835

22.953

26.890

30.827

34.764

38.701

44.606

G

G

G

20008

26527

34845

41365

47659

54179

60474

70140



Stat

ic

Dyna

mic

46760

61822

81381

96443

111505

126567

141630

164111

31473

35070

38892

41365

43613

45861

47884

50357

31473

35070

39117

41590

43838

46086

48109

50582

Pd

Pd

51

Radial clearance: 0 - 0.012 inchAxial tilting clearance: 0 - 0.02 inchBearing ring material: C45NGear tooth form: 20-degree stub involute systemNecessary backlash at the pinion: 0 - 0.006 inch4 Taper type grease nipples on the circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse

Design variants

If you require something different from the standard design, simply replacethe last digit of the corresponding drawing number as follows:

Standard design= Reduced clearance radial clearance: 0 - 0.004 inch axial tilting clearance: 0 - 0.008 inch= Bearing rings without holes= Double number of holes= Backlash-free bearing with preload

90-20 0311/0-0700 21

467

120

105

90

75

60

45

30

15

025 50 75 100 125 150 1750

12

34

56

7

8

da

bLi

di

Di

La

Da

a

0.47

2

1.73

2

ø0.688

0.47

2

2.20

51.73

2

ø0.688

Limiting load diagram for “compressive” loads - Series 920

Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]


Raceway curveBolt curveBolt grade 8

Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!

1.73

20.

750

Di

do

Da

La

da

bLi

diø0.688

1.73

22.

205

0.47

2

1/2-13 UNC-2B

1.73

22.

205

ø0.688

0.472

di

Li

da

do

Da

aDi

0.75

0 1.73

2

La

1/2-13 UNC-2B

Position

Characteristics• Robust design for rough mounting structure• Cost-optimized design• Ideally suitable for applications with low precision requirements• For Series 920 precision versions are available

52

Untoothed


External toothed

11-16 0100/1-08100

11-16 0200/1-08110

11-16 0300/1-08120

11-16 0400/1-08130

11-16 0500/1-08140

7.087

11.024

14.961

18.898

22.835

4.055

7.992

11.929

15.866

19.803

3.819

7.756

11.693

15.630

19.567

11

20

30

40

49

5.512

9.449

13.386

17.323

21.260

6

12

20

24

28

2.362

6.299

10.236

14.173

18.110

6

12

20

24

28

6.772

10.709

14.646

18.583

22.520

4

4

4

4

4

43

68

93

118

143

2023

2068

2068

2113

2113

3597

3822

4002

4047

4159


Da di Di da La na Li ni do z2 fz norm fz max

[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [mm] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Mod

ule

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

1.575

5.512

9.449

13.386

17.323

[ - ]

1

2

3

4

5

Posit

ion

10-16 0100/0-08000

10-16 0200/0-08010

10-16 0300/0-08020

10-16 0400/0-08030

10-16 0500/0-08040

7.087

11.024

14.961

18.898

22.835

4.055

7.992

11.929

15.866

19.803

3.819

7.756

11.693

15.630

19.567

11

22

31

42

53

5.512

9.449

13.386

17.323

21.260

6

12

20

24

28

2.362

6.299

10.236

14.173

18.110

6

12

20

24

28


Da di Di da La na Li ni

[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

1.575

5.512

9.449

13.386

17.323

11456

22706

34171

45636

56877



Stat

ic

Dyna

mic

23155

46535

69691

93071

116226

15961

22256

26303

29225

31923

13713

19109

22706

25179

27427

1

2

3

4

5

Posit

ion

m

G

G

11456

22706

34171

45636

56877



Stat

ic

Dyna

mic

23155

46535

69691

93071

116226

15961

22256

26303

29225

31923

13713

19109

22706

25179

27427

53

Radial clearance: 0 - 0.008 inchAxial tilting clearance: 0 - 0.016 inchBearing ring material: C45N1 Taper type grease nipple, form C in filling plugMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse

45.0

37.5

30.0

22.5

15.0

7.5

012.5 25.0 37.5 50.0 62.5 75.0 87.50

1

2

3

4

5

Position

Li

di

da

ø0.433

Di

La

Da

M10x1.5

1.18

1

1.18

11.

378


Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]

1.18

1

Di

La

Da

Li

di

da

ø0.433

1.18

11.

378

do

M10x1.5




Characteristics• Robust design• Insensitive to vibrations• Cost-optimized design• Medium precision• For Series 116 & 120 precision versions are available

54

Untoothed

Internal toothed


External toothed

11-20 0311/1-32102

11-20 0413/1-32112

11-20 0541/1-32122

11-20 0641/1-32132

11-20 0741/1-32142

11-20 0841/1-32152

11-20 0941/1-32162

11-20 1091/1-32172

15.900

19.900

25.150

29.150

32.900

37.200

41.200

46.867

12.421

16.437

21.476

25.413

29.350

33.287

37.224

43.130

12.303

16.319

21.358

25.295

29.232

33.169

37.106

43.012

51

71

95

115

128

157

170

198

14.000

18.000

23.250

27.250

31.000

35.000

38.880

44.630

14

14

18

20

24

28

28

32

9.500

13.500

18.500

22.500

26.500

30.500

34.380

40.250

12

12

15

18

18

20

20

24

15.500

19.500

24.750

28.750

32.500

36.667

40.667

46.333

4

4

4

4

4

3

3

3

62

78

99

115

130

110

122

139

2540

2540

2540

2540

2540

3700

3700

3700

5800

5800

5800

5800

5800

7960

7960

7960

43163

57101

75086

88800

102738

116676

130389

151296


Da di Di da La na Li ni do z2 fz norm fz max Co rad Co ax C rad C ax

[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs] [lbs] [lbs] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Diam

etra

l Pitc

h

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

Stat

ic

Dyna

mic

7.500

12.000

17.000

21.000

25.000

28.830

32.830

38.750

[ - ]

100714

133087

175351

207723

240043

272468

304841

353400

31473

35070

38892

41365

43613

45861

47884

50357

31473

35070

39117

41590

43838

46086

48109

50582

1

2

3

4

5

6

7

8

Posit

ion

12-20 0311/1-32202

12-20 0413/1-32212

12-20 0541/1-32222

12-20 0641/1-32232

12-20 0741/1-32242

12-20 0841/1-32252

12-20 0941/1-32262

12-20 1091/1-32272

17.000

20.400

25.500

29.500

33.400

37.400

41.250

47.180

12.421

16.437

21.476

25.413

29.350

33.287

37.224

43.130

12.303

16.319

21.358

25.295

29.232

33.169

37.106

43.012

49

68

95

110

126

152

165

201

15.000

19.000

24.000

28.000

32.000

35.750

39.750

45.620

8

8

12

15

15

18

18

20

10.500

14.880

19.630

23.630

27.630

31.500

35.500

41.500

16

16

20

24

28

30

32

36

9.000

13.250

18.000

22.000

26.000

29.667

33.667

39.667

4

4

4

4

4

3

3

3

36

53

72

88

104

89

101

119

2830

2830

2830

2830

2830

4080

4080

4080

6290

6290

6290

6290

6290

8940

8940

8940


Da di Di da La na Li ni do z2 fz norm fz max[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Diam

etra

l Pitc

h

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

8.350

12.850

17.600

21.600

25.600

29.133

33.133

39.133

[ - ]

1

2

3

4

5

6

7

8

Posit

ion

10-20 0311/0-32002

10-20 0413/0-32012

10-20 0541/0-32022

10-20 0641/0-32032

10-20 0741/0-32042

10-20 0841/0-32052

10-20 0941/0-32062

10-20 1091/0-32072

17.000

20.400

25.500

29.500

33.400

37.400

41.250

47.180

12.421

16.437

21.476

25.413

29.350

33.287

37.224

43.130

12.303

16.319

21.358

25.295

29.232

33.169

37.106

43.012

46

64

82

97

115

130

146

170

15.000

19.000

24.000

28.000

32.000

35.750

39.750

45.620

8

8

12

15

15

18

18

20

9.500

13.500

18.500

22.500

26.500

30.500

34.380

40.250

12

12

15

18

18

20

20

24

43163

57101

75086

88800

102738

116676

130389

151296


Da di Di da La na Li ni Co rad Co ax C rad C ax

[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [lbs] [lbs] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Stat

ic

Dyna

mic

7.500

12.000

17.000

21.000

25.000

28.830

32.830

38.750

100714

133087

175351

207723

240096

272468

304841

353400

31473

35070

38892

41365

43613

45861

47884

50357

31473

35070

39117

41590

43838

46086

48109

50582

1

2

3

4

5

6

7

8

Posit

ion

Pd

Pd

G

G

G

43163

57101

75086

88800

102738

116676

130389

151296



Stat

ic

Dyna

mic

100714

133087

175351

207723

240043

272468

304841

353400

31473

35070

38892

41365

43613

45861

47884

50357

31473

35070

39117

41590

43838

46086

48109

50582 55

Radial clearance: 0 - 0.012 inchAxial clearance: 0 - 0.02 inchBearing ring material: C45NGear tooth form: 20-degree stub involute systemNecessary backlash at the pinion: 0 - 0.006 inch4 Taper type grease nipples on circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse

175

150

125

100

75

50

25

0

50 100 150 200 250 300 3500

34

6

8

21Position

1.73

20.

75

1/2-13 UNC-2B Di

do

Da

La

da

Li

di

1.73

22.

205

ø0.688

Da

Di

La

di

Li

da

do

0.75

1.73

2

ø0.688

1.73

22.

205

da

Li

di

2.20

51.73

2

Di

La

Da

1.73

2

ø0.688

ø0.688


Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]




1/2-13 UNC-2B

5

7

Characteristics• Robust design• Insensitive to vibrations• Cost-optimized design• Medium precision• For Series 116 & 120 precision versions are available

56

Untoothed

Internal toothed


External toothed

11-25 0455/1-0411011-25 0555/1-0412011-25 0655/1-0413011-25 0755/1-0414011-25 0855/1-0311011-25 0955/1-0312011-25 1055/1-0313011-25 1155/1-0314011-25 1255/1-0315011-25 1355/1-0316011-25 1455/1-03170

17.99221.92925.86629.80333.74037.67741.61445.55149.48853.42557.362

17.83521.77225.70929.64633.58337.52041.45745.39449.33153.26857.205

163205245276320342377410443481514

20.31524.25228.18932.12636.06340.00043.93747.87451.81155.74859.685

1820242428303036424248

15.55119.48823.42527.36231.29935.23639.17343.11047.04750.98454.921

1820242428303036424248

22.67726.77230.86634.72438.62242.52046.45750.39454.33158.26862.205

888999

1010101010

72859898

109120118128138148158

62956295629580938093809396679667966796679667

1169011690116901461314613146131708517085170851708517085


Da di Di da La na Li ni do z2 fz norm fz max

[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [mm] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Mod

ule

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

13.97617.91321.85025.78729.72433.66137.59841.53545.47249.40953.346

[ - ]

123456789

1011

Posit

ion

12-25 0455/1-0421012-25 0555/1-0422012-25 0655/1-0423012-25 0755/1-0424012-25 0855/1-0321012-25 0955/1-0322012-25 1055/1-0323012-25 1155/1-0324012-25 1255/1-0325012-25 1355/1-0326012-25 1455/1-03270

21.85025.78729.72433.66137.59841.53545.47249.40953.34657.28361.220

17.99221.92925.86629.80333.74037.67741.61445.55149.48853.42557.362

17.83521.77225.70929.64633.58337.52041.45745.39449.33153.26857.205

141168225262302328364397430467500

20.27624.21328.15032.08736.02439.96143.89847.83551.77255.70959.646

1820242428303036424248

15.51219.44923.38627.32331.26035.19739.13443.07147.00850.94554.882

1820242428303036424248

12.59817.00820.78724.80328.74032.67736.61440.55144.48848.42552.362

888

1010101010101010

40546663738393

103113123133

719471947194

1056610566105661056610566105661056610566

1438814388143881933419334193341933419334193341933419334


Da di Di da La na Li ni do z2 fz norm fz max[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [mm] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Pitch

circl

e di

amet

er

Mod

ule

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

11.96916.37820.15724.01627.95331.89035.82739.76443.70147.63851.575

[ - ]

123456789

1011

Posit

ion

10-25 0455/0-0401010-25 0555/0-0402010-25 0655/0-0403010-25 0755/0-0404010-25 0855/0-0301010-25 0955/0-0302010-25 1055/0-0303010-25 1155/0-0304010-25 1255/0-0305010-25 1355/0-0306010-25 1455/0-03070

21.85025.78729.72433.66137.59841.53545.47249.40953.34657.28361.220

17.99221.92925.86629.80333.74037.67741.61445.55149.48853.42557.362

17.83521.77225.70929.64633.58337.52041.45745.39449.33153.26857.205

117143168198223254282306331359384

20.27624.21328.15032.08736.02439.96143.89847.83551.77255.70959.646

1820242428303036424248

15.55119.48823.42527.36231.29935.23639.17343.11047.04750.98454.921

1820242428303036424248

101838124319146800169056191537214018236274258755278763303492325973


Da di Di da La na Li ni Co rad Co ax C rad C ax

[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [lbs] [lbs] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Num

ber o

f hol

es,

oute

r rin

g

Pitch

circl

e di

amet

er,in

ner r

ing

Num

ber o

f hol

es,

inne

r rin

g

Stat

ic

Dyna

mic

13.97617.91321.85025.78729.72433.66137.59841.53545.47249.40953.346

272693332717392516452540512564572364632388692412752211812235872034

5597760249638466744371040737377643578908818308407986102

64970699167441278458825058587789024919479531997792

100490

123456789

1011

Posit

ion

m

m

23.24427.33931.43335.35439.25243.15047.16551.10255.03958.97662.913

G

G

G

101838124319146800169056191537214018236274258755278763303492325973



Stat

ic

Dyna

mic

272693332717392516452540512564572364632388692412752211812235872034

5597760249638466744371040737377643578908818308407986102

64,970699167441278458825058587789024919479531997792

100490

101838124319146800169056191537214018236274258755278763303492325973



Stat

ic

Dyna

mic

272693332717392516452540512564572364632388692412752211812235872034

5597760249638466744371040737377643578908818308407986102

64970699167441278458825058587789024919479531997792

100490

Radial clearance: 0 - 0.01 inchAxial clearance: 0 - 0.016 inchBearing ring material: C45N4 Taper type grease nipples on circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse

280

240

200

160

120

80

40

040 80 120 160 200 240 2800

4

770

660

550

440

330

220

110

0100 200 300 400 500 600 7000

1Position

2

3

5

87

9

10

11

Da

Di

La

di

Li

da

do

1.57

5

ø0.866

2.12

6

M20 x2.5

2.79

53.

150

1.57

5

M20 x 2.5 Di

do

Da

La

2.12

6

ø0.866

da

Li

di

2.79

5

3.15

0

2.12

6

Di

La

Da

da

Li

diø0.866

2.12

62.

480


Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]Eq

uiva

lent t

ilting

mom

ent [

ft-lb

s x 1

000]

57

6Position

M20 x 2.5







58

Internal toothed

External toothed


11-50 1900/2-06400

11-50 2130/2-06410

11-50 2355/2-06420

11-50 2645/2-06430

84.220

93.732

102.551

113.890

74.724

83.780

92.638

104.055

74.882

83.937

92.795

104.213

1808

2053

2258

2518

78.937

87.992

96.850

108.268

70.669

79.724

85.583

100.000

36

48

54

60

82.677

91.969

100.787

112.126

14

16

16

16

150

146

160

178

29675

34845

34845

34845

51481

61373

61373

61373

747040

837413

925763

1039741


Da di Di da La Li n do z2 fz norm fz max Co rad Co ax C rad C ax

[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [mm] [lbs] [lbs] [lbs] [lbs] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Pitch

circl

e di

amet

er,in

ner r

ing

Num

bers

of h

oles

per p

itch

circle

Pitch

circl

e di

amet

er

Mod

ule

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

Stat

ic

Dyna

mic

68.071

77.126

85.984

97.402

[ - ]

1998776

2240896

2477395

2782685

253809

264600

274941

287531

295624

308213

320353

334965

1

2

3

4

Posit

ion

+0.50

+0.50

+0.50

+0.50

x2

Adde

ndum

mod

ificat

ion

coef

f.

[ - ]

12-50 1800/2-06500

12-50 2000/2-06510

12-50 2240/2-06520

12-50 2490/2-06530

12-50 2800/2-06540

77.598

85.472

94.921

104.764

116.969

70.787

78.661

88.110

97.953

110.157

70.945

78.819

88.268

98.110

110.315

1680

1858

2119

2321

2657

75.000

82.874

92.323

102.165

114.370

66.732

74.606

84.055

93.898

106.102

36

40

48

54

60

61.732

70.000

78.740

88.819

100.787

14

14

16

16

16

112

127

125

141

160

31698

31698

37318

37318

37318

57101

57101

65195

65195

65195


Da di Di da La Li n do z2 fz norm fz max

[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [mm] [lbs] [lbs]

Draw

ing

num

ber

Outsi

de d

iamet

er,ou

ter r

ing

Insid

e di

amet

er,in

ner r

ing

Insid

e di

amet

er,ou

ter r

ing

Outsi

de d

iamet

er,in

ner r

ing

Weig

ht

Pitch

circl

e di

amet

er,ou

ter r

ing

Pitch

circl

e di

amet

er,in

ner r

ing

Num

bers

of h

oles

per p

itch

circle

Pitch

circl

e di

amet

er

Mod

ule

Num

ber o

f tee

th

Perm

issib

leto

oth

force

Max

imum

per

miss

ible

toot

h fo

rce

61.181

69.449

78.110

88.189

100.157

[ - ]

5

6

7

8

9

Posit

ion

-0.50

-0.50

-0.50

-0.50

-0.50

x2

Adde

ndum

mod

ificat

ion

coef

f.

[ - ]m

mG

G

707699

777165

880577

978818

1100665



Stat

ic

Dyna

mic

1893566

2103987

2356447

2619474

2945672

248414

259205

269321

281011

292476

289104

301918

313608

282360

430810

59

Radial clearance: 0 - 0.016 inchAxial clearance: 0 - 0.03 inchBearing ring material: 42CrMo4V9 to 12 Taper type grease nipples on circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse

5250

4500

3750

3000

2250

1500

750

0250 500 750 1000 1250 1500 17500

5250

4500

3750

3000

2250

1500

750

0250 500 750 1000 1250 1500 17500

6

7

9

4

1Position

2

3

5Position

8

3.93

7

Di

do

Da

La

da

Li

di

ø1.299

3.89

84.

291

ø1.299

3.89

8

ø1.299 di

Li

da

do

Da

Di

La

ø1.299

3.93

74.

291


Equi

valen

t tilti

ng m

omen

t [ft-

lbs x

100

0]Eq

uiva

lent t

ilting

mom

ent [

ft-lb

s x 1

000]







Please copy, fill in and send to:McQueen Park, Summerville, South Carolina 29483, USA, Tel. +1 843 695-6200

Alternatively, you can fill in this sheet online atwww.goimo.com

2. Application description (please attach additional sketch):

Exchangeable with existing solution:

New Application:

Position of rotation axis:

Type of load:

No Yes

No Yes

Vertical HorizontalInclined/Changing

If yes: what should be considered? Replacement for: pls fill in below!

“Compressive”axial load

“Suspended”axial load

Degrees Middle position of rotation axis

Degrees Angle range±β

α

Company:

Contact person:

Address:

City:

Zip Code:

1. Contact:Homepage:

Email:

Phone:

Fax:

IMO USA Corp., 101 Innovation Drive

Vertical

Middle position ofrotation axis

3. Gearing

which ring is with gear?

Module

Diametral Pitch

Number of teeth

Width of teeth

Addendum modification coeff.

noneinternal external

Ambient temperature:

Do shocks or vibrations occur?

Special seals required?

Works Certificate?

Test certificate from authority required?

Special conditions or specifications to be considered?

No

No

No

No

No

minimum normal maximum

Yes

Yes

Yes

Yes

Yes

°F °F °F

against:

type:

type:

which:

(e.g. ISO 10474 3.2 according to EN 10204)

(e.g. ISO 10474 3.1B according to EN 10204)

(e.g. Lloyds; ABS; API; BV; DNV etc.)

(without gearing)

m

Pd

z

b

x

mm

-

in

-

Slewing Ring

mm

-

in

-

Drive pinion

-

in

Number of drive pinions

Centre distance

60

Application Data Sheet - Slewing Rings

1/in 1/in

Fax

Fax

Fax

Fax

4. Load parameters:

Slewing direction:

Peculiarities:

One direction only Alternating directions

Any additional application service factor?

Equipment utilization time in years:

Average operating hours per year:

yrs

hrs

5. Offer data:

Yearly usage:

Required delivery time:

Proposal required by:

Lot size:

Target price:

pieces per year

weeks

date

pieces per delivery lot

price per unit

No Which one:

6. Remarks:

Date: Processed by:

Yes

Axial load

Radial load

Tilting moment

perm gearing circumferential force

max gearing circumferential force

Torque (Slewing Ring)

Duty (% of rotation)

Rotational speed (Slewing Ring)

Rotational speed max (Slewing Ring)

Slewing angle

Slewing time

Interruption time

Angular acceleration

Continuous rotation without interruption

if: Interrupted rotationCycle description

Test load Extreme loadOperating load

Normal Maximum

Fax

Frad

Mk

fz norm

fz max

Md

ED

lbs

lbs

ft-lbs

lbs

%

lbs

ft-lbs

rpm

n max

δS1

αb

tS1

tU1

degrees

s

s

rad/s2

n

rpm

61

Application Data Sheet - Slewing Rings

Fax

Frad

MK

62

Notes

For custom configurations, we alsosupply material certificates. Thesecertificates log the actual values ofmaterial characteristics such astensile strength, apparent yieldingpoint, notched bar impact work,extension and chemical analysis.

Destructive and non-destructive material testsare performed accordingto the latest industryrecognized methods(i.e. ultrasonic testing,developed by theFraunhofer Institute).

Acceptance testing of aRoller Slewing Ring.

The delivery of a Roller Slewing Ringof over 5 m / 16.404 ft in diameter foran overseas crane (seaworthy packing).The wide-load transportation requiredpolice escort.

Qu

ali

ty A

ssu

ran

ceQ

uali

ty A

ssu

ran

ce

IMO Slewing Rings have to meetthe highest quality requirements

because they are often used assafety critical machine components.

Development, design, calculation,manufacturing and sales at our

Headquarters in Germany areperformed strictly according to

DIN EN ISO 9001 certifiedprocedures.

“We want you tobe satisfied”

Qu

ali

ty A

ssu

ran

ceQ

uali

ty A

ssu

ran

ce

500/

B82

39/U

/DV

/US/

Jan

11

www.goimo.comAll contact details of our global partnersare to be found at: www.goimo.com

Plant I, Gremsdorf, Germany

Plant II, Gremsdorf, Germany

Plant III, Summerville, SC, USA

IMO Group of Companies

USAIMO USA Corp.101 Innovation DriveMcQueen ParkSummerville, South Carolina 29483, USATel. +1 843 [email protected]

Environmental TechnologiesMachine- and Plant ManufacturingIMO Anlagenbau GmbH & Co. KGImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-50Fax +49 9193 [email protected]

Slew DrivesIMO Antriebseinheit GmbH & Co. KGGewerbepark 16, 91350 Gremsdorf, GermanyTel. +49 9193 6395-20Fax +49 9193 [email protected]

Slewing Ringsfor Renewable EnergyIMO Energy GmbH & Co. KGImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-30Fax +49 9193 [email protected]

Slewing RingsIMO Momentenlager GmbH & Co. KGImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-40Fax +49 9193 [email protected]

Central ServicesIMO Holding GmbHImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-0Fax +49 9193 [email protected]

Slewing Ring - IMO

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