SKF Precision rail guidesprmeh.ru/.../linear_motion/guiding/4183_e_precision_rail_guides.pdf · LWR...

SKF Precision rail guides

Linear Motion

The SKF Group

The SKF Group is an internationalindustrial corporation of AB SKF Sweden, founded in 1907, operat-ing in 130 countries. The companyhas some 45000 employees andmore than 80 manufacturing facili-ties throughout the world. Its international network is support-ed up by nearly 20000 distributorsand retailers. SKF is the worldleader in the rolling bearing busi-ness.Bearings, seals and special steelsare SKF’s main product areas. Inaddition, they also manufactureand sell, other industrial precisioncomponents and products.

© Copyright SKF 1992The contents of this catalogue arethe copyright of the publishers andmay not be reproduced (evenextracts) unless permission is gran-ted. Every care has been taken toensure the accuracy of the infor-mation contained in this cataloguebut no liability can be accepted forany errors or omissions.

Earlier catalogues the data in whichdeviate from those given here, arerendered invalid.The right is reserved to makechanges necessitated by technolo-gical developments.

Catalogue n° 4183 E 47173 · 3000 · 2000-01

Printed in Germanyby Weppert GmbH & Co. KG

SKF Linear Motion

One of these industrial precisionproducts assortment is manufac-tured and sold by the SKF LinearMotion Division.This unit has some 700 employees,6 manufacturing facilities, 3 prod-uct lines. One of the division’sstrengths is its ability to serve themarket through its organizationbased on 11 specialized SalesCompanies located in Europe andNorth America; however productavailability and product applicationsupport is provided word-wide bythe SKF international network.

The Linear Motion product rangecovers:• High Efficiency Screws• Linear Guiding Systems• Electromechanical Actuators

CD-ROM “Designer”

All linear Motion products are avai-lable in this CD, in DWG and DXFfiles.Thanks to “Designer”, you caneasily copy the drawing of the product you need into your owndesign drawing. If you are inte-rested, please do not hesitate tocontact your local SKF sales orga-nization. It is free of charge.

Linear Motionspecialized companies

SKF Bearing companieswith Linear Motionspecialized salesforce

Manufacturing facilities

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Product review

Product range

Technical information

LWR rail guides

LWRE rail guides

LWRM/LWRV rail guides

LWRPM/LWRPV rail guides

LWM/LWV rail guides

LWML/LWV rail guides

LWN/LWO rail guides

LWW/LWZ flat rail guides

LWJ/LWS flat rail guides

Special rail guides and slide units

2

SKF precision rail guides

Introduction

As world leader in the manufacture ofrolling bearings, SKF supplies practic-ally every kind of bearing for rotationaland linear motion.

SKF is therefore in a position tomeet almost any customer require-ment both technically and economi-cally.

This catalogue covers the SKF range of precision rail guides and accessories.

SKF precision rail guides are preci-sion products for linear motion andare therefore ideally suited for usewith in wide variety of machine tools,work centres, handling systems, special machinery, measuring andtest equipment.

The “Modular range” has intro-duced a new concept to the market ofinterchangeability of all the well knownguidance systems including the highcapacity LWRE type guides. This matrix range of rail guides is suitablefor almost every area of application.

SKF precision rail guides are avail-able in many different designs, sizesand standard lengths, incorporatingball, roller or needle roller assembliesand plain bearings. Suitable accesso-ries are also available for attachmentand sealing.

The use of SKF precision rail guidesfacilitates the construction of econo-mical, clearance-free linear guides ofpractically any type and length,according of the building block prin-ciple. The characteristics of the guidesinclude:

– a constant, high degree of runningaccuracy

– low-friction stick-slip-free operation– high speed of travel– low heat generation– low friction and high reliability– high stiffness– excellent load carrying capacity

For applications where high acce-lerations occur or where strokes areshort and of high frequency, SKF railguides with dry sliding liners are re-commended.

These guides are also suitable formachine tool applications where thegood damping properties of these

plain bearing guides is of greater im-portance than the lower friction of therolling element rail guides. For thoseapplications where rail guides, for in-stance because of their limited travelare unsuitable, SKF can supply alter-native forms of linear guidance systems. If you would like further de-tails, please contact SKF for technicaladvice. We will be pleased to providethe required information without obligation and at no cost, or to pre-pare a technical proposal.

This catalogue brings together allthe basic data which we consider tobe of interest. For additional informat-ion we recommend the SKF TechnicalHandbook, No. 4185 on Linear guid-ance systems which contains sec-tions on the selection, application,operational life, mounting and main-tenance of SKF precision rail guides.For further specialised advice pleasecontact your nearest SKF sales office.

All data in this catalogue is basedon 1992 design and manufacturingstandards.

Earlier publications, the data inwhich deviates from that given here,are rendered invalid.

We reserve the right to make anynecessary technical changes to theinformation contained herein.

In this catalogue the units used arein accordance with the international SIsystem. Conditions of delivery andpayment are generally based on thoseruling at the time of delivery.

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Product review ................................................................................................. 4

Product rangeModular Range .................................................................................................. 6Other products .................................................................................................. 10

Technical dataAccuracy of rail guides ...................................................................................... 11Grading of rail guides ........................................................................................ 12Accuracy of adjacent parts................................................................................ 13Selection of rail guides ...................................................................................... 13

Modular Range rail guidesTablesLWR rail guides with crossed roller and ball assemblies................................... 14LWRE rail guides with crossed roller assembly ................................................. 20LWRM/LWRV rail guides with needle roller assembly ....................................... 25LWRPM/LWRPV rail guides with dry sliding liner .............................................. 29

Other rail guidesTablesLWM/LWV rail guides with needle roller assembly ............................................ 33

without tablesLWML/LWV rail guides with needle roller unit and adjustment wedges ............ 37LWN/LWO rail guides with needle roller units.................................................... 38LWW/LWZ flat rail guides with roller unit ........................................................... 39LWJ/LWS flat rail guides with needle roller assembly ....................................... 40

Special rail guides and slide units.................................................................. 41

Contents

4


Product review

SKF Modular Range rail guides

LWRPM/PV

LWR

LWRM/V

LWRE

LWR

5

Product review

Other products

LWMW

LWU

LWF/G

LWDW

LWR 6Sonder

LWR 6Sonder

6


Product range

SKF Modular Range rail guidesThe SKF Modular Range consists of amatrix range of rail guide moduleswhich enable an individual choice ofcombinations of rails and rolling ele-ment assemblies. Different require-ments for the guides do not call forchanges in the design or mechanicalenvironment. The choice of appropri-ate rail guides is determined solely bythe mechanical conditions underwhich the guide system is to operate.The operating requirements are covered by five different models (fig 1)which may be defined as rail guideswith:– crossed roller cage assemblies of

the standard LWR series

– ball cage assemblies of the LWR series

– crossed roller cage assemblies ofthe optimised LWRE series

– needle roller cage assemblies ofthe LWRM/LWRV series

– slideway liners of theLWRPM/LWRPV series

7

Increased performance achievablewithout design modificationThe Modular System is based on thewell-proven LWR design which coversa wide range of applications. The newoptimised LWRE series offers eitherdoubled stiffness and a load carryingcapacity increased by a factor of fiveor, alternatively, for a given load carry-ing capacity, a 50 % reduction inbearing size compared with the standard LWR design (fig 2).

carried out simply and with the mini-mum of delay.

Above all, where the user needs toincrease machine performance, a unitwith a higher load rating can be fitted.In-situ replacement is made easier bythe fact that no new attachment holesor fixing devices are required whenusing rail guides of the Modular Range. An additional advantage is theworld-wide availability through distri-butors, simply by quoting the appro-priate catalogue number. The internaldesign of the LWRE Series assures in-creased operational life through theeven distribution of load. This resultsfrom the optimisation of the cross-section, enabled through the use oflarger rolling elements. The new de-sign allows a significant improvementin the roller/raceway contact perfor-mance. An important additional bene-fit from the updating programme isthe introduction of the practicallymaintenance-free cage made of POMwhich matches are stringent demandsfor long operational life of the rollingelements and maintains is dimensio-nal stability up to +80 °C. The indivi-dual rollers are well covered and thespace between the rails is almost filled, thus providing good protectionagainst contamination. A special cha-racteristic of these cages is that theyconsist of ‘snap-on’ elements and canbe adapted to suit individual needs(fig 3). Conventional crossed roller cages have their rollers arranged alternately evenly spaced, so that onlyhalf the rollers in a preloaded guideare load-bearing while the remainderact as idlers. In the new LWRE cagethese essentially unused rollers cabbe partially turned in the direction ofthe load. For this purpose each indivi-dual cage segment is designed to beturned through 90° about the longitu-dinal axis. These are manual adjust-ments and no special instructions arerequired when ordering from the cata-logue.

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Complete rangeIn order to simplify the application ofModular Range of rail guides even easier, all guides within a given sizerange have the same external dimen-sions and thus fit the space require-ments of most commercially availablerail guides. This results in a very wide choice in terms of load carryingcapacity, stiffness and operating cha-racteristics.

From the economical point of view,the use of the optimised LWRE Seriesoffers a double advantage. Firstly (although the initial cost is higher) therange of application is extended signi-ficantly as regards stiffness and loadcarrying capacity; this results in a bet-ter price/performance ratio. Secondly,the replacement of other rail guides,even those supplied by other manu-facturers and already installed, can be

Standard crossedroller configuration

Optionalconfigurations

LWR 12

LWRE 6

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The Modular Range of guide railsThe blue shaded areas in the chart indicate the sizes included in the Modular Range. Some 80 % of appli-cations can be covered by these (fig 4).

These standard, interchangeablerails of the Modular Range comprisemost of the currently available typeson the market (fig 5). The choice of aspecific rolling element or, for extremeconditions, of a slideway liner, is de-termined only by the actual operatingconditions (fig 6). Generally, any railguide can be operated in the ‘clamped’or ‘floating’ mode. The design of therail guides does not impose any special space requirements.

5

Commercially available products

SKF Modular Range

4

Type

Size

A x B

8.5 x 4 12 x 6 18 x 8 31 x 15 44 x 22 58 x 28 71 x 36 83 x 14 110 x 55

1 2 3 6 9 12 15 18 24

X

–

–

–

X

X

–

–

–

X

X

X

–

X

X

X

X

X

X

X

X

X

X

X

X

X

–

O

O

X

O

–

O

O

O

O

–

–

–

O

O

–

–

–

O

= Modular rangeX = available ex-stock in standard lenghtsO = available to order– = not available

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6

LWRE

Crossed roller

LWRPM/LWRPV

LWRM/LWRV

LWRBall

LWR seriesThis basic series of the Modular Range covers a wide range of appli-cations for linear bearings with limitedtravel. Where low friction is essential,ball cage assemblies are recommend-ed. If, on the other hand, high loadcarrying capacity is the chief require-ment, crossed roller assemblies are tobe preferred. The LWR series is manu-factured in nine sizes based on rollingelement dimensions.

LWRE seriesFor a given load carrying capacity, thedimension of the LWRE series are sig-nificantly less than those of the corre-sponding member of the LWR series.Thus, for instance, an LWRE 6 guidewith a cage length of 100 mm has agreater load carrying capacity than a standard LWR 12. The LWR 12 measures 58 x 28 mm whereas theLWRE 6 measures only 31 x 15 mm(fig 2).

LWRM/LWRV seriesThese guides are used principallywhere high load carrying capacity iscalled for in combination with highstiffness, for instance on grinding machines. This series is fitted withneedle roller and cage assembliesconsisting of two rows of needle rollers at right angles to each other.

LWRPM/LWRPV seriesWhere short strokes of high frequencyoccur, this version with sliding liners isan essential alternative to those withrolling bearing assemblies. In the caseof balls or rollers subjected to hightransverse acceleration, pitting of thetracks may occur as a result of theunfavourable tribological conditions.Sliding rail guides are preferred insuch circumstances. The liner materialis based on PTFE and is bonded on tothe unhardened LWRPM rail guideand then ground to the correct dimen-sion.

These wear-resistant guides arecharacterised by their stick-slip-free,vibration-damping running properties,at the same time offering excellentstiffness and emergency running pro-perties. These guide rails are largelyunaffected by dirt, coolants and lubri-cants.

Materials and precisionThe rails of the Modular Range guidesare manufactured from tool steel 90 MnCrV 8 with a hardness of be-tween 58 and 64 HRC. If required bythe application, the rails can also besupplied in special stainless steel, e.g. X 90 CrMoV 18 in all standard di-mensions. The rolling elements aremade from carbon chromium steel100 Cr 6 with a hardness of between58 and 64 HRC. The parallelism of theraceways is divided into three clas-ses. Class P10, with a maximum de-viation of 10 µm per 1000 mm length,meets most of the demands for nor-mal machinery. Where greater preci-sion is required, tolerance classes P5and P2 are also available.

The range is complemented by various accessories specially de-signed for the Modular Range of guide rails. These include end pieceswith or without wipers, also specialmounting screws.

Computerised Modular Range dataData relating to the Modular Range ofrail guides is also included in the LinCAD software program.

LinCAD consists of a selection anda graphics program, enabling thechoice of rail guide and of its incorpo-ration into a drawing.

LWR

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Other productsIn addition to the Modular Range, the selection of SKF products also includes a wide variety of rail guidesand rolling elements.

LWM/LWV rail guides(see table on pages 34 – 36)LWM/LWV rail guides differ from theLWRM/LWRV guides of the ModularRange only in their external dimen-sions. The internal geometry is identi-cal and the same needle roller assem-blies are therefore used.

In contrast to the LWRM/LWRV(two series) the LWM/LWV guidescomprise 6 series up to size of A x B = 80 mm x 50 mm. LWM/LWVrail guides are supplied as standardwith holes of type 15, namely through holes with counterbore. If for designreasons, it is necessary to screw bothrails from the same side, then one ofthe rails should have holes of type 13,i. e. with thread insert.

LWML rail guides(no table)The LWML rail guide consists of amodified LWM rail guide with the addi-tion of an adjustment wedge. Used inconjunction with an LWV unit and aneedle roller assembly this providesan adjustable rail guide. The inclina-tion of the wedge surface is 1,5 % sothat a displacement of the wedge by 1 mm brings about a 15 µm alterationin the height.

LWM/LWV rails are supplied asstandard with holes type 15 or, if re-quired, with holes of type 13, i. e. withthread insert.

LWML rails can be supplied to tolerance classes P10 and P5.

The LWML rail guides, as well asthe appropriate needle roller assemb-lies and end pieces, are made to order.

Because of the many permutationsavailable, each par of an LWML/LWVrail guide system must be ordered separately, e. g.:

1 rail LWML 552004001 rail LWM 402004002 rails LWV 40200400

2 end pieces LWEML 40202 end pieces LWEM 4020

It should also be stated whetherthe holes are required for right-handor left-hand mounting.

LWN/LWO rail guides(no table)LWN/LWO rail guides differ from theLWM/LWV rail guides only in theirheight, width and attachment holes.The internal geometry is identical tothat of the LWM/LWV types, i. e. theyhave the same load rating.

LWN/LWO rail guides are availablein tolerance classes P10, P5 and P2to order.

LWW/LWZ flat rail guides(no table)LWW/LWZ flat rail guides are used inconjunction with LWR rail guides forthe construction of slides. LWW/LWZflat rail guides and the appropriate rolling bearing assemblies and endpieces are made to order.

LWJ/LWS flat rail guides(no table)LWJ/LWS flat rail guides are used inconjunction with LWRM/LWRV,LWM/LWV or LWN/LWO rails as non-locating rail guide assemblies. Theyare used in the construction of slides.

LWJ/LWS flat rail guides, as well asthe appropriate rolling bearing as-semblies and end pieces are availableto order.

Special rail guides and recirculatingroller guidesIn addition to the standard rail guidesincluded in this catalogue, SKF alsomanufactures flat rail guides with recirculating roller assemblies as wellas special rail guides to customers’own drawings for such applicationsas machine tools, handling systemsand robotics.

Further information on these specialversions and their availability will besupplied on request.

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Technical data

Precision of rail guidesSKF precision rail guides, regardlessof type, are available in the same tolerance grades as indicated below.

Raceway accuracyTo meet the different requirements interms of precision of linear bearing arrangements, the rails are producedin three different tolerance classes.These are classified according to theparallelism between the raceways andthe support surfaces A and B (fig 7).

P10Tolerance class normal. This meetsthe requirements of general engineer-ing applications. The deviation fromparallelism for a 1000 mm long rail isapproximately 10 µm. See also adjac-ent table 1.

P5 This corresponds to the normal pre-cision requirements for machine toolapplications. The deviation fromparallelism for 1000 mm long rail isapproximately 5 µm. See also adjac-ent table 1.

P2Higher accuracy than P5 for the mostexacting demands in terms of accu-racy of a linear guidance system.Rails made to this tolerance classshould only be used when the asso-ciated components can be made to acorrespondingly high degree of preci-sion. Rails to tolerance class P2 willbe manufactured by SKF to specialorder, the maximum available lengthbeing 1000 mm. The deviation fromparallelism for a 1000 mm long rail isapproximately 2 µm.

If no mention is made of the requi-site accuracy on the order, rails madeto normal P10 tolerances will be sup-plied.

Dimensional accuracySKF rail guides with limited travel areproduced to the following tolerances(figs. 8 and 9):

Width A: 0/-0,3mmAbutment heightT = B1 + B2 ± 0,02 mmRail height B: 0/-0,2 mmRail length L: ± 0,001 · L mm

For rails composed of two or moresections the tolerance for the totallength is ± 2 mm.

7

Permissible deviation in parallelism between surfaces A and B

Rail length Tolerance classfrom to P10 P5 P2

mm µm

100 2 1 1

100 200 3 1 1

200 300 4 2 1

300 400 5 2 1

400 500 6 3 1

500 600 7 3 2

600 700 8 4 2

700 800 8 4 2

800 900 9 5 2

900 1000 9 5 2

1000 1200 10 6

1200 1400 11 6

Table 1

SKF precision rail guides for recir-culating roller assemblies are pro-duced to the following tolerances:

Width A: 0/+0,1 mmHeight A: 0/+0,1 mmLength L: 0/+0,002 · L mm

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GradingPrecision rail guides are generally mounted in pairs. In order to obtainthe same assembly width A andheight T (fig 8) the rails are gradedand supplied in pairs.

This ensures that any two similarrail guides in a system will have thesame height. The grading accuracy isalways within the appropriate toler-ance class for the parallelism.

If two or more rolling element assemblies are to be mounted imme-diately behind each other in a rail gui-de, the rolling elements must have thesame tolerance grade. On request,graded rolling element assembliescan be supplied.

Rails of the same profile for recir-culating roller assemblies, which areto be mounted immediately adjacentto each other or immediately behindeych other should be ordered spe-cially. These will be graded in heightor in height and width depending onthe design and then delivered as asingle package.

Built-up rail guides are always matched so that it is not necessary to request this when ordering.

Tolerance of interval between holesThe maximum deviation in the intervalbetween holes measured from centreto centre is ± 0,8 0/

00 of the rail lengthL for one-piece rails (fig 9). The toler-ance for built-up rails is also ± 0,8 0/00

but related to the length of the longestsection. Rails having tighter toleran-ces for the interval between holes canbe supplied on request.

Marking of matched setsMatched components are marked withconsecutive numbers as indicated infig 9a.

8

9 a

9

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Accuracy of adjacent componentsAn important criterion for the correctperformance of a rail guide system isthe accuracy of the associated com-ponents. The higher the demands foraccuracy of guidance and for smooth,easy operation, the greater the atten-tion which must be paid to the accu-racy of form and position of the asso-ciated components. Generally thesame accuracy requirements shouldbe applied to these components as tothe rail guides themselves. The adjac-ent table shows the values, for eachtolerance class, of the surface rough-ness, rectangularity and parallelism ofthe adjacent components.

To assure an even load distributionover the roller length, the maximumdifference in height of the supports fora rail guide should not exceed

∆h = 0,1 · B1

where∆h = Maximum height deviation, µmB1 = mean distance between two

rail guides, mm

To obtain good support for the railson the associated components theattachment holes should be carefullydeburred (figs 10 and 11).

Selection of a rail guide for limited travelWhen selecting a rail guide for limitedtravel, the length of travel, load carry-ing capacity, requisite life and stiffnessare governing factors. Other factorsare also important, including the requisite speed of travel, lubrication,operating temperature, ease of move-ment, environmental influences andcertain design constraints, for in-stance whether “clamped” or “floa-ting” guidance is required.

The most important considerationswhen selecting the size and length ofthe rolling element assembly are loadcarrying capacity, life and stiffness.

For light, centrally acting loads andmoderate demands for speed of tra-vel, it is possible to use practically allthe types of guides listed in this cata-logue. However, technical and eco-nomic reasons often dictate the choice

of the most appropriate model for agiven application.

In selecting the length of a rail guide and of the individual rails, thetravel as well as the load carrying capacity and the main factors, thelength of the cage assembly beingchosen to give the requisite life.

The following relationships serve as guidelines in making such calcula-tions:For a given length to travel:

Cage length = stroke, at least

For a given cage length:

Rail length = cage length+ 0,5 x stroke

For a given rail length and stroke, thecage length is given by:

Cage length = Rail length– 0,5 x stroke

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Accuracy of form of support surfaces

Characteristic Symbol for Permissibledeviation of form

Charac- Tolerance Dimensions Tolerance classteristic zone

P10 P5 P2

Roughness Ra a µm 1,6 0,8 0,2

Perpendicularity ⊥ t1/t2 µm/mm 0,3 0,3 0,3

Parallelism ⁄ ⁄ t3/T4 µm depending on theguide length L. (mm)3 2 1 2006 4 2 50010 6 3 1000

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LWR Precision rail guides

LWR rail guides are well-proven, limited-travel, linear guides used innumerous applications. They consistof two identical rails between whichcrossed roller assemblies or ball as-semblies are inserted, depending onthe application.

LWR rail guides with crossed rollerassembly are robust linear bearingswith high load carrying capacity. Theirspecial characteristics make themsuitable for a large proportion of linearbearing arrangements with limited travel.

LWR rail guides will ball assemblycan be used to advantage where loads are light and easy running is required.

Rails with a length greater than1200 mm are supplied in sections.

Because of the many permutationsavailable, each part of an LWR railguide system must be ordered sepa-rately, e. g:

4 rails LWR 906002 crossed roller cage assemblies

LWAL 9 x 258 end pieces LWERB 9

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Ball and crossed roller assembliesfor LWR rail guides

Ball assembliesWhere moderate loads are to be sup-ported by a rail guide and greater priority is given to smooth operationand low friction, the use of ball assemblies is recommended.

LWJK ball assemblies are providedwith a plastic ball-retaining cage. These are available for sizes 1 to 12,the cages for sizes 6 and upwardsbeing reinforced with steel wire.

LWJJ ball assemblies with brass cage are available in sizes 1 to 24. For sizes 6 to 12, the balls are retained through staggering or theapertures.

Crossed roller assembliesWhere greater stiffness is required,crossed roller assemblies are recom-mended. Various cage types are avail-able, depending on the size of the rollers.

LWAK crossed roller assemblies are fitted as standard with a plasticcage to retain the cylindrical rollers.

From size 3 upwards, metal cagesare also available:LWAA crossed roller assemblieswith retained rollers in pressed steelcage for sizes 3 and 15.

LWDD crossed roller units with non-retained cylindrical rollers and brasscage are available from size 3 to 24.

LWAL crossed roller assemblies are available in sizes 6 to 12 with alu-minium cages. In this case the rollersare retained. An overview of the vari-ous rolling element assemblies will befound on page 18.

End pieces for LWR rail guidesEnd pieces prevent the drift of the cage away from the loaded zone.

LWERA end piecesfulfil these requirements in low-loadconditions combined with horizontalmounting.

LWERB end pieces should be usedfor high loads and vertical mounting.

LWERC end pieces have the additi-onal feature of a felt wiper with sealinglip to keep the track free from dirt.

All end pieces are supplied withattachment screws.

LWGD special attachment screwscan be used for all rails within the Modular Range.

SKF Modular RangeThe LWR rail guides form the basis forthe whole Modular Range system. Inthis catalogue all guides with designa-tions commencing LWR... are inter-changeable with each other within agiven dimension series. All externaland attachment dimensions corre-spond with those of the LWR series.

LWR rail guides are available in antotal of nine sizes. Within the “ModularRange” sizes 3, 6 and 9 are includedwhich, according to experience, cover80 % of the normal market require-ments. To enable prompt delivery fromstock, certain standard rail lengthshave been defined.

Please refer to the tables for furtherdata on the Modular Range of rail guides. Further information can alsobe found on pages 6 to 9.

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LWR rail guidesLWR 1 – LWR 24

Designation Dimensions:System Monting holes End face holes Available lenghts

A B A1 Dw J J1 J2 G G1 N N1 J3 G2 G3 L1)

mm 020 030 040 045 050 060 070 075 080

LWR 1 8,5 4 3,9 1,5 10 5 1,8 M2 1,65 3 1,4 1,9 M1,6 2

LWR 2 12 6 5,5 2 15 7,5 2,5 M3 2,55 4,4 2 2,7 M2,5 3

• •

• •

• • •

• •º º

Designation Dimensions:System Mounting holes End face holes Available lengths


mm 050 075 100 125 150 175 200 225 250

LWR 3 18 8 8,3 3 25 12,5 3,5 M4 3,3 6 3,2 4 M3 6

LWR 6 31 15 13,9 6 50 25 6 M6 5,2 9,5 5,2 7 M5 9

LWR 9 44 22 19,7 9 100 50 9 M8 6,8 10,5 6,2 10 M6 9

LWR 12 58 28 25,9 12 100 50 12 M10 8,5 13,5 8,2 13 M8 12

LWR 15 71 36 31,9 15 100 50 14 M12 10,5 16,5 10,2 16 M8 12

LWR 18 83 40 37,4 18 100 50 18 M14 12,5 18,5 12,2 18,7 M10 12

LWR 24 110 55 49,9 24 100 50 24 M16 14,5 22,5 14,2 25 M10 12

º• •

•

• •

•

• • •

• •

•

•

º

º

1) Other lengths available to special order

17

Ball and crossed roller assemblies End pieces Special attachment screws

LWJK

LWJJ

LWAK

LWAA

LWAL

LWDD

LWERA 1+2

LWERA 3–24

LWERB 3–24

LWERB 1+2 LWERB 1 LWERB 2

LWERC 3–24with wiper

LWGD

Ball and crossed roller assemblies End pieces1) Specialattach-mentscrews

090 100 105 120 135 150 LWJK LWJJ LWAK LWERA LWERB LWERC LWGD

•

•

•

•

•

•

•

•

•

•

Ball and crossed roller assemblies End pieces Specialattach-mentscrews

275 300 350 400 450 500 550 600 650 700 800 900 1000 LWJK LWJJ LWAK LWAA LWAL LWDD LWERA LWERB LWERC LWGD

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

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º ººº• • •

ºº

•

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SKF Modular Range.Preferred range, prompt deliveryPrompt deliveryAvailable to order

•

º•

Example: 4 LWR 3100 or 4LWR902002 LWJK 3 x 17 2LWLA9x108 LWERB 3 4LWERC9

18


Accessories for LWR rail guidesBall and crossed roller assemblies

For description and data relating to rolling element assemblies, see page 15

For calculation of the cage length, see page 13

Designation1) Dimensions Load ratings Appropriatefor 10 rolling elements rail guidedynamic static

Dw U U1 t t1 C C0

mm N

LWJK 1 1,5 3,5 0,5 2,2 1,4 305 170 LWR 1LWJJ 1 3,5 0,4 3 2,2 305 170LWAK 1 3,75 0,5 3 2,2 365 585LWJK 2 2 5 0,7 3,9 2,9 570 300 LWR 2LWJJ 2 5 0,7 4 3 570 300LWAK 2 5,5 0,7 4 3 540 680LWJJ 3 3 7 1 5 3.5 1 340 690 LWR 3LWJK 3 7 1 4,2 2,7 1 340 680LWDD3 7 1 5 3,5 1 320 1 600LWAK 3 7,5 1 5 3,5 1 320 1 600LWAA 3 7 0,5 5 3,5 1 320 1 600LWJJ 6 6 15 2,7 9 6 5 850 2 700 LWR 6LWJK 6 14 2,5 9 6 5 850 2 700LWAL 6 14,8 2,7 9 6 5 850 6 800LWDD 6 15 2,7 9 6 5 850 6 800LWJJ 9 9 20 4 14 9,5 14 000 6 100 LWR 9LWJK 9 20 3,5 14 9,5 14 000 6 100LWAL 9 20 4 14 9,4 17 000 18 300LWDD 9 20 4 14 9,5 17 000 18 300LWJJ 12 12 25 5 18 12 25 500 10 800 LWR 12LWJK 12 20 4 15,5 9,5 25 000 10 800LWAL 12 25 5 18 12 30 000 30 500LWDD 12 25 5 18 12 30 000 30 500LWJJ 15 15 35 5 20 12,5 41 500 17 000 LWR 15LWAA 15 31 1,2 20 12,5 50 000 56 000LWDD 15 35 5 20 12,5 50 000 56 000LWJJ 18 18 40 6 25 16 62 000 24 500 LWR 18LWDD 18 40 6 25 16 75 000 91 500

LWJJ 24 24 50 8 35 23 114 000 43 000 LWR 24LWDD 24 50 8 35 23 150 000 186 000

1) Cage to types printed in bold type are readily available from stock

LWJJ

LWJK

LWAK

LWAA

LWAL

LWDD

19

End pieces Special attachment screws

SWwidth across flats

LWGD

Designation Dimensions Appropriate Designation Dimensionsattachment Special

End pieces End pieces screw attachmentwith wiper L L1 screws G1 G2 L4 L5 D d SW2)

mm DIN 963 mm

LWERA 1 – 1 – M 1,6 – – – – – – – –LWERB 1 – 0,5 – M 1,6

LWERA 2 – 1,5 – M 2,5 – – – – – – –LWERB 2 – 0,5 – M 2,5

LWERA 3 – 2,5 – M 3 LWGD 3 M 3 5 12 3 5 2,3 2,5LWERB 3 – 2 – M 3 DIN 7991– LWERC 3 2 5 M 3

LWERA 6 – 3 – M 5 LWGD 6 M 5 8 20 5 8 3,9 4LWERB 6 – 3 – M 5 DIN 7991– LWERC 6 3 6 M 5 DIN 7991

LWERA 9 – 4 – M 6 LWGD 9 M 6 12 30 6 8,5 4,6 5LWERB 9 – 4 – M 6 DIN 7991– LWERC 9 4 7 M 6 DIN 7991





2) Width across flats of internal hexagon

LWERA 1+2

LWERA 3–24

LWERB 3–24

LWERB 1+2 LWERB 1 LWERB 2

racleur

LWERC 3–24with wiper

20


LWRE rail guides

LWRE rail guides are a logical deve-lopment of the proven LWR rail gui-des.

Within the Modular Range systemthe LWRE rail guides offer an out-standing price/performance ratio.Alongside the familiar characteristicsof the LWR series, the new LWRE railguides offer the advantages of a five-fold increase in the load carrying capacity and a doubling of the stiff-ness, achieved through optimised internal geometry in conjunction withlarger roller diameters.

LWRE rail guides offer a greatly increased safety margin, thus a verymuch smaller LWRE rail guide can beused in a given design space while

maintaining the same load carryingcapacity as the LWR.

The mounting and attachment dimensions of the LWRE rail guidesconform to those of all the SKF Modular Range rail guides includedin this catalogue.

Rail guides of more than 1200 mmin length should be built up of sections.

Because of the large number ofpossible combinations, each of thecomponents parts of LWRE rail guidesmust be ordered separately, e. g:4 rail guides LWRE 62002 crossed roller assemblies

LWAKE 6 x 134 end pieces LWERE 6

21

Crossed roller assemblies for LWRE rail guides

LWAKE crossed roller assembliesare fitted with a plastic cage with retained rollers.

The elements of the cage are as-sembled using a ‘snap in’ techniquewhereby each element can be rotatedmanually through an angle of 90°. Theload rating and stiffness can be en-hanced by this technique. Dimensionalstability of the LWAKE crossed rollerassembly is maintained up to a tem-perature of +80°C. The cage retainsthe rollers and at the same time almost fills the free space between

the rails, thus providing good protec-tion against the ingress of dirt.

End pieces for LWRE rail guidesEnd pieces serve to restrict the drift ofthe crossed roller assemblies awayfrom the loaded zone.

LWERE end pieces are generallyused for horizontal and vertical appli-cations.

LWEREC end pieces should be usedwhere it is necessary to reduce therisk of contamination of the raceways.These end pieces are fitted with a plastic wiper with a sealing lip.

All end pieces are supplied with appropriate fixing screws.

Special attachment screws for LWRE rail guidesFor designations and dimensionsplease refer to page 19. The LWGDspecial attachment screws listed inthe tables may be selected to suiteach size of LWRE rail guide.

Internal geometry of LWR and LWRE rail guidesNormal LWR rail guides utilise onlyabout 40 % of the roller length: Due toparallel displaced load direction forces on to the LWR rail guidesexerts an internal tilting moment onthe rollers. This can lead to high edgestresses and hence to a reduction ofload carrying capacity. LWRE rail guides, on the other hand, utilise thewhole roller length. The internal geo-metry is such that no tilting momentcan occur and there are no edgestresses. At the same time the diame-ter of the rollers has been considerablyincreased (+33%).These features provide the followingadvantages:– fivefold increase in load carrying

capacity– 100 % increase in stiffness

22


Designation: Dimensions:System Attachment holes End face holes Available lengths


mm 050 075 100 125 150 175 200

LWRE 3 18 8 8,7 4 25 12,5 3,5 M 4 3,3 6 3,2 4 M 3 6

LWRE 6 31 15 15,2 8 50 25 6 M 6 5.2 9,5 5,2 6,75 M 5 9

LWRE 9 44 22 21,7 12 100 50 9 M 8 6,8 10,5 6,2 9,75 M 6 9

LWRE rail guidesLWRE 3 – LWRE 9

• • •

•

• •

•

• •

•

•

1) other lengths available to order

23

Crossed End pieces Specialroller attachmentassemblies screws

225 250 275 300 350 400 450 500 550 600 650 700 800 900 1000 LWAKE LWERE LWEREC LWGD

•

•

•

•

•

•

•

•

•

•

•

•

º º º ºº º º º º º º

Crossed roller assemblies End pieces Special attachment screws

• •

• • •

•

SKF Modular RangePreferred range, prompt deliveryPrompt deliveryspecial order

•

º•

Ordering example: 4 LWRE 904002 LWAKE 9 x 224 LWERE 9

16 LWGD 9

• • º º º

LWAKE LWERE

wiper

LWERECwith wiper

LWGD

24


Accessories for LWRE rail guides

Crossed roller assemblies

LWAKE

For description and data on crossed roller assemblies, please see page 21

Designation Dimensions Load ratings Rail guide for 10 rollers designationsper rowdynamic static

Dw t t1 t2 C C0

mm N

LWAKE 3 4 6,25 2,65 3,6 6 300 8 500 LWRE 3

LWAKE 6 8 11 5 3,6 39 000 39 000 LWRE 6

LWAKE 9 12 16 8,65 3,6 78 000 78 000 LWRE 9

End pieces Special attachment screws

LWGD

Designation Dimensions Appropriate Rail attachment guide

without with screw designationwiper wiper L L1

mm DIN 7991

LWERE 3 2 M 3 LWRE 3

LWEREC 3 4 M 3 LWRE 3





for designation and dimensionssee page 19

LWERE LWEREC

25

LWRM/LWRV rail guides

LWRM/LWRV rail guides offer railguide systems with high load carryingcapacity and maximum stiffness.

Needle roller assemblies forLWRM/LWRV rail guides

LWHV needle roller assemblies con-sisting of a plastic cage with retainedneedle rollers, are available for railguides of sizes 6 and 9. The elasticconnection between the two cagesections for the two roller rows en-ables the cage to bend to any angle.

LWHW needle roller assemblies have aluminium cages with provideretention of the needle rollers. Theyare available for size 9 units.

When ordering, the appropriate cage length in mm should be statedafter the cage designation, e. g:LWHV 10 x 225.

End pieces for LWRM/LWRV railguidesEnd pieces serve to restrict the drift ofthe needle roller assemblies awayfrom the loaded zone.

LWERM and LWERV end pieces are suitable for both horizontal andvertical applications.

LWEARM and LWEARV end piecesare fitted with a plastic wiper with asealing lip which serves to reduce therisk of contamination of the raceways.

All end pieces are supplied with theappropriate attachment screws.

The mounting and attachmentdimensions of the LWRM/LWRV railguides conform to those of all theSKF Modular Range rail guides included in this catalogue.

Because of the large number ofpossible combinations, all the com-ponent parts of LWRM/LWRV rail guides must be ordered separately,e.g:

2 rail guides LWRM 904002 rail guides LWRV 904002 needle roller assemblies

LWHW 15 x 3582 end pieces LWERM 9

26


Designation1) Dimensions:System Attachment holes End face holes

A B A1 A2 A3 Dw J J1 J2 G G1 N N1 J3 J4 J5 J6 G2 G3

mm

LWRM 6 31 15 16,5 – – 2 50 25 6 M 6 5,2 9,5 5,2 8,6 7 – – M 3 6

LWRV 6 31 15 – 17,8 10,8 2 50 25 6 M 6 5,2 9,5 5,2 – – 7 6 M 3 6

LWRM 9 44 22 23,1 – – 2 100 50 9 M 8 6,2 10,5 6,2 10 11 – – M 5 8

LWRV 9 44 22 – 26,9 16,6 2 100 50 9 M 8 6,2 10,5 6,2 – – 10 6 M 5 8

LWRM/LWRV rail guidesLWRM/LWRV 6 and LWRM/LWRV 9

1) rails of designations LWRM/LWRV 12 and 15, and other lengths available to order2) needle roller assemblies with steel cages also available to order

LWRM

LWRV

27

Available lengths Rolling End pieces Sepcialelement assemblyassemblies screws

L1)

100 150 200 250 300 350 400 500 600 700 800 900 1000 LWHV LWHW LWERM LWEARM LWERV LWEARV LWGD

•

•

• •

••

•

• •

•

• •

• •

ºº

ºº

ºººº

ººº º

ººº

ººº

•

Rolling element assemblies End pieces Sepcial assembly screw

SKF Modular RangePreferred range, prompt deliveryPrompt deliveryTo special order

•

º•

Ordering example: 2 LWRM 906002 LWRV 906002 LWHV x 4504 LWERM 9

•

•

• •

•

•

•

•

•

•

•

•

•

•

•

• •

••

–2)

–2) – –

– –

– –

– –

•

•

•

•

LWHW Aluminium

LWHV Plastics

LWERV

wiper

LWEARVwith wiper

LWERM

wiper

LWEARMwith wiper

LWGD

28


Accessories for LWRM/LWRV rail guides

Needle roller assemblies

For description and data on needle roller assemblies, please see page 25

Designation Dimensions Load ratings Rail guidefor 10 needle rollers designationper rowdynamic static

Dw Lw t t1 t2 C C0

mm N

LWHV 10 2 4,8 10 3,75 2,7 10 400 25 500 LWRM 6/LWRV 6*

LWHV 15 2 7,8 15 3,75 2,7 16 300 45 000 LWRM 9/LWRV 9

LWHW 15 2 7,8 15 4,5 3,4 16 300 45 000 LWRM 9/LWRV 9

* needle roller assemblies with steel cages also available to order

End pieces Special attachment screw

LWGD

Designation Dimensions Appropriate Rail attachment guide

without with screws designationwiper wiper L L1

mm

LWERM 6 4 M 3 DIN 84 LWRM 6

LWERV 6 4 M 3 DIN 84 LWRV 6

LWEARM 6 6 M 3 DIN 84 LWRM 6

LWEARV 6 6 M 3 DIN 84 LWRV 6

LWERM 9 6,3 M 5 DIN 84 LWRM 9

LWERV 9 6,3 M 5 DIN 84 LWRV 9

LWEARM 9 8,3 M 5 DIN 84 LWRM 9

LWEARV 9 8,3 M 5 DIN 84 LWRV 9

for designation and dimnesionssee page 19

LWHV plastique LWHW aluminium

LWERM

racleur

LWEARM

LWERV

LWEARV

29

LWRPM/LWRPV rail guides

LWRPM/LWRPV rail guides are linearbearings for limited travel, with slide-way liners made in Turcite-B®1).

This material, based on PTFE, isself-lubricating and possesses excel-lent sliding properties.

The dry sliding liner is attached tothe unhardened LWRPM rail with adhesive and the surface is then gro-und. In order to avoid damage to thesliding surface, the leading edges ofthe LWRPV rails are slightly rounded.Dimensions of these rails are the sa-me as those of the LWRV series.LWRPM/LWRPV rail guides should beused where, because of external influ-ences, rail guides incorporating rollingelement assemblies are unsuitable.

Such applications include thosewhere high shock loads occur whichcould cause indentation of the rollingelements in the raceways, or whereextremely short strokes are required.The unfavourable tribological condi-tions produced by such operationwould give rise to raceway pitting in arolling element rail guide.

The mounting and attachmentdimensions of the LWRPM/LWRPVrail guides conform to those of allthe SKF Modular Range rail guidesincluded in this catalogue.

LWRPM/LWRPV rail guides are characterised by:

– stick-slip-free operation– smooth running– good emergency running

properties– low wear and high reliability– insensitivity to contamination– very good vibration damping

propertiesWhen ordering, the individual com-

ponents of the rail guides should bespecified, e. g:

2 rails LWRPM 63002 rails LWRPV 6300

1) Turcite-B® is a registered trademark of Busak & Shamban GmbH

30


LWRPM/LWRPV rail guidesLWRPM/LWRPV 3 – LWRPM/LWRPV 9

Designation1) Dimensions:System Attachment holes

A B A1 A2 A3 J J1 J2 G G1 N N1

mm

LWRPM 3 18 8 9,5 – – 25 12,5 3,5 M 4 3,3 6 3,2

LWRPV 3 18 8 – 9,6 6,45 25 12,5 3,5 M 4 3,3 6 3,2

LWRPM 6 31 15 16,6 – – 50 25 6 M 6 5,2 9,5 5,2

LWRPV 6 31 15 – 17,8 10,8 50 25 6 M 6 5,2 9,5 5,2

LWRPM 9 44 22 23,1 – – 100 50 9 M 8 6,8 10,5 6,2

LWRPV 9 44 22 – 26,9 16,6 100 50 9 M 8 6,8 10,5 6,2

1) sizes LWRPM/LWRPV 12 and LWRPM/LWRPV 15, also other rail lengths are available to order.

LWRPM

LWRPV

31

SpecialAvailable lengths attach-

mentL1) screws

050 075 100 125 150 175 200 225 250 275 300 350 400 450 500 550 600 650 700 800 900 1000 LWGD

•

•

ºº

ºº

º ººº

º º º º º ººº º º ºº º º º

ºººº

ººº

•

•

•

• •

•

•

•

•

•

• •

••

•

•

•

•

• • • •

•

• •

• •

•

•

•

••

•

•

•

•

•

•

•

•

SKF Modular RangePreferred range, prompt deliveryPrompt deliveryTospecial order

•

º•

Ordering example: 2 LWRPM 64002 LWRPV 6300

Slide liners

The raceways of LWRPM rail guidesare provided with liners which areattached using adhesive and sub-sequently ground to size.

No special instructions are requiredfor ordering the liner material.

For more information, see page 32.

End pieces

Because of their design, rail guides ofthese series do not normally requirethe use of end pieces.

Special attachment screws

For designations and dimensions, see page 19.

32


Accessories for LWRPM/LWRPV rail guides

Designation1) Dimensions Load carrying Rail capacity2) guide

designationH C

mm N

LWRPM 3 0,7 300/100 mm LWRPV 3

LWRPM 6 1,7 700/100 mm LWRPV 6

LWRPM 9 1,7 1200/100 mm LWRPV 9

1) The sliding liners are parts of the LWRPM and do not require a special order.2) for a surface loading of approx. 1 N/mm2

(momentary loads of up to 6 N/mm2 are permissible).

End pieces

LWRPM/LWRPV rail guides, by virtue of their design, do not normally require end pieces.

For this reason, tapped holes on the end faces are also unnecessary.

However, for production reasons, LWRPV rail guides will in certain cases be supplied with end face tapped holes.

Special attachment screws

See page 19 for designations and dimensions.

LWGD

33

LWW/LWV rail guides

LWW/LWV rail guides enable the design of linear guidance systems forheavy loads with maximum stiffness.The internal geometry is identical withthat of the Modular Range rails of theLWRM/LWRV series. As the sameneedle roller assembly is used, the load bearing characteristics are alsothe same. The external dimensions ofthe LWM/LWV rail guides, however,differ slightly from those of theLWRM/LWRV Modular Range dimen-sions.

LWM/LWV rail guides find wide application in machine tools.

LWM/LWV rail guides have as standard attachment hole type 15, i.e.through hole with countersinking.

If attachment hole type 13 is or-

dered, corresponding threaded ins-erts are supplied along with the guide.

For new designs the choice ofLWRM/LWRV rail guides is recom-mended. These offer the advantageof being interchangeable with otherrail guides of the Modular Range.

Needle roller assemblies forLWM/LWV rail guidesLWHV needle roller assemblies havea plastic cage with retained needlerollers. The elastic connection be-tween the two cage sections for thetwo roller rows enables the cage tobend to any angle.LWHW needle roller assembliescomprise an aluminium cage withneedle rollers arranged at right angles

to each other. The needle rollers areretained by the cage.End pieces for LWM/LWV rail guidesEnd pieces serve to prevent drift ofthe cage away from the loaded zone.LWEM- and LWEV end pieces aresuitable for horizontally and verticallymounted rail guides.LWEAM and LWEAV end pieces have the addition of a plastic wiperwith a sealing lip which serves to keepthe track tree from dirt.

All end pieces are supplied to-gether with attachment screws.

Rail guides with a length of morethan 1200 mm should be made up ofsections. If, for design reasons,single-pieces rails are required, thesecan be supplied to special order.

34


LWM/LWV rail guidesLWM/LWV 3015 – LWM/LWV 8050

Hole type 15

Hole type 15

Hole type 13 Hole type 13

LMW rail

LWV rail

Designation Dimensions:System Attachment holes End face holes

A B A1 A2 A3 Dw J1) J1 min2) J2 G N N1 N2 J3 J4 J5 J6 G1 G2

mm

LWM 3015 30 15 16 – – 2 40 15 5,5 M 4 8,5 4,5 5,25 8 7 – – M 3 6

LWV 3015 30 15 – 17,2 10,5 2 40 15 5,5 M 4 8,5 4,5 5,25 – – 7 5,5 M 3 6

LWM 4020 40 20 22,5 – – 2 80 15 7,5 M 6 11,5 6,8 7,5 10 11 – – M 5 7

LWV 4020 40 20 – 22 13,5 2 80 15 7,5 M 6 11,5 6,8 7,5 – – 10,5 5,5 M 5 7

LWM 5025 50 25 28 – – 2 80 20 10 M 6 11,5 6,8 7,5 12 13 – – M 6 8

LWV 5025 50 25 – 28 17 2 80 20 10 M 6 11,5 6,8 7,5 – – 13 7 M 6 8

LWM 6035 60 35 36 – – 2,5 100 20 11 M 8 15 9 10 14 20 – – M 6 8

LWV 6035 60 35 – 36 120 2,5 100 20 11 M 8 15 9 10 – – 18 8 M 6 8

LWM 7040 70 40 40 – – 3 100 20 13 M 10 18,5 11 12,5 16 20 – – M 6 8

LWV 7040 70 40 – 42 24 3 100 20 13 M 10 18,5 11 12,5 – – 20 10 M 6 8

LWM 8050 80 50 45 – – 3,5 100 20 14 M 12 20 13 14 20 30 – – M 6 8

LWV 8050 80 50 – 48,5 26 3,5 100 20 14 M 12 20 13 14 – – 25 10 M 6 8

1) for lengths L < J + 2 · J1 min/J = 50 mm (except for LWM/LWV 3015)2) J1 depends upon the rail length and is of the same size at each end of the rail

J1 = L – ∑ J2

3) J = 35 mm

35

Needle roller End piecesAvailable lengths4) assemblies

100 150 200 300 400 500 600 700 800 900 1000 LWHV LWHW LWEM LWEAM LWEV LWEAV

•

•

• •

•

•

•

•

•

•

•

•

•

•

•

•

•

•

Rolling element assemblies End pieces

LWHV Plastics

LWHW Aluminium

LWEM

LWEAMwith wiper

wiper wiper

LWEV

LWEAVwith wiper

available from stockavailable to orderº

•

Ordering example: 2 LWM 4020002 LWV 40202002LWHW 15 x 1304 LWEAM 4020

4) other lengths available to order5) also available with steel cage to order

• • •

•

•

•

•

•

•

•

•

•

•

•

•

•

3)

3)

ºººººº

•

•

•

•

•

•

ºººººº

•

•

•

•

•

•

•

•

ºººººº

ºººººº

º ºººººººººººº

ºººººººººº




ººº

ºººº

ºº

5)

5)

•

•

•

•

•

•

•

º

º

º

•

•

ºº

º

º

•

•

•

º

º

º

º

º

36


Accessories for LWM/LWV rail guidesNeedle roller assemblies

LWHV Plastics LWHW Aluminium

For description and data on crossed roller assemblies, please see page 33.

Designation Dimensions Load ratings Railfor 10 needle rollers guide designationper row

Dw Lw U t t1 dynamic staticC C0

mm N

LWHV 10 2 4,8 10 3,75 2,7 10 400 25 500 LWM/LWV 3015*

LWHV 15 2 7,8 15 3,75 2,7 16 300 45 000 LWM/LWV 4020 + 5025

LWHW 15 2 7,8 15 4,5 3,4 16 300 45 000 LWM/LWV 4020 + 5025

LWHV 20 2,5 11,8 20 5 3,7 32 000 88 000 LWM/LWV 6035

LWHW 20 2,5 11,8 20 5,5 4,2 32 000 88 000 LWM/LWV 6035

LWHW 25 3 15,8 25 6 4,4 52 000 143 000 LWM/LWV 7040

LWHW 30 3,5 20 30 7 5,2 76 500 212 000 LWM/LWV 8050

* needle roller assemblies with steel cages also available for this size

End pieces

LWEM

wiper

LWEAM LWEV LWEAV

wiper

Designation Dimensions Appropriateattachment

without with screwswiper wiper L L1

mm

LWEM 3015 4 M 3 DIN 84

LWEV 3015 4 M 3 DIN 84

LWEAM 3015 6 M 3 DIN 84

LWEAV 3015 6 M 3 DIN 84

LWEM 4020 6,3 M 5 DIN 84

LWEV 4020 6,3 M 5 DIN 84

LWEAM 4020 8,3 M 5 DIN 84

LWEAV 4020 8,3 M 5 DIN 84

LWEM/LWEV 5025 à 8050 6,9 M 6 DIN 84

LWEAM/LWEAV 5025 to 8050 8,9 M 6 DIN 84

37

LWML rail guides

LWML rail guides consists of a modi-fied LWM rail guide with the additionof an adjustment wedge. In conjunc-tion with an LWV rail guide and aneedle roller assembly this results inan adjustable linear guidance system.The wedge has a slope of 1,5 % sothat a displacement of the wedge by 1 mm brings about a 15 µm alterationin height.

LWML rails are supplied as stan-dard with hole type 15, i.e. throughbored and countersink or hole type13, i.e. with threaded insert. They areavailable to tolerance classes P10 and P5. Multi-section rails cannot besupplied.

LWML rails with the appropriateneedle roller assemblies and end pieces are available to order.

I should also be stated at the timeof ordering whether the mounting holes are required for right-hand orleft-hand mounting.

38


LWN/LWO rail guides

LWN/LWO rail guides differ from theLWM/LWV rail guides only in height,width and attachment holes. The internal geometry of the two series isthe same and their load ratings areidentical.

LWN/LWO rail guides are suppliedto tolerance P10, P5 and P2 to order.

39

LWW/LWZ flat rail guides

LWW/LWZ flat rail guides are used inconjunction with LWR rail guides inthe construction of roller tables. These guides, with appropriate rollingelement assemblies and end piecesare available to order.

40


LWJ/LWS flat rail guides

LWJ/LWS flat rail guides are used incombination with LWRM/LWRV,LWM/LWV or LWN/LWO as non-locating rail guide assemblies in theconstruction of linear slides.

LWJ/LWS flat rail guides with appropriate rolling element assem-blies and end pieces are available toorder.

41

Special rail guides and recirculating roller assemblies

In addition to the standard rail guidesincluded in this catalogue, SKF alsosupplies flat rail guides for recircula-ting roller assemblies, also rail guidesto customers’ own drawings, for ins-tance for machine tool applications,handling systems and robotics.

Further information on special railguides and recirculating roller assemblies and their availability willbe supplied on request.

LWMW

LWR 6special

LWR 6special

LWU

LWDW

LWF/G

SKF sales companies

‰

AustraliaSKF AUSTRALIA PTY. LTDP. O. Box 301OAKLEIGH, Victoria 3166Phone: + 61 (3) 5 67 28 00Fax: + 61 (3) 5 67 28 88

AustriaSKF ÖSTERREICH AGIKANO BürogebäudePostfach 87A-2355 WIENER NEUDORFPhone: + 43 (22 36) 6 70 90Fax: + 43 (22 36) 6 70 92 20

BeneluxSKF MULTITEC BENELUX B. V.Kelvinbaan 16NL-3439 MT NieuwegeinPhone: + 31 306 029 029Fax: + 31 306 029 028Phone: (B) + 32 2 5024270Fax: (B) + 32 2 5027336

CanadaSKF CANADA LIMITED40 Executive CourtSCARBOROUGH, ONTARIOMIS 4 N 4Phone: + 1 (4 16) 2 99 12 20Fax: + 1 (4 16) 2 92 03 99

Czech RepublicSKF LOÎISKA A.S.P. O. Box 19U Mû‰tanského pivovaru 717004 PRAHA 7Phone: + 420 (0)2 66 19 71 11Fax: + 420 (0)2 66 71 04 15

DenmarkSKF MULTITECBramdrupskovvej 17DK-6000 KOLDINGPhone: + 45 - 75 52 95 77Phone: + 46 - 42 25 35 00Fax: + 45 - 75 52 95 66

FinlandSKF MULTITECPL 60FIN-02201 ESPOOPhone: + 3 58 94 52 97 54Fax: + 3 58 94 27 76 5

FranceSKF EQUIPEMENTS30/32 Ave. Des Trois PeuplesB. P. 83F-78185 SAINT QUENTINYvelines CedexPhone: + 33 (1) 30 64 28 28Fax: + 33 (1) 30 64 41 31

GermanySKF LINEARSYSTEME GMBHVerkauf DeutschlandHans-Böckler-Straße 697424 SCHWEINFURTPhone: + 49 (97 21) 6 57 - 0Fax: + 49 (97 21) 6 57 - 111

Great BritainSKF ENGINEERING PRODUCTS LTD.Sundon Park RoadLutonBEDFORDSHIRE LU3 3BLPhone: + 44 (15 82) 49 0049Fax: + 44 (15 82) 49 6574

Hong KongSKF CHINA LIMITEDUnit A 35/F. Manulife Tower169 Electric Road · North PointHONG KONGPhone: + 852 - 25 10 81 11Fax: + 852 - 25 10 73 68

HungarySKF SVÉD GOLYÓSCSAPÁGYRESZVENYTARSASAGCsata u. 25HU-2040 BUDAÖRSPhone: + 36 (23) 41 59 96Fax: + 36 (23) 41 59 28

ItalySKF MULTITEC S.p. A.Corso Vittorio Emanuele II, 94I-10121 TORINOPhone: + 39 (011) 57 17 61Fax: + 39 (011) 5 71 76 33

NorwaySKF MULTITEC A/SJerikoveien 141067 OSLOPostal address: Postboks 7Lindeberg GårdN-1007 OSLO 10Phone: + 47 (2) 2 30 71 70Fax: + 47 (2) 2 30 28 14

PolandSKF CENTRALA HANLOWO-TECHNICZNA SP. ZO.O.ul. Pulawska 30302-785 WARSZAWAPhone: + 48 22 549 4700Fax: + 48 22 549 4701

PortugalSKF PORTUGAL · Rolamentos Lda.Casal de Alfragide, Lote 1,AMADORAPostal address: Apartado 60141,P-2700 AMADORAPhone: + 35 (1) 4 17 36 36Fax: + 35 (1) 4 17 36 49 (general)

4 17 36 50 (sales)

SwedenSKF MULTITEC ABEkslingan 3HELSINGBORGPostal address: Box 222 48S-25024 HELSINGBORGPhone: + 46 (42) 25 35 00Fax: + 46 (42) 25 35 45, 25 35 46

SingaporeSKF SOUTH EAST ASIA &PACIFIC PTE. LTD.153 Gul Circle JurongSingapore 629610Postal Address:Jurong Point P. O. Box 445SINGAPORE 916415Phone: + 65 - 8 61 69 22Fax: + 65 - 8 61 10 11

SpainSKF PRODUCTOS INDUSTRIALES S.A.Apartado 769E-08080 BARCELONAPhone: + 34 (93) 3 77 99 77Fax: + 34 (93) 4 74 20 39/31 56

SwitzerlandSKF (SCHWEIZ)Eschenstraße 5CH-8603 SCHWERZENBACHPhone: + 41 (1) 8 25 81 81Fax: + 41 (1) 8 25 82 82

USASKF MOTION TECHNOLOGIES1530 Valley Center ParkwayUSA-BETHLEHEM, PA 18017Phone: + 1 (610) 861 - 4800Fax: + 1 (610) 861 - 4811

Linear Motion

SKF Linear Motion offers a wide range of precision engineered linear motion components, units and systems.In addition to comprehensive product literature and software, SKF offers assistance from experienced linear motionengineers.

Linear Motion has 3 product lines and a sales organisation based on 11 specialized sales companies located in Europeand in the USA.

However the product availability as well as the product application is world-wide granted by the SKF Bearing international network.To get any other SKF address all over the world, please contact one of the companies below.

SKF Guiding Systems

AustriaLinear MotionSKF Österreich AGPhone: +43 22 36 6709-0Fax: +43 22 36 6709-220

BeneluxSKF Multitec Benelux B.V.Phone: +31 30 6029029Fax: +31 30 6029028Sales Office Belgium/Luxembourg:Phone: +32 2 5024270Fax: +32 2 5027336

FranceSKF EquipmentsPhone: +33 1 30 64 28 28Fax: +33 1 30 64 41 31

GermanySKF Linearsysteme GmbHPhone: +49 9721 657-0Fax: +49 9721 657-111

ItalySKF Multitec S.p. A.Phone: +39 11 57 17 61Fax: +39 11 5 71 76 33

NorwaySKF Multitec A/SPhone: +47 22 30 71 70Fax: +47 22 30 28 14

SpainSKF Productos Industriales, S.APhone: +34 93 377 99 77

+34 93 377 99 07Fax: +34 93 474 20 39/31 56

Sweden/Denmark/FinlandSKF MultitecPhone: +46 42 25 35 00Fax: +46 42 25 35 45/46Sales Office DenmarkPhone: +45 75 51 95 77Fax: +45 75 51 95 66Sales Office FinlandPhone: +358 94 52 97 52Fax: +358 942 77 65

United KingdomSKF Engineering Products Ltd.Phone: +44 1582 490049Fax: +44 1582 496574

USASKF Motion TechnologiesPhone: +1 610 861-4800Fax: +1 610 861-4811

SKF Ball & Roller Screws SKF Actuators

Linear Motion

http://www.linearmotion.skf.com

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