OSPM Mini-Steering Unit · 2020. 9. 6. · The mini-steering unit is available with displacements...

Technical Information

SteeringOSPM Mini-Steering Unit

www.danfoss.com

http://www.danfoss.com

Revision history Table of revisions

Date Changed Rev

June 2020 Minor changes throughout 0506

Changed document number from 'BC00000091' to 'BC152886483654' XX

February 2020 Major update. 0501

March 2016 Updated to Engineering Tomorrow design 0403

2003-2016 First version/Various changes. AA-DB

Technical InformationOSPM Mini-Steering Unit

2 | © Danfoss | June 2020 BC152886483654en-000506

A wide range of steering componentsConversion factors........................................................................................................................................................................... 5Survey of literature on Danfoss steering components....................................................................................................... 5

Steering unit OSPMGeneral Introduction.......................................................................................................................................................................6Application..........................................................................................................................................................................................6Advantages.........................................................................................................................................................................................6Function...............................................................................................................................................................................................6Versions................................................................................................................................................................................................7

OSPM ON........................................................................................................................................................................................8OSPM PB......................................................................................................................................................................................... 9OSPM LS....................................................................................................................................................................................... 10

Code numbers.................................................................................................................................................................................11OSPM Open-center Non-reaction steering units.......................................................................................................... 11OSPM Power Beyond steering units.................................................................................................................................. 11OSPM Load Sensing steering units.................................................................................................................................... 11OSPMS side-ported steering units......................................................................................................................................11

Variants and ordering specifications...................................................................................................................................... 12Variants codes for OSPM, OSPMS, OSPMC, and OSPMSC MMC...............................................................................12

Technical data................................................................................................................................................................................. 15Common data............................................................................................................................................................................ 15Displacement, flow and pressure OSPM/OSPMS/OSPMC/OSPMSC ON/PB........................................................15Displacement, flow and pressure OSPM/OSPMS/OSPMC/OSPMSC LS.................................................................16Manual steering pressure...................................................................................................................................................... 16Valve function in OSPM steering units..............................................................................................................................17Pressure relief valve................................................................................................................................................................. 17Pilot pressure relief valve.......................................................................................................................................................17Shock valves............................................................................................................................................................................... 18Check valve in P.........................................................................................................................................................................18Check valve in LS.......................................................................................................................................................................18Pressure drop in neutral.........................................................................................................................................................19Weights........................................................................................................................................................................................ 20Port connections.......................................................................................................................................................................22

Rear-ported OSPM port connections...........................................................................................................................22Side-ported OSPM port connections........................................................................................................................... 23

Dimensions.......................................................................................................................................................................................24OSPM dimensions.....................................................................................................................................................................24

OSPM dimension drawing............................................................................................................................................... 24OSPM dimensions details.................................................................................................................................................25

OSPMS dimensions.................................................................................................................................................................. 26OSPMS dimension drawing.............................................................................................................................................26OSPMS dimensions details...............................................................................................................................................27

OSPMC dimensions..................................................................................................................................................................28OSPMC dimension drawing.............................................................................................................................................28OSPMC dimensions details.............................................................................................................................................. 29

OSPMSC dimensions............................................................................................................................................................... 30OSPMSC dimension drawing.......................................................................................................................................... 30OSPMSC dimensions details............................................................................................................................................32

Steering column for OSPMLoad on integrated steering column......................................................................................................................................33Load on the steering unit column........................................................................................................................................... 33Installing the steering column.................................................................................................................................................. 33


Contents

© Danfoss | June 2020 BC152886483654en-000506 | 3

Danfoss is one of the largest producers in the world of steering components for hydrostatic steeringsystems on off-road vehicles. Danfoss offers steering solutions both at component and system levels. Ourproduct range makes it possible to cover applications of all types, ranging from ordinary 2 wheel steering(also known as Ackermann steering) to articulated steering, automatic steering (for example, by sensor)and remote controlled steering via satellite. We can offer more than 1,800 different steering units and 250different priority valves categorized in types, variants and sizes.

Danfoss offers:

For hydrostatic steering systems:

Product type Displacement Rated Flow Steering Pressure

Mini steering units 32 – 100 cm3/rev[1.95 – 6.10 in3/rev]

max. 20 l/min[5.28 US gal/min]

max. 140 bar[2030 psi]

Steering units 40 – 1200 cm3/rev[2.44 to 73.2 in3/rev]

max. 100 l/min[26.4 US gal/min]


Priority valves – 40, 80, 120, 160, 320 l/min[10.6, 21.1, 31.7, 42.3, 84.5US gal/min]


Pilot operated flow-amplifiers (factors: 4, 5, 8,or 10)

– 240 and 400 l/min [63.4 and105.7 US gal/min]


Pilot operated steeringvalves

– max. 100 l/min[26.4 US gal/min]


For electrohydraulic steering systems

Product type Displacement Rated flow Steering pressure

Pilot operated steeringvalves

- 100 l/min [26.4 US gal/min] 250 bar [3625 psi]

Integrated electricaloperated steering valve

100 - 500 cm3/rev[6.10 - 30.51 in3]

50 l/min [13.2 US gal/min] 210 bar [3045 psi]

Electrical operatedsteering valve

- 70 l/min [18.5 US gal/min] 210 bar [3045 psi]


A wide range of steering components


Characteristic features for steering units:

• Low steering torque: from 0.5 to 3 N•m in normal steering situations

• Low noise level

• Low pressure drop

• Many types available: Open center Non-reaction, Open center Reaction, Power Beyond, Closed centerNon-reaction, Load Sensing, Load Sensing Reaction

• One or more built-in valve functions: relief valve, shock valves, suction valves, non-return valve in P-line and LS-line

• Optional port connections according to ISO, SAE or DIN standards

Characteristics for EH steering systems with OSPE, EHPS, and EHi:

• Possibility of GPS, row sensor, variable steering ratio and joystick steering

• Possibility of manual steering even on very heavy vehicles

• EHPS:

‒ High steering pressure requiring smaller cylinders and flow

‒ Low pilot pressure and flow giving extremely low noise in the cabin

‒ Combined with Danfoss PVG 32 proportional valve

Conversion factors

1 N•m = [8.851 lbf•in] 1 l = [0.264 US gal]

1 N = [0.2248 lbf] 1 bar = [14.5 psi]

1 mm = [0.0394 in] °F = [1.8°C + 32]

1 cm3 = [0.061 in3]

Survey of literature on Danfoss steering components

Detailed data on all Danfoss steering components and accessories can be found in our steeringcomponent catalogs, which is divided in to the following individual sub catalogs:

General information Steering components

Technical data on mini steering units OSPM

Technical data on open center, and closed centersteering units

OSPB, OSPC, and OSPD

Technical data on load sensing steering units, priorityvalves and flow amplifiers

OSPB, OSPC, OSPF, OSPD, OSPL, OSPBX, OSPLX, OVPL,OLS and OSQ

Technical data on load sensing steering unit withamplification

OSPU

Technical data on hydraulic and EH pilot operatedsteering valves, electrical actuation modules andappropriate steering units.

EHPS, EHPS w. OLS 320, PVE for EHPS and OSPCX

Technical data on combined steering unit/EH steeringvalves and steering wheel sensors

OSPE

Technical data on electrohydraulic steering valves EHi

Technical data on steering wheel sensors SASA

For technical information on individual variants, please contact the Danfoss Sales Organization.


A wide range of steering components


General Introduction

Danfoss has marketed mini-steering unit OSPM ever since 1995.

OSPM was at that time introduced in versions with rear porting and shafts for direct steering wheelmount, bringing the most cost effective installation.

Positive feedback from the market drives the development and many uprating’s were introduced to theOSPM-program in the years. Among these are:• Introduction of side-ported OSPM versions with 4 and 5 ports in open center non-reaction and power

beyond variants. Side-ported versions are named OSPMS.• Introduction of OSPM in a load sensing version, available in all displacements and valve functions: LS

check valve, pilot relief and shock valves.• NEW VERSIONS: Introducing the 12 tooth male spline and column interface as found on standard

Danfoss steering units: 12 teeth male spline and 4x M10 thread holes for standard column mount.This makes combination of OSPM steering unit and SASA steering angle sensor possible. Theseversions are named OSPMC (rear ported) and OSPMSC (side ported). OSPMC and OSPMSC are alsoavailable with round front flange with 4x M6 thread holes for column mount.

Application

Examples:• Compact-utility tractors• Turfcare machines• Universal tractors• Forklift trucks• Municipal vehicles• ATV’s

Advantages

• Small dimensions and low weight

• End ports with integrated fittings

• Easy installation and accessibility

• Possibility of integrated steering column

• Low pressure drop

• Low input torque

• Low system price

• Low noise

Function

OSPM is a hydrostatic steering unit which can be used with an add-on steering column, or with a steeringcolumn integrated unit. (type A or B).

The steering unit consists of a rotary valve and a rotary meter.

When the steering wheel is turned, oil is directed from the steering system pump via the rotary valve androtary meter to the cylinder ports L or R, depending on the direction of turn. The rotary meter measuresthe oil flow to the steering cylinder in proportion to the angular rotation of the steering wheel.

If the oil supply from the steering system pump fails or is too small, the steering unit is able to work as amanual steering pump.


Steering unit OSPM


Versions

The mini-steering unit is available with displacements of 32, 50, 63, 70, 80 and 100 cm3/rev. [1.95, 3.05,3.84, 4.27, 4.88 and 6.10 in3/rev.] A check valve for emergency steering is standard in all versions, butoptionally, the OSPM can also be fitted with an integrated relief valve and/or shock valves. Check valve inP port is optional in OSPM rear port versions. Check valve in LS port is standard in all LS versions.

The OSPM is also available with an integrated steering column or alternatively in a version prepared for aflange-on steering column.

The connections are integrated endport fittings of the ORFS-type (O-ring face seal). See Port Connections.Standard port size is 9/16”-18 UNF

The mini-steering unit is available in three versions:• Open-Center Non-Reaction (ON)

• Power Beyond (PB) – where surplus oil can be led to the working hydraulics

• Load Sensing (LS) dynamic

The mini-steering unit is available with displacements of: 32, 40, 50, 63, 70, 80 and 100 cm3/rev. [1.95,2.44, 3.05, 3.84, 4.27, 4.88 and 6.10 in3/rev.]

Versions detailed overview

OSPM Feature Standard Optional Note

Check valve for emergency steering – All versions

With integrated relief and/or shockvalves

– –

Check valve in P port – Rear port versions with integratedfittings (ORFS type, O-ring face seal)

Check valve in LS port – All LS versions

For direct steering wheel mount – With male shaft - 2 different types ofhub

For steering column mount – • 9 teeth male shaft and 4x M6thread holes (for OSPM andOSPMS)

• 12 teeth female spline and 4x M10thread holes (for OSPMC andOSPMSC).

For more information about port connections see Rear-ported OSPM port connections on page 22 andthe catalog Technical Information General Steering Components, BC152886484183, section Demandson steering columns for installation dimensions for steering column end towards steering unit.


Steering unit OSPM


OSPM ON

Open center steering units have open connection between pump and tank in the neutral position.


Steering unit OSPM


OSPM PB

While in the neutral position, Power Beyond steering units route oil from the pump through to the E-port.

The steering function always has priority, with any excess oil flow passing through the E port.

If the steering wheel is held at full lock, all flow is led to tank across the pressure relief valve, and flowfrom the E port will stop.

OSPM PB


Steering unit OSPM


OSPM LS

In load sensing steering systems both the steering system and the working hydraulics can be suppliedwith oil from the same pump. The load sensing steering unit works in line with a priority valve and can beconnected in parallel with working hydraulics. The priority valve ensures that the steering unit always haspriority of the oil supply from the pump before any working hydraulics. Steering input is signalled back tothe prioroty valve and/or a load sense pump through an extra port on the steering unit. The load sensesignal controls the oil flow from the priority valve (and/or LS pump). When the steering wheel is in neutralfull flow is available for the working hydraulics connected to the excess flow port of the priority valve. AllOSPM LS steering units are dynamic type.

OSPM LS

P T LS

LSP T

L R

L R


Steering unit OSPM


Code numbers

OSPM Open-center Non-reaction steering units

OSPM Open center Non-reaction (OSPM ON) code numbers

Steering unit Code No.OSPM

Relief valve Shock valves Check valve inP-port

Steering wheel connection

bar [psi] bar [psi]

OSPM 32 ON 150L0101 None None None Flanged-on

OSPM 32 ON 150L2103 75-80 [1087-1160] None None Flanged-on

OSPM 50 ON 150L2114 75-80 [1087-1160] None None Integrated type A

OSPM 50 ON 150L2150 90-95 [1305-1378] 150-170 [2175-2465] Yes Integrated type A

OSPM 50 ON 150L2132 75-80 [1087-1160] None None Integrated type B

OSPM 80 ON 150L0121 None None None Flanged-on

OSPM 80 ON 150L2123 75-80 [1087-1160] None None Flanged-on



OSPM Power Beyond steering units

OSPM Power Beyond (OSPM PB) code numbers

Steering unit Code No.OSPM

Relief valve Shock valves Check valve inP-port


bar [psi] bar [psi]

OSPM 32 PB 150L0107 75-80 [1087-1160] None None Flanged-on

OSPM 50 PB 150L2117 75-80 [1087-1160] None None Flanged-on

OSPM 80 PB 150L0139 None None None Integrated type B

OSPM Load Sensing steering units

OSPM Load Sensing (OSPM LS) code numbers

Steering unit Code No. Relief valve Shock valves Check valvein P-port

Check valvein LS-Port


bar [psi] bar [psi]

OSPM 80 LS 11059680 75-80 [1087-1160] None Yes Yes Flanged-on

OSPMS side-ported steering units

OSPMS side-ported (OSPM S ON) code numbers

Steering unit Code No. Relief valve Shock valves Check valve inP-port


bar [psi] bar [psi]

OSPM S 100 ON 11059689 75-80 [1087-1160] None None Flanged-on

If you wish other versions of OSPM as included in the above codes, please fill in the order in sectionVariants codes for OSPM, OSPMS, OSPMC, and OSPMSC MMC on page 12, and contact the Danfoss salesorganisation.


Steering unit OSPM


Variants and ordering specifications

OSPM, OSPMS, OSPMC and OSPMSC MMC

Determine Master Model Code (MMC). Fill in the codes to specify OSPM steering unit.

MMC-pos. 1 2 3 4 5 6 7

Type Displacement Circuit Type PTL& R Size PTL&R Interface Column Thread LS/E Size

Your OSPM

Example OSPM## 0080 LS## RRRR R A R

MMC-pos. 8 9 10 11 12 13 14

LS/E Interface LS/ELocation

Relief Valve Shock Valves Suction Valves Check Valves Neutral Springs

Your OSPM

Example R A 075 NNN N 4 N10

MMC-pos. 15 16 17 18 19

Spool/Sleeve Set Gear Set Special Label Paint

Your OSPM

Example SN1 G01 NN DNFS PB

OSPM 80 LS example: based on code 11059680

Variants codes for OSPM, OSPMS, OSPMC, and OSPMSC MMC

MMC pos. 1 Main steering product Type

OSPM## OSPM Steering units, rear-ported, male shaft: For column

OSPMA# OSPM Steering units, rear-ported, male shaft: For steering wheel A type

OSPMB# OSPM Steering units, rear-ported, male shaft: For steering wheel B type

OSPMX# OSPM pilot Steering units for EHPS, rear-ported, male shaft: For steering wheel B type

OSPMS# OSPMS Steering units, side-ported, male shaft: For column

OSPMSA OSPMS Steering units, side-ported, male shaft: For steering wheel A type

OSPMSB OSPMS Steering units, side-ported, male shaft: For steering wheel B type

OSPMC# OSPM Steering units, rear-ported, female shaft: 12 teeth for standard column

OSPMSC OSPMS Steering units, side-ported, female shaft: 12 teeth for standard column

OSPMCX OSPMC pilot Steering units for EHPS, rear-ported, female shaft: 12 teeth for standard column

MMC pos. 2 Displacement, cm3/rev

0032 32

0040 40

0050 50

0063 63

0070 70

0080 80

0100 100

MMC pos. 3 Circuit Type

ON## Open center Non-reaction

PB## Power Beyond Non-reaction


Steering unit OSPM


MMC pos. 3 Circuit Type

LS## Load Sensing Non-reaction

CN## Closed Center for X-types

MMC pos. 4 P, T, L & R Port Size

RRRR 9/16"-18 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC)

SSSS 11/16"-16 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC)

SSRR P&T: 11/16"-16 UNF , L&R: 9/16"-18 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC)

EEEE M14x1.5 (ISO 6149-1) (OSPMS/OSPMSC)

TTTT 9/16"-18 UNF (ISO 11926-1) (OSPMS/OSPMSC)

MMC pos. 5 P, T, L & R Port Interface

R ORFS, ISO 8434-3 (OSPM/OSPMC)

F O-ring boss + Spot-face (ISO 6149-1)/ (ISO 11926-1) (OSPMS/OSPMSC)

MMC pos. 6 Column Thread

A M6, M8 ears (ears on end cover) (OSPM)

B M6 (OSPM/OSPMS and OSPMC/OSPMSC w. round flange for column)

M M10x1,5 (OSPMC and OSPMSC w. square flange for column)

MMC pos. 7 LS/E Port Size

N No LS/E Port

R LS/E: 9/16"-18 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC)

S LS/E: 11/16"-16 UNF (ORFS, ISO 8434-3) (OSPM/OSPMC)

D LS: M14x1.5 (ISO 6149-1) (OSPMS/OSPMSC)

T LS/E: 9/16"-18 UNF (ISO 11926-1) (OSPMS/OSPMSC)

MMC pos. 8 LS/E Port Interface

N No LS/E Port

R ORFS, ISO 8434-3 (OSPM/OSPMC)

F O-ring boss + Spot-face (ISO 6149-1)/ (ISO 11926-1) (OSPMS/OSPMSC)

MMC pos. 9 LS/E Port Location

N No LS/E Port

A LS/E: End-ported (OSPM/OSPMC)

B LS/E: Side-ported (OSPMS/OSPMSC)

MMC pos. 10 Relief Valve

NNN No Relief Valve

075 Value for setting (75 bar), P-T. Range OSPM: 40 - 140 bar

MMC pos. 11 Shock Valves

NNN No Shock Valves

125 Value for setting (125 bar), R-T/L-T. Range OSPM: 95 - 200 bar, last digit: 0 or 5

MMC pos. 12 Suction Valves

N No Suction Valves

1 With Suction Valves. Only available for OSPM ON


Steering unit OSPM


MMC pos. 13 Check Valves

N No Check Valves

1 Check Valve in P

4 Check Valve in P and in LS

MMC pos. 14 Neutral Springs

N10 150L4055, torque 0.5-2 Nm in normal steering situations. Soft

N11 150L4058, torque 0.8-2.7 Nm in normal steering situations. Soft - Medium

N12 150L4093, torque 1.1-3.5 Nm in normal steering situations. Medium

N13 150L4094, torque 1.6-4 Nm in normal steering situations. Strong

MMC pos. 15 Spool/Sleeve Set

SM1 OSPM/OSPMS ON. For pump flow range 4-12 l/min. Type Column

SM2 OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type Column

SM3 OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type A

SM4 OSPM/OSPMS ON. For pump flow range 4-12 l/min. Type B

SM5 OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type B

SM6 OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type Column

SM7 OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type A

SM8 OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type B

SN1 OSPM/OSPMS LS. Dynamic flow range 0.6-0.9 l/min. Type Column

SN2 OSPM/OSPMS LS. Dynamic flow range 0.6-0.9 l/min. Type A

SN3 OSPM/OSPMS LS. Dynamic flow range 0.6-0.9 l/min. Type B

SNA OSPM/OSPMS LS. Dynamic flow range 0.6-0.9 l/min. Hissing muted. Type Column

SX7 OSPM/OSPMS CN. For EHPS. Type B

SC1 OSPMC/OSPMSC ON. For pump flow range 5-20 l/min. Type Column, 12 teeth

SC2 OSPMC/OSPMSC PB. For pump flow range 5-20 l/min. Type Column, 12 teeth

SC3 OSPMC/OSPMSC LS. Dynamic flow range 0.6-0.9 l/min. Hissing muted.Type Column, 12 teeth

SX8 OSPMCX CN. For EHPS. Type Column, 12 teeth

MMC pos. 16 Gear Set

G01 Profile grinding

G02 Profile grinding. With Sealed Star

MMC pos. 17 Special

NN Not Applicable

CP Corrosion Protected Shaft. Only available for Spool/Sleeve Sets for• OSPM/OSPMS ON. For pump flow range 5-20 l/min. Type B• OSPM/OSPMS PB. For pump flow range 5-20 l/min. Type B

MMC pos. 18 Label

DNFS Danfoss Standard Label

XXXX Special Label

MMC pos. 19 Paint

PB Black, Powder, RAL 9005 ; Corrosion class C3 ; Standard covering


Steering unit OSPM


Technical data

Common data

Look in sub catalogue: “General Steering Components”

Displacement, flow and pressure OSPM/OSPMS/OSPMC/OSPMSC ON/PB

Steering unit Displacement Recommended* oilflow

Max pressure on connections

Systempressure P-T portpressure

T, absoluteportpressure

L-T/R-T portpressure

SystempressureLS-T portpressure

cm3/rev [in3/rev] l/min [US gal/min] bar [psi] bar [psi] bar [psi] bar [psi]

OSPM 32 ON 32 [1.95] 3-9 [0.8-2.4] 140 [2030] 20 [290] 200 [2900] -

OSPM 40 ON 40 [2.44] 4-12 [1.1-3.2]

OSPM 50 ON 50 [3.05] 5-15 [1.3-4.0]

OSPM 63 ON 63 [3.84] 6-18 [1.6-4.8]

OSPM 70 ON 70 [4.27] 7-20 [1.9-5.3]

OSPM 80 ON 80 [4.88] 7-20 [1.9-5.3]

OSPM 100 ON 100 [6.10] 7-20 [1.9-5.3]

OSPM 32 PB 32 [1.95] 3-20 [0.8-5.3] 140 [2030]

OSPM 40 PB 40 [2.44] 4-20 [1.1-5.3]

OSPM 50 PB 50 [3.05] 5-20 [1.3-5.3]

OSPM 63 PB 63 [3.84] 6-20 [1.6-5.3]

OSPM 70 PB 70 [4.27] 7-20 [1.9-5.3]

OSPM 80 PB 80 [4.88] 7-20 [1.9-5.3]

OSPM 100 PB 100 [6.10] 7-20 [1.9-5.3]* Criteria for determining the recommended oil flow:• The minimum is the oil flow it takes to ensure sufficient steering speed at idle motor speed• Must ensure the least possible pressure loss at full speedThe steering unit can cope with an oil flow that is up to 50% higher than the maximum recommended value.


Steering unit OSPM


Displacement, flow and pressure OSPM/OSPMS/OSPMC/OSPMSC LS

Steering unit Displacement Rated oil flow* Max pressure on connections

cm3/rev [in3/rev] l/min [US gal/min] Systempressure P-T portpressure

T, absoluteportpressure

L-T/R-T portpressure

SystempressureLS-T portpressure

bar [psi] bar [psi] bar [psi] bar [psi]

OSPM 32 LS 32 [1.95] 3 [0.79] 140 [2030] 20 [290] 200 [2900] 140 [2030]

OSPM 40 LS 40 [2.44] 4 [1.06]

OSPM 50 LS 50 [3.05] 5 [1.32]

OSPM 63 LS 63 [3.84] 6 [1.58]

OSPM 70 LS 70 [4.27] 7 [1.85]

OSPM 80 LS 80 [4.88] 8 [2.11]

OSPM 100 LS 100 [6.10] 10 [2.64]* Rated flow at app. 100 rpm steering wheel speed

Manual steering pressure

Under normal operation, where the steering pump supplies an adequade oil flow at the requiredpressure, the maximum torque on the steering wheel will not exceed 2 Nm [17.7 lbf·in]. If the oil flowfrom the steering system pump fails or is too small, the steering unit functions automatically as a manualsteering pump.

Manual steering should only be used for emergency control of the vehicle if a sudden drop of pumppressure occurs.

The table below shows the manual steering pressure (Pm) for all sizes of Danfoss steering units typeOSPM at a steering wheel torque of 80 N•m [708 lbf•in].

The values apply only if the suction conditions on the steering unit T port are adequate.

OSPM 32 40 50 63 80 100

Pm bar 100 90 80 60 50 40

[psi] [1450] [1305] [1160] [870] [725] [580]


Steering unit OSPM


Valve function in OSPM steering units

The data below comes from measurements on a representative sample of steering unit from production.Oil with a viscosity of 21 mm2/s [100 SUS] at 50°C [122°F] was used during measuring.

Pressure relief valve

The pressure relief valve protects the pump and steering unit against excess pressure and limits thesystem pressure while steering.

The pressure relief valve in the steering unit will limit the maximum pressure drop from P to T.

The pressure relief valve is set at 12 l/min [3.17 US gal/min] flow.

Pilot pressure relief valve

P301 161

90

80

70

60

50

40

30

20

10

0

1200

1000

800

600

400

200

0

P-T P-Tpsi bar

0 2 4 6 8 10 12 14 16 18 20

0 1 2 3 4 5Q

Ql/min

US gal/min

The pilot pressure relief valve together with the priority valve limits the maximum steering pressure P-T.The pilot pressure relief valve is set at an oil flow to the priority valve of 12 l/min [3.17 US gal/min]. For theOSPM LS load sensing dynamic steering units, the setting values are valid at a dynamic flow of 0.6 l/min[0.16 US gal/min].


Steering unit OSPM


Shock valves

The shock valves protect the steering unit against shocks from external forces on the steering cylinder.The shock valves in the steering unit limit the max pressure drop from L to T and from R to T. The shockvalves are set at 1 l/min [0.27 US gal/min].

They are of the direct type and therefore have a very quick reaction. The setting tolerance is +20 bar[+290 psi].

Check valve in P

The check valve protects the driver against kickbacks in the steering wheel. It prevents the oil fromflowing back into the pump line during steering under high pressure on the cylinder side. The checkvalve is mounted in the P-connection of the steering unit.

Check valve in LS

The check valve in the LS line of OSPM LS dynamic steering units protects the driver against steeringwheel jerks. The check valve prevents oil from flowing backwards into the LS line to the priority valve,when steering against a high pressure on the cylinder side. This check valve is recommended to have inall OSPM LS dynamic variants.


Steering unit OSPM


Pressure drop in neutral

The pressure drop is measured with the steering unit in neutral position.

On the OSPM ON the pressure drop is measured from P to T.

On the OSPM PB the pressure drop is measured from P to E.

The following values are valid at an oil temperature of 50 °C [122 °F] for rear ported units and at aviscosity of 21 mm2/S [100 SUS]

P301 141

ABC

D

150

125

100

75

50

25

0

10

9

8

7

6

5

4

3

2

1

0

P-T(ON)P-E(PB)

psi barP-T P-T

0 2 4 6 8 10 12 14 16 18 20 l/min

0 1 2 3 4 5 US gal/min

Q

Q

A: OSPM 32 ON + all PB

B: OSPM 50-100 ON

C: OSPMS PB

D: OSPMS ON


Steering unit OSPM


Weights

Type Weight

kg [lb]

OSPM 32 ON 2.3 [5.1]

OSPM 40 ON 2.4 [5.3]

OSPM 50 ON 2.5 [5.5]

OSPM 63 ON 2.6 [5.7]

OSPM 80 ON 2.7 [5.9]

OSPM 100 ON 2.9 [6.4]

OSPM 32 PB/LS 2.6 [5.7]

OSPM 40 PB/LS 2.7 [5.9]

OSPM 50 PB/LS 2.8 [6.2]

OSPM 63 PB/LS 2.9 [6.4]

OSPM 80 PB/LS 3.0 [6.6]

OSPM 100 PB/LS 3.2 [7.1]

OSPMS 32 ON 2.5 [5.5]

OSPMS 40 ON 2.6 [5.7]

OSPMS 50 ON 2.7 [5.9]

OSPMS 63 ON 2.8 [6.2]

OSPMS 80 ON 2.9 [6.4]

OSPMS 100 ON 3.1 [6.8]

Type Weight

kg [lb]

OSPMS 32 PB/LS 2.9 [6.4]

OSPMS 40 PB/LS 3.0 [6.6]

OSPMS 50 PB/LS 3.1 [6.8]

OSPMS 63 PB/LS 3.2 [7.1]

OSPMS 80 PB/LS 3.3 [7.3]

OSPMS 100 PB/LS 3.5 [7.7]

OSPMC 32 ON, square flange for column 3.1 [6.8]






OSPMC 32 PB/LS, square flange for column 3.3 [7.3]






OSPMC 32 ON, round flange for column 2.8 [6.2]





Steering unit OSPM


Type Weight

kg [lb]



OSPMC 32 PB/LS, round flange for column 3.1 [6.8]






OSPMSC 32 ON, square flange for column 3.4 [7.5]






OSPMSC 32 PB/LS, square flange for column 3.7 [8.1]






OSPMSC 32 ON, round flange for column 3.1 [6.8]






OSPMSC 32 PB/LS, round flange for column 3.5 [7.7]







Steering unit OSPM


Port connections

Rear-ported OSPM port connections

The connections of all rear-ported OSPM steering unit codes in this Technical Information are 9/16-18UNF of the O-ring face seal type (ORFS). O-rings are assembled into the O-ring groove (dovetail) of thefitting bolt from factory.

The integrated end-port fittings makes hose installation easy.

R: 9/16-18 UNF ORFS, ISO 8434-4

R

min

11.

8 [0

.46

in]

5.75

[0.2

2 in

]

Dimensions of O-rings for 9/16-18 UNF ORFS ports: 7.65 × 1.78 mm [3.02 × 0.702 in] (SAE J515 seal sizeno. 011).

Rear-ported OSPM steering units are also available with 11/16-16UNF ORFS type.

S: 11/16-16 UNF ORFS, ISO 8434-3

S

min

11.

8 [0

.46i

n]5.

95 [0

.23i

n]

Dimensions of O-rings for 11/16-16 UN ORFS ports: 9.25 × 1.78 mm [0.334 × 0.0701 in]


Steering unit OSPM


Side-ported OSPM port connections

The standard port size for all side ported OSPMS versions in this Technical Information is 9/16-18 UNF

T: 9/16-18 UNF, ISO 11926-1

min

12.

7 [0

.49

in]

min ø24.9[ø0.98in]

max

0.6

[0.0

2in]

OSPMS is also available with M 14 × 1.5:

E: M14 x 1.5, ISO 6149-1

min

11.

5 [0

.45i

n]

E

min ø24.9

max

0.6

[0.0

2in]

[ø0.98in]


Steering unit OSPM


Dimensions

OSPM dimensions

OSPM dimension drawing

All dimensions in mm[in]

E: 4 × M6, 11 mm [0.432 in] deep

A: 5 × 6.5 DIN 6888(Not included)

K: Taper 1:20

With 1 1⁄16 in - 40 serrations

dmin = 17.92 mm [0.72 in]

K: Taper 1:12


Steering unit OSPM


OSPM dimensions details

Mini steering unit L1 L2

mm [in] mm [in]

OSPM 32 ON 90 [3.54] 11.0 [0.43]

OSPM 40 ON 93 [3.66] 13.7 [0.54]

OSPM 50 ON 96 [3.78] 17.1 [0.67]

OSPM 63 ON 100 [3.94] 21.6 [0.85]

OSPM 70 ON 103 [4.05] 24.0 [0.94]

OSPM 80 ON 106 [4.17] 27.4 [1.08]

OPSM 100 ON 113 [4.45] 34.2 [1.35]

OSPM 32 PB/LS 103 [4.06] 11.0 [0.43]

OSPM 50 PB/LS 109 [4.29] 17.1 [0.67]

OSPM 63 PB/LS 113 [4.45] 21.6 [0.85]

OSPM 70 PB/LS 116 [4.57] 24.0 [0.94]

OSPM 80 PB/LS 119 [4.69] 27.4 [1.08]

OSPM 100 PB/LS 126 [4.96] 34.2 [1.35]


Steering unit OSPM


OSPMS dimensions

OSPMS dimension drawing


∅ 58

[∅2.28]

54˚

4x90˚

36˚

∅58

[∅2.28]

54˚

4x90˚

36˚

Type A

Type B

6 [0.24]

K

5/8-

18 U

NF

∅34

[1.3

4]

60 [2.36]

14 [0.55]

30 [1.18]

4 [0.16]

13[0

.51]

26 [1

.02]

16[0.63]

43 [1.69]71 [2.80]

33.5 [1.32]

60.5 [2.38]

6 [0.24]

20 [0.79]

L

L2

1∅

34 [1

.34]

∅16

.52

±0.0

5[∅

0.65

±0.

001]

K

min. 28

M8

x1.2

5 20 [0.79]34 [1.34] 6 [0.24]

∅34

[1.3

4]

A

A: 5x6.5 DIN 6888K: Taper 1:20

∅58

[∅2.28]

54˚

4x90˚

36˚

E

E: 4xM6.11mm [0.432 in] deep

P301 150

∅ 1.321 [0.0520]

∅ 1.319 [0.0519]

∅ 19.49 [0.767]

∅ 19.56 [0.770] ∅ 17.52 [0.690]

∅ 17.44 [0.687]

∅ 16.51[0.650]∅ 16.37[0.644]

With 1 1⁄16 in-40 serrations

dmin = 17.92 mm [0.72 in]

K: Taper 1:12


Steering unit OSPM


OSPMS dimensions details

OSPMS dimensions

Mini steering unitOSPMS

L1 L2

Mm [in] mm [in]

OSPMS 32 ON 107 [4.21] 11.0 [0.43]

OSPMS 40 ON 110 [4.33] 13.7 [0.54]

OSPMS 50 ON 114 [4.49] 17.1 [0.67]

OSPMS 63 ON 118 [4.65] 21.6 [0.85]

OSPMS 70 ON 120 [4.73] 24.0 [0.94]

OSPMS 80 ON 124 [4.89] 27.4 [1.08]

OSPMS 100 ON 131 [5.16] 34.2 [1.35]

OSPMS 32 PB/LS 120 [4.73] 11.0 [0.43]

OSPMS 40 PB/LS 122 [4.81] 13.7 [0.54]

OSPMS 50 PB/LS 126 [4.96] 17.1 [0.67]

OSPMS 63 PB/LS 130 [5.12] 21.6 [0.85]

OSPMS 70 PB/LS 133 [5.24] 24.0 [0.94]

OSPMS 80 PB/LS 136 [5.36] 27.4 [1.08]

OSPMS 100 PB/LS 143 [5.63] 34.2 [1.35]


Steering unit OSPM


OSPMC dimensions

OSPMC dimension drawing


OSPMC w/ 12 teeth female splines and 4 x M10 thread for standard steering column.

R23.5

(5x)72°

min 7.1 [0.28]

ø44.

4±0.

05

ø25.

4

2.8 [0.11]

7 [0.28]

12 [0.47]L1

L2

ø66

83

83

ø82±0.3

45°

B

[0.93]

[1.7

4±0.

002]

[1.0

]

[2.5

9]

[3.2

6]

[3.26]

[3.23±0.01]

P, T, L, R, and PB/LS 9/16"-18 UNF, ORFS, ISO 8434-3

OR: 11/16"-16 UNF, ORFS, ISO 8434-3

B M10 x 1.5, 12mm [0.47 in] deep

OSPMC w/ 12 teeth femal splines and 4 x M6 thread for steering column

R23.5

(5x)72°

ø69.

85±0

.05

ø25.

4

6.5 [0.25]

12.5 [0.49]

L1

L2

min 7.6 [0.29]

ø66

(4x)90°

ø59

C

[0.92]

[2.7

5±.0

02]

[0.9

9]

[2.5

9]

[2.32]

P, T, L, R, and PB/LS 9/16"-18 UNF, ORFS, ISO 8434-3

OR: 11/16"-16 UNF, ORFS, ISO 8434-3

C M6 x 1, 12.5 mm [0.49 in] deep


Steering unit OSPM


OSPMC dimensions details

Mini steering unitOSPMC w.square or round flange

L1 L2

mm [in] mm [in]

OSPMC 32 ON 130 [5.12] 11.0 [0.43]

OSPMC 40 ON 133 [5.24] 13.7 [0.54]

OSPMC 50 ON 136 [5.36] 17.1 [0.67]

OSPMC 63 ON 141 [5.56] 21.6 [0.85]

OSPMC 70 ON 143 [5.63] 24.0 [0.94]

OSPMC 80 ON 147 [5.79] 27.4 [1.08]

OSPMC 100 ON 153 [6,03] 34.2 [1.35]

OSPMC 32 PB/LS 143 [5.63] 11.0 [0.43]

OSPMC 40 PB/LS 146 [5.75] 13.7 [0.54]

OSPMC 50 PB/LS 149 [5.87] 17.1 [0.67]

OSPMC 63 PB/LS 154 [6.07] 21.6 [0.85]

OSPMC 70 PB/LS 156 [6.15] 24.0 [0.94]

OSPMC 80 PB/LS 160 [6.30] 27.4 [1.08]

OSPMC 100 PB/LS 166 [6.54] 34.2 [1.35]


Steering unit OSPM


OSPMSC dimensions

OSPMSC dimension drawing


OSPMSC w/ 12 teeth female splines and 4 x M10 thread for standard steering column

min 7.1 [0.28]

ø44.

4±0.

05

ø25.

4

2.8 [0.11]7 [0.27]

12 [0.47]L1

L2

83 [3.26]

55 [2.16]28

A

26 [1

.02]

13 [0

.51]

45.5 [1.79]72.5 [2.85]

42 [1

.65]

83

83

B

ø82±0.3

45°

[1.7

4±0.

001]

[0.9

9]

[3.26]

[3.2

6]

[1.10]

A (P, T, L, R, andPB/LS)

9/16"-18 UNF w/ O-ring boss and spot-face, ISO 11926-1, 12.7 mm [0.40 in] deep

OR: M14 x 1.5 w/ O-ring boss and spot-face, ISO 6149-1, 11.5mm [0.45 in] deep

B M10 x 1.5, 12 mm [0.47 in] deep


Steering unit OSPM


OSPMSC w/ 12 teeth female splines and 4 x M6 thread for steering column

min 7.6 [0.29]

ø69.

85±0

.05

h25.

4

6.5 [0.25]12.5 [0.49]

L1

L2

(4x)90° C

ø59

83.5 [3.28]55.5 [2.18]

28.5 [1.12]

26 [1

.02]

13

46 [1.81]

73 [2.87]

A

42 [1

.65]

[2.7

4±0.

001]

[0.9

9]

[2.32]

[0.5

1]

A (P, T, L, R, andPB/LS)

9/16"-18 UNF w/ O-ring boss and spot-face, ISO 11926-1, 12.7 mm [0.40 in] deep

OR: M14 x 1.5 w/ O-ring boss and spot-face, ISO 6149-1, 11.5mm [0.45 in] deep

C M6 x 1, 12.5 mm [0.49 in] deep


Steering unit OSPM


OSPMSC dimensions details

Mini steering unitOSPMSC w.square or round flange

L1 L2

Mm [in] mm [in]

OSPMSC 32 ON 120 [4.73] 11.0 [0.43]

OSPMSC 40 ON 123 [4.85] 13.7 [0.54]

OSPMSC 50 ON 126 [4.96] 17.1 [0.67]

OSPMSC 63 ON 131 [5.16] 21.6 [0.85]

OSPMSC 70 ON 133 [5.24] 24.0 [0.94]

OSPMSC 80 ON 137 [5.40] 27.4 [1.08]

OSPMSC 100 ON 143 [5.63] 34.2 [1.35]

OSPMSC 32 PB/LS 133 [5.24] 11.0 [0.43]

OSPMSC 40 PB/LS 135 [5.32] 13.7 [0.54]

OSPMSC 50 PB/LS 139 [5.48] 17.1 [0.67]

OSPMSC 63 PB/LS 143 [5.63] 21.6 [0.85]

OSPMSC 70 PB/LS 146 [5.75] 24.0 [0.94]

OSPMSC 80 PB/LS 149 [5.87] 27.4 [1.08]

OSPMSC 100 PB/LS 156 [6.15] 34.2 [1.35]


Steering unit OSPM


Load on integrated steering column

Symbols:

L (m/in): Axial length between OSPM housing and steering wheel

Fr (N/lb): Radial force on steering wheel

Fa (N/lb): Axial force on steering wheel

MB (Nm/lbf·in): Bending moment on steering column MB = Fr . L

The following max. permissible values must not be exceeded:

MB max.: 50 Nm [438 lbf·in]

Fr max: 500 N [112 lb]

Fa max: 600 N [135 lb]

With a given length L the max. force Fr on the steering wheel can be calculated:

Fr = MB max N; L in m

L + 0.015

Fr = MB max lb; L in inch

L + 0.590

Load on the steering unit column

The construction of the steering column must ensure that no axial or radial forces are transferred to thesteering unit.

Such forces may prevent the steering unit from returning to neutral position automatically after asteering action has been completed.

Installing the steering column

Maximum tightening torque for fixing screws M6: 10 +3-0 N•m [88 +27

-0 lbf•in]

M10: 30 +5/-0 N•m [265 -0+44 lbf•in]


Steering column for OSPM


Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic andelectric components. We specialize in providing state-of-the-art technology and solutionsthat excel in the harsh operating conditions of the mobile off-highway market as well as themarine sector. Building on our extensive applications expertise, we work closely with you toensure exceptional performance for a broad range of applications. We help you and othercustomers around the world speed up system development, reduce costs and bring vehiclesand vessels to market faster.

Danfoss Power Solutions – your strongest partner in mobile hydraulics and mobileelectrification.

Go to www.danfoss.com for further product information.

We offer you expert worldwide support for ensuring the best possible solutions foroutstanding performance. And with an extensive network of Global Service Partners, we alsoprovide you with comprehensive global service for all of our components.

Local address:

Danfoss Power Solutions GmbH & Co. OHGKrokamp 35D-24539 Neumünster, GermanyPhone: +49 4321 871 0

Danfoss Power Solutions ApSNordborgvej 81DK-6430 Nordborg, DenmarkPhone: +45 7488 2222

Danfoss Power Solutions (US) Company2800 East 13th StreetAmes, IA 50010, USAPhone: +1 515 239 6000

Danfoss Power Solutions Trading(Shanghai) Co., Ltd.Building #22, No. 1000 Jin Hai RdJin Qiao, Pudong New DistrictShanghai, China 201206Phone: +86 21 2080 6201

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to productsalready on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

© Danfoss | June 2020 BC152886483654en-000506

Products we offer:

• DCV directional controlvalves

• Electric converters

• Electric machines

• Electric motors

• Gear motors

• Gear pumps

• Hydrostatic motors

• Hydrostatic pumps

• Orbital motors

• PLUS+1® controllers

• PLUS+1® displays

• PLUS+1® joysticks andpedals

• PLUS+1® operatorinterfaces

• PLUS+1® sensors

• PLUS+1® software

• PLUS+1® software services,support and training

• Position controls andsensors

• PVG proportional valves

• Steering components andsystems

• Telematics

Hydro-Gearwww.hydro-gear.com

Daikin-Sauer-Danfosswww.daikin-sauer-danfoss.com

OSPM Mini-Steering Unit · 2020. 9. 6. · The mini-steering unit is available with displacements...

Documents

Transcript of OSPM Mini-Steering Unit · 2020. 9. 6. · The mini-steering unit is available with displacements...