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General, Orbital Motors Technical Information
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General, Orbital Motors Technical Information - 2

General, Orbital Motors Technical Information A Wide Range of Orbital Motors A Wide Range of Hydraulic Motors Sauer-Danfoss is Europe’s largest producer of high torque low speed hydraulic motors. We can offer more than1600 different hydraulic motor versions categorised in types, variants and sizes. The motors vary in size [rated displacement] from 8 cm3 [0,49 in3] to 800 cm3 [48,91 in3] per revolution. Speeds range up to approx. 2500 min -1 for the smallest type and up to approx 600 min -1 for the largest type. Maximum operating torques vary from 13 Nm [115 lbf•in] to 2700 Nm [24.000...

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General, Orbital Motors Technical Information - 3

General, Orbital Motors Technical Information A Wide Range of Orbital Motors A Wide Range of Hydraulic Motors (continue) The programme is characterised by technical features appealing to a large number of applications and a part of the programme is characterised by motors that can be adapted to a given application. Adaptions comprise the following variants among others: • • • • • • • • • • • • • • Motors with corrosion resistant parts Wheel motors with a recessed mounting flange OMP, OMR motors with needle bearings OMR motors in low leakage version OMR motors in a super low leakage version...

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General, Orbital Motors Technical Information - 4

General, Orbital Motors Technical Information Contents and Technical Literature Survey Contents and Technical Literature Survey Survey of Literature with Technical Data on Sauer-Danfoss Orbital Motors Detailed data on all Sauer-Danfoss motors can be found in our motor catalogue, which is divided into 4 individual subcatalogues: • Technical data on small motors: • Technical data on medium sized motors: • Technical data for medium-sized motors: • Technical data on large motors: The most important data on all Sauer-Danfoss orbital motors is highlighted in a general survey brochure. For...

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General, Orbital Motors Technical Information - 5

General, Orbital Motors Technical Information Orbital Motors, General Operating Principle Orbital motors convert hydraulic energy (pressure, oil flow) into mechanical energy (torque and speed). Sauer-Danfoss orbital motors are of fixed displacement high-torque design. For a given oil flow and given pressure the displacement (size of motor) determines the speed and torque. For a given displacement (size of motor) the speed is determined by the oil flow rate and the torque is determined by the pressure differential. Gearwheel set The operating principle of the motors is based on an internal...

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General, Orbital Motors Technical Information - 6

General, Orbital Motors Technical Information Orbital Motors, General Operating Principle (continue) Disc valve on the output shaft • OMEW motors have a disc valvemounted on the output shaft. The cardan shaft rotates the disc valve and transfers mechanical energy from the gearwheel to the output shaft. The hydraulic forces are equalised by the balance plate. A: Output shaft B: Disc valve C: Cardan shaft D: Gearwheel set

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General, Orbital Motors Technical Information - 7

General, Orbital Motors Technical Information Selection of Motor Selection of Motor Type OML, OMM, OMP, OMPW, DH - Rollerless gear rim - Spool valve integrated with output shaft - Output shaft supported in slide bearings OMPW N - Rollerless gear rim - Spool valve integrated with output shaft - Output shaft supported in needle bearings OMR, OMH, DS - Gear rim with rollers - Spool valve integrated with output shaft - Output shaft supported in slide bearings OMRW N - Gear rim with rollers - Spool valve integrated with output shaft - Output shaft supported in needle bearings OMEW - Gear rim...

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General, Orbital Motors Technical Information - 8

General, Orbital Motors Technical Information Selection of Motor Type Features of Main Types (continue) OMRW N Because of the rollers in the gear rim OMRW N is suitable for continuous operation under demanding operating conditions: e.g. high pressures, thin oil, or frequent reversals. The needle bearings of the output shaft make OMRW N suitable for absorbing static and dynamic radial loads. OMEW OMEW motors have a disc valve mounted on the output shaft, i.e. hydraulic and mechanical losses are reduced to a minimum and the gearwheel set is fitted with rollers. OMEW is therefore ideal for...

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General, Orbital Motors Technical Information - 9

General, Orbital Motors Technical Information Motor Variants Motor Variants Motors with corrosion resistant parts OMP and OMR motors are available in a version with corrosion resistant parts: OMP C and OMR C. The corrosion resistant parts are: output shaft (1), key (2), front cover (3), and front cover screws (4). The dust seal (5) is of nitrile rubber with stainless steel cap. OMP/OMR with dust seal cap OMP and OMR motors are also available with a dust seal cap. These motors are particularly suitable for sweepers, etc. where resistance to high dust concentrations is a requirement....

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General, Orbital Motors Technical Information - 10

General, Orbital Motors Technical Information Motor Variants Motor Variants (continue) Super low leakage motor The OMR motor is available in a special version that keeps spool valve and output shaft apart and supports the output shaft in needle bearings. This motor is particularly suitable for applications with demands for exceptionally low leakage. Type designation: OMR NA. Short motors OMS, OMT and OMV motors are available in short versions. It can be an advantage to use a short motor for gears that already have the capacity to absorb radial and axial forces. Type designations are OMSS,...

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General, Orbital Motors Technical Information - 11

General, Orbital Motors Technical Information Motor Variants Motor Variants (continue) Motors with integrated negative holding brake OMT and TMT with integrated multi-disc brake is available in four versions: OMT FH, OMT FL, OMT FX and TMT FL. The brake is a spring activated multi-disc type that is released by a hydraulic pressure. OMT FH can work with high drop pressure [e.g. piloted from a shuttle valve in open loop systems], whereas OMT FL, OMT FX and TMT FL release the brake at low pressure [e.g. piloted from the charge pump in closed loop systems]. OMT FX are particularly well-suited...

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General, Orbital Motors Technical Information - 12

General, Orbital Motors Technical Information Motor Variants Motor Variants (continue) Motors with speed sensor OMM, OMP, OMR, OMS, OMSW, OMT and OMV are available with integrated speed sensor. The electric output signal is a standardized voltage signal that may for example be used with Sauer-Danfoss' electronic module type EHSC to control the speed of the motor. The speed is registered by an inductive sensor. Signal processing and amplification are integrated in the housing of the sensor. Type designation: OM - EM. OMT N motor OMT is available in a short version with high bearing capacity....

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