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Orbital Motors General
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Orbital Motors General - 1

MAKING MODERN LIVING POSSIBLE Technical Information Orbital Motors General

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Orbital Motors General - 2

Technical Information General, Orbital Motors Revision history Table of revisions Date Converted to Danfoss layout - DITA CMS

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Orbital Motors General - 3

Technical Information General, Orbital Motors Selection of Motor Type Selection of Motor Size Bearing Dimensioning

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Orbital Motors General - 4

Technical Information General, Orbital Motors

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Orbital Motors General - 5

Technical Information General, Orbital Motors A wide range of Orbital Motors Characteristic, features and application areas of Orbital Motors Danfoss is a world leader within production of low speed orbital motors with high torque. We can offer more than 3,000 different orbital motors, categorised in types, variants and sizes (including different shaft versions). The motors vary in size (rated displacement) from 8 cm³ [0.50 in³] to 800 cm³ [48.9 in³] per revolution. Speeds range up to approximate 2,500 min-1 (rpm) for the smallest type and up to approximate 600 min-1 (rpm) for the largest...

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Orbital Motors General - 6

Technical Information General, Orbital Motors A wide range of Orbital Motors Motors with corrosion resistant parts Wheel motors with recessed mounting flange OMP, OMR- motors with needle bearing OMR motor in low leakage version OMR motors in a super low leakage version Short motors without bearings Ultra short motors Motors with integrated positive holding brake Motors with integrated negative holding brake Motors with integrated flushing valve Motors with speed sensor Motors with tacho connection All motors are available with black finish paint The Danfoss Orbital Motors are used in the...

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Technical Information General, Orbital Motors Conversion Factors 1 Nm = [8.851 lbf.in] 1 cm3 = [0.061 in3] 1 N = [0.2248 lbf ] 1 l = [0.22 UK gal] 1 bar = [14.50 psi] 1 l = [0.264 US gal] 1 mm = [0.0394 in] °F = [1.8 °C + 32]

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Technical Information General, Orbital Motors Orbital Motors, General Operating Principle Orbital motors convert hydraulic energy (pressure, oil flow) into mechanical energy (torque and speed). 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 gear...

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Orbital Motors General - 9

Technical Information General, Orbital Motors Orbital Motors, General Disc valve with valve drive OMS, OMT, OMV and TMT motors have a disc valve: The distributor valve has been separated from the output shaft and it is driven by a short cardan shaft [valve drive]. A balance plate counterbal-ances the hydraulic forces around the distributor valve. A: Output shaft D: Valve drive B: Cardan shaft E: Check valve C: Gearwheel set F: Disc valve 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...

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Orbital Motors General - 10

Technical Information General, Orbital Motors Selection of Motor Type Rollerless gear rim Spool valve integrated with output shaft Output shaft supported in slide bearings Rollerless gear rim Spool valve integrated with output shaft Output shaft supported in needle bearings

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Orbital Motors General - 11

Technical Information General, Orbital Motors Selection of Motor Type OMR, OMH, DS Gear rim with rollers Spool valve integrated with output shaft Output shaft supported in slide bearings Gear rim with rollers Spool valve integrated with output shaft Output shaft supported in needle bearings Gear rim with rollers Disc valve on output shaft Output shaft supported in needle bearings Gear rim with rollers Disc valve with separate valve drive Output shaft supported in tapered roller bearings Gear rim with rollers Disc valve with separate valve drive Output shaft supported in tapered roller...

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Technical Information General, Orbital Motors Selection of Motor Type 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 continuous operation in demanding...

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Orbital Motors General - 13

Technical Information General, Orbital Motors Selection of Motor Type Wheel motor OMP, OMR, OMS, OMT and OMV motors are available in wheel motor versions. The recessed mounting flange makes it possible to fit a wheel hub or a winch drum so that the radial load acts midway between the two motor bearings. This gives the best utilisation of the bearing capacity and is a very compact solution. Type designations of wheel motors are OMPW, OMPW N, OMRW N, OMEW, OMSW, OMTW, and OMVW. OMP/OMR with needle bearing For applications that want to use the OMP/OMR but must also consider other operating...

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Orbital Motors General - 14

Technical Information General, Orbital Motors Selection of Motor Type 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, OMTS and OMVS. Ultrashort motor OMS, OMT, OMV and TMT are available with ultrashort installation dimensions, i.e. without bearings and output shaft. The ultrashort design allows an opti-mised integration of the motor in the counterpart. Special installation conditions please contact the Danfoss Sales...

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Technical Information General, Orbital Motors Selection of Motor Type 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 for applications that require very short installation...

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