Product Overview
This product group encompasses three core models from the Danfoss orbital motor platforms: the OMSS200 (part number 151F0539), the OMVW630 (part number 151B3123), and the OMRX100 (part number 11185588, superseding 151-0722 and 151-0422). Each model is engineered as a direct drop-in interchange for its corresponding Danfoss original, matching mounting flange, shaft specification, port position, and performance envelope. Every unit undergoes 100% simulated load testing before shipment, with archived data covering torque output at rated pressure, volumetric efficiency across multiple speed points, and internal leakage verification.
Technical Specifications
OMSS200 (151F0539) — Short Type Orbital Motor
Motor Type: OMS Short Version, bearingless, direct gearbox mounting
Geometric Displacement: 200.0 cm³/rev
Max. Speed (Continuous): 375 rpm
Max. Speed (Intermittent): 450 rpm
Max. Pressure Drop (Continuous): 210 bar
Max. Pressure Drop (Intermittent): 250 bar
Max. Pressure Drop (Peak): 270 bar
Max. Torque (Continuous): 610 N·m
Max. Torque (Intermittent): 720 N·m
Max. Output (Continuous): 16.5 kW
Max. Flow (Continuous): 75 L/min
Rotor Length: 34.8 mm
Housing Length: 145 mm
Weight: Approx. 9.1 kg
Seal Kit No.: 151F0103
OMVW630 (151B3123) — Wheel Drive Orbital Motor
Motor Type: OMVW Wheel Motor, integrated mounting flange with reinforced bearing support
Geometric Displacement: 629.1 cm³/rev
Max. Speed (Continuous): 320 rpm
Max. Speed (Intermittent): 380 rpm
Max. Pressure Drop (Continuous): 18 MPa (180 bar)
Max. Pressure Drop (Intermittent): 21 MPa (210 bar)
Max. Torque (Continuous): 1660 N·m
Max. Torque (Intermittent): 1940 N·m
Max. Flow (Continuous): 200 L/min
Output Shaft: Ø60 mm tapered shaft with key
Flange: Square flange, Ø200 mm
Port Size: G1
Weight: Approx. 28 kg
OMRX100 (11185588) — Medium Speed Orbital Motor
Motor Type: OMR-X Series, latest generation OMP/OMR upgrade platform
Geometric Displacement: 99.8 cm³/rev
Max. Speed (Continuous): 600 rpm
Max. Speed (Intermittent): 750 rpm
Max. Torque (Continuous): 240 N·m
Max. Torque (Intermittent): 280 N·m
Max. Output (Continuous): 13 kW
Max. Output (Intermittent): 15 kW
Max. Working Pressure: 200 bar
Mounting Flange: A2 (2-bolt, 106.1 mm PCD)
Output Shaft: 1″ splined (6-tooth), or 25 mm cylindrical
Port Size: G1/2
Case Drain: Standard
Weight: Approx. 7.5 kg
Interchange Reference
OMSS200 151F0539 — Direct interchange with Danfoss OMSS200 short series
OMVW630 151B3123 — Direct interchange with Danfoss OMVW630 wheel motor series
OMRX100 11185588 — Interchange and supersedes Danfoss 151-0722 / 151-0422 (OMR100) and White Drive OMR-X 100 series
Key Technical Advantages
1. Precision Geroler Gear Set with High Volumetric Efficiency
The OMSS200 and OMRX100 utilize a Geroler (gerotor with rollers) gear set manufactured to micron-level tolerances. The engagement between roller pins and the cycloidal gear profile is hydrodynamically optimized to minimize internal leakage, achieving volumetric efficiency above 95%. Stable torque output is maintained at speeds as low as 5-10 rpm without stick-slip, making these motors ideal for drilling rig rotation drives and harvester reel applications requiring smooth low-speed operation.
2. Heavy-Duty Bearing System for Wheel Drive Applications
The OMVW630 features an output shaft supported by reinforced tapered roller bearings designed to withstand the complex radial and axial loads encountered in vehicle wheel drive systems. The Ø60 mm tapered shaft with square flange enables direct mounting inside the wheel hub, eliminating intermediate transmission components. Bearing dynamic load ratings are rigorously verified, with calculated L10 life exceeding 10,000 hours under continuous operating conditions.
3. Disc Valve Design for Low-Noise Operation
All three models employ a disc valve plate fabricated from powder metallurgy bimetal composite, combining wear resistance with self-lubricating properties. Progressive throttling in the valve transition zone reduces pressure shock and flow pulsation during commutation, lowering operating noise by 3-5 dB(A) compared to conventional designs. The OMSS200 short configuration further reduces mechanical transmission paths, minimizing vibration transfer at the gearbox coupling interface.
4. 100% Simulated Load Testing & Batch Consistency
Every OMSS200, OMVW630, and OMRX100 undergoes simulated load testing on a dedicated test bench before shipment. Test protocols cover output torque verification at rated pressure, volumetric efficiency measurement at multiple speed points, internal leakage testing, overspeed validation, and noise assessment. All test data is archived and traceable, ensuring each motor’s performance matches its published specifications—a critical requirement for continuous-duty equipment in drilling and harvesting operations.
Application Areas
OMSS200 151F0539
Oil & Gas Drilling Rigs: Rotary table drive, auxiliary winch drive
Construction Machinery: Rotary drilling rig swing drive
Industrial Equipment: Direct gearbox coupling drive scenarios
OMVW630 151B3123
Grape Harvesters: Wheel drive motor (OEM fitment)
Heavy Construction Vehicles: Wheeled drive systems
Mining Equipment: Heavy-duty travel drive
OMRX100 11185588
Agricultural Machinery: Combine harvester reel drive, conveyor drive
Industrial Machinery: Automatic rotary indexing tables, conveyor drives
Material Handling: Small winches, street sweeper brush drives
Expert Maintenance Tips
1. Mounting Fit and Bolt Torque
Verify that the flange spigot and machine mounting bore conform to H8/f7 tolerance fit before installation. For the OMVW630 square flange, tighten mounting bolts in diagonal sequence in 2-3 stages to the specified torque. When installing the OMSS200 as a bearingless short motor, ensure the spline engagement length between the gearbox input shaft and motor rotor is no less than 80% of total spline length to avoid localized stress concentration.
2. Case Drain Piping
The OMRX100 and OMVW630 are equipped with case drain ports that must be piped separately to the reservoir—never connected in parallel with the main return line. Case drain back pressure should be maintained below 0.5 bar. The OMSS200 has no independent case drain port; ensure gearbox internal pressure does not exceed the motor shaft seal’s allowable back pressure rating during installation.
3. System Flushing and Oil Cleanliness
After initial installation or motor replacement, operate at 500-800 rpm under no load for 10-15 minutes to purge air. System oil cleanliness should meet NAS 9 or ISO 18/15 or better. A 10 μm return-line filter is recommended. For the OMVW630, flushing flow should be increased to at least 1.5 times the motor’s rated flow due to its larger displacement.
4. Storage and Extended Shutdown
For long-term storage, install port plugs and fill the motor with clean hydraulic oil. Store at temperatures between -20°C and +50°C. The OMSS200, lacking an independent shaft seal, requires particular attention to spline corrosion prevention during storage. Motors stored for more than 6 months should undergo an internal leakage check before installation.
