Danfoss OMS OMT OMP Series Orbital Hydraulic Motor | 151F0501 151B3000 151B0313

The OMS, OMT, and OMP series orbital hydraulic motors by Chengyuan Hydraulic are premium actuation components engineered to the exact technical standards of Danfoss. This series covers a wide range of applications, including specific high-demand part numbers such as 151F0501 (OMS 100), 151B3000 (OMT 160), and 151B3106 (OMT 500).

Designed as high-torque, low-speed (HTLS) motors, the Chengyuan range utilizes advanced Geroler and Gerotor gear sets combined with sophisticated valve technologies (Disc and Spool valves). Our core value proposition is 100% Original-Place Interchangeability: every motor matches Danfoss’s mounting flanges, shaft dimensions, and port layouts. To ensure industrial-grade reliability, every unit undergoes 100% simulated load testing, guaranteeing consistent performance in the toughest agricultural, construction, and maritime environments.

Technical Specifications :

• Compatible Brand Series: Danfoss OMP, OMS, OMT Series Replacement

• OMS 100 (151F0501):

  • Displacement: 100 $cm^3/rev$

  • Pressure: 210 bar (Cont.) / 250 bar (Peak)

  • Max Speed: 750 rpm

  • Max Torque: 305 Nm

• OMT 160 (151B-3000 / 151B-3205):

  • Displacement: 160 $cm^3/rev$

  • Pressure: 200 bar (Cont.) / 240 bar (Peak)

  • Max Speed: 625 rpm

  • Max Torque: 470 Nm

• OMP 125 (151B-0313):

  • Displacement: 125 $cm^3/rev$

  • Pressure: 140 bar (Cont.) / 175 bar (Peak)

  • Max Speed: 480 rpm

  • Max Torque: 240 Nm

• OMT 500 (151B-3106):

  • Displacement: 500 $cm^3/rev$

  • Pressure: 125 bar (Cont.) / 180 bar (Peak)

  • Max Speed: 155 rpm

  • Max Torque: 1080 Nm

• Control Type: Fixed Displacement HTLS

• Weight Profile: OMS (~10kg), OMT (~20kg), OMP (~7kg)

Key Technical Advantages:

• Optimized Geroler Gear Set: The OMS and OMT series feature Geroler technology with precision-engineered rollers. These rollers reduce startup friction, ensuring smooth operation even at ultra-low speeds and significantly enhancing mechanical efficiency under high-pressure loads.

• Independent Disc Valve Design: In our OMS and OMT models, the disc valve is driven separately from the output shaft. This configuration provides automatic wear compensation, maintaining a superior volumetric seal over thousands of operating hours and reducing internal leakage during high back-pressure operation.

• Heavy-Duty Tapered Roller Bearings: The OMT series is equipped with large tapered roller bearings on the output end. This allows the motor to withstand extreme radial and axial loads, enabling direct drive of gears or winch drums without the need for external bearing supports.

• High-Pressure Shaft Seal: Integrated with premium high-performance shaft seals, our motors can handle significant back pressure without the immediate need for a drain line. This simplifies hydraulic circuitry and prevents external leakage during frequent direction reversals.

Application Areas:

• Agricultural Machinery: Combine harvester reels, seed drill dispensers, and salt spreaders.

• Construction Equipment: Mini-excavator swing drives, road sweepers, and trenchers.

• Industrial Automation: Conveyor belt drives and auxiliary drives for injection molding machines.

• Marine & Off-shore: Fishing winches, anchor windlasses, and hydraulic capstans.

Expert Maintenance Tips:

• Manage Case Pressure: For heavy-duty OMT applications where back pressure consistently exceeds 20 bar, it is highly recommended to connect an external drain line to protect the shaft seal and optimize cooling.

• Pre-start Air Bleeding: Before initial startup, pre-fill the motor housing with clean hydraulic oil. Jog the motor under no load to bleed any trapped air. Running a dry orbital motor at high speed can cause immediate damage to the valve plates.

• Oil Filtration Standards: Maintain a system filtration level of at least ISO 4406 20/18/15. Because orbital motors have tight internal clearances, hard particulates can cause abrasive wear on the gear set, leading to a loss of efficiency.