BMP OMP 36-500 Hydraulic Motor | Danfoss OMP Interchangeable LSHT

Product Overview

The BMP/OMP Series hydraulic motor (including the BM1 series, covering 11 displacements from 36cc to 500cc) is a high-performance low-speed high-torque orbital motor featuring shaft distribution design with an advanced Gerotor gear set. Engineered for medium-pressure, medium-load industrial applications, this series is 100% interchangeable with Danfoss OMP/OMR, M+S MP/HP, Eaton H/T, and OMEW/TMT/TMK series motors — requiring no modification to mounting flanges, port threads, or output shaft dimensions.

The BM1, BMP, and OMP series share identical mounting dimensions and performance parameters for direct drop-in replacement. With a compact design and high power density, the series achieves maximum continuous torque of 385 N·m, peak torque of 680 N·m, and maximum continuous speed of 1500 rpm, making it a cost-effective solution for compact hydraulic drive systems. Every motor undergoes 100% simulated real-world condition testing before shipment.

Technical Specifications 

BMP 36:

• Geometric Displacement: 36 cm³/rev

• Max. Speed (Continuous): 1500 rpm

• Max. Speed (Intermittent): 1650 rpm

• Max. Torque (Continuous): 55 N·m

• Max. Torque (Intermittent): 76 N·m

• Max. Peak Torque: 96 N·m

• Max. Output (Continuous): 8.0 kW

• Max. Pressure Drop (Continuous): 12.5 MPa

• Max. Pressure Drop (Intermittent): 16.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 55 L/min

• Net Weight: 5.6 kg

BMP 50:

• Geometric Displacement: 51.7 cm³/rev

• Max. Speed (Continuous): 1150 rpm

• Max. Speed (Intermittent): 1450 rpm

• Max. Torque (Continuous): 100 N·m

• Max. Torque (Intermittent): 128 N·m

• Max. Peak Torque: 148 N·m

• Max. Output (Continuous): 10.0 kW

• Max. Pressure Drop (Continuous): 14 MPa

• Max. Pressure Drop (Intermittent): 17.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 5.6 kg

BMP 80:

• Geometric Displacement: 77.7 cm³/rev

• Max. Speed (Continuous): 770 rpm

• Max. Speed (Intermittent): 960 rpm

• Max. Torque (Continuous): 146 N·m

• Max. Torque (Intermittent): 186 N·m

• Max. Peak Torque: 218 N·m

• Max. Output (Continuous): 10.0 kW

• Max. Pressure Drop (Continuous): 14 MPa

• Max. Pressure Drop (Intermittent): 17.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 5.7 kg

BMP 100:

• Geometric Displacement: 96.2 cm³/rev

• Max. Speed (Continuous): 615 rpm

• Max. Speed (Intermittent): 770 rpm

• Max. Torque (Continuous): 182 N·m

• Max. Torque (Intermittent): 227 N·m

• Max. Peak Torque: 264 N·m

• Max. Output (Continuous): 11.0 kW

• Max. Pressure Drop (Continuous): 14 MPa

• Max. Pressure Drop (Intermittent): 17.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 5.9 kg

BMP 125:

• Geometric Displacement: 120.2 cm³/rev

• Max. Speed (Continuous): 490 rpm

• Max. Speed (Intermittent): 615 rpm

• Max. Torque (Continuous): 236 N·m

• Max. Torque (Intermittent): 290 N·m

• Max. Peak Torque: 360 N·m

• Max. Output (Continuous): 10.0 kW

• Max. Pressure Drop (Continuous): 14 MPa

• Max. Pressure Drop (Intermittent): 17.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 6.0 kg

BMP 160:

• Geometric Displacement: 157.2 cm³/rev

• Max. Speed (Continuous): 383 rpm

• Max. Speed (Intermittent): 475 rpm

• Max. Torque (Continuous): 302 N·m

• Max. Torque (Intermittent): 370 N·m

• Max. Peak Torque: 434 N·m

• Max. Output (Continuous): 10.0 kW

• Max. Pressure Drop (Continuous): 14 MPa

• Max. Pressure Drop (Intermittent): 17.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 6.2 kg

BMP 200:

• Geometric Displacement: 194.5 cm³/rev

• Max. Speed (Continuous): 310 rpm

• Max. Speed (Intermittent): 385 rpm

• Max. Torque (Continuous): 360 N·m

• Max. Torque (Intermittent): 440 N·m

• Max. Peak Torque: 540 N·m

• Max. Output (Continuous): 10.0 kW

• Max. Pressure Drop (Continuous): 14 MPa

• Max. Pressure Drop (Intermittent): 17.5 MPa

• Max. Peak Pressure: 22.5 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 6.4 kg

BMP 250:

• Geometric Displacement: 240.3 cm³/rev

• Max. Speed (Continuous): 250 rpm

• Max. Speed (Intermittent): 310 rpm

• Max. Torque (Continuous): 380 N·m

• Max. Torque (Intermittent): 460 N·m

• Max. Peak Torque: 550 N·m

• Max. Output (Continuous): 8.5 kW

• Max. Pressure Drop (Continuous): 11 MPa

• Max. Pressure Drop (Intermittent): 14 MPa

• Max. Peak Pressure: 18 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 6.7 kg

BMP 315:

• Geometric Displacement: 314.5 cm³/rev

• Max. Speed (Continuous): 192 rpm

• Max. Speed (Intermittent): 240 rpm

• Max. Torque (Continuous): 375 N·m

• Max. Torque (Intermittent): 555 N·m

• Max. Peak Torque: 650 N·m

• Max. Output (Continuous): 7.0 kW

• Max. Pressure Drop (Continuous): 9 MPa

• Max. Pressure Drop (Intermittent): 14 MPa

• Max. Peak Pressure: 16 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 6.9 kg

BMP 400:

• Geometric Displacement: 389.5 cm³/rev

• Max. Speed (Continuous): 155 rpm

• Max. Speed (Intermittent): 190 rpm

• Max. Torque (Continuous): 360 N·m

• Max. Torque (Intermittent): 525 N·m

• Max. Peak Torque: 680 N·m

• Max. Output (Continuous): 6.0 kW

• Max. Pressure Drop (Continuous): 7 MPa

• Max. Pressure Drop (Intermittent): 10.5 MPa

• Max. Peak Pressure: 14 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 7.4 kg

BMP 500:

• Geometric Displacement: 486.5 cm³/rev

• Max. Speed (Continuous): 120 rpm

• Max. Speed (Intermittent): 150 rpm

• Max. Torque (Continuous): 385 N·m

• Max. Torque (Intermittent): 560 N·m

• Max. Peak Torque: 680 N·m

• Max. Output (Continuous): 5.0 kW

• Max. Pressure Drop (Continuous): 6 MPa

• Max. Pressure Drop (Intermittent): 9 MPa

• Max. Peak Pressure: 12 MPa

• Max. Flow (Continuous): 60 L/min

• Net Weight: 8.0 kg

General Specifications:

• Control Type: Shaft Distribution with Gerotor gear set design

• Mounting Flange: 2-bolt SAE-A flange

• Shaft Options: Ø25mm cylindrical / Ø1in cylindrical / 1in splined

• Main Port Connection: G1/2

• Rotation: Bi-directional

• Bearing Type: Deep groove ball bearing (can bear certain axial and radial loads)

• Shaft Seal: High-pressure oil seal (suitable for series/parallel use)

• Interchangeable With: Danfoss OMP/OMR, M+S MP/HP, Eaton H/T, OMEW/TMT/TMK series

Key Technical Advantages

1. Shaft Distribution Design with Precision Gerotor Gear Set

The shaft distribution design combined with a high-precision Gerotor (internal gear-roller) gear set and integrated output shaft/distribution mechanism delivers compact volume and high power density. Advanced manufacturing processes ensure precise gear set fitting for high volumetric efficiency and extended service life. This design provides low starting pressure, smooth reliable operation, and high efficiency.

2. High-Pressure Shaft Seal with Series/Parallel Compatibility

The high-pressure shaft seal design enables the output shaft seal to withstand high motor return pressures, supporting series or parallel motor configurations in open or closed loop hydraulic systems. The deep groove ball bearing output shaft accommodates certain axial and radial loads, suitable for direct drive of gears, sprockets, or pulleys.

3. Compact Lightweight Design with Easy Installation

The BMP series features compact volume and low weight — the lightest models (BMP 36/50) weigh only 5.6 kg — making them easy to install in space-constrained equipment. The 2-bolt SAE-A standard flange and G1/2 port design ensure high standardization for compatibility with most small-to-medium hydraulic systems. Special driver-linker design extends operating life.

4. 100% Multi-Platform Plug-and-Play Interchangeability

The BM1, BMP, and OMP series share identical mounting dimensions and performance parameters for direct replacement. Mounting flange bolt patterns, output shaft dimensions, and port thread specifications are fully matched to Danfoss OMP/OMR, M+S MP/HP, and Eaton H/T series, with compatibility for OMEW/TMT/TMK series interfaces. Customers can complete drop-in replacement without modifying existing hydraulic piping or mounting brackets.

Application Areas

• Agricultural Machinery: Mower deck drives, irrigation winches, compact tractor attachment drives

• Material Handling: Forklift attachment drives, light-duty belt conveyors, light winches

• Sanitation Equipment: Street sweeper brush drives, compact snow removal equipment

• Construction Machinery: Compact skid steer attachment drives, mini excavator swing drives

• Industrial Equipment: Injection molding machine auxiliary drives, textile machinery, food processing equipment drives

• Marine Machinery: Compact deck machinery, fishing vessel auxiliary winches

Expert Maintenance Tips

1. Pre-Installation System Flushing

Prior to installation, flush the hydraulic system piping to achieve a cleanliness level of NAS 9 (ISO 18/15) or better. Install a 10μm nominal filtration rating pressure line filter at the motor inlet to prevent particulate contaminants from entering the distribution clearance.

2. Initial Start-Up Air Bleeding

After initial installation or motor replacement, loosen the drain port fitting to bleed air from the motor. Operate at no load and no more than 500 rpm for 5-10 minutes until a steady flow of oil is observed at the drain port before applying load. For series configurations, ensure each motor’s drain port is properly connected.

3. Drain Line Back Pressure Control

The drain port back pressure must not exceed 0.5 MPa (5 bar). Route the drain line separately to the reservoir below oil level. In series configurations, ensure downstream motor back pressure does not exceed the shaft seal capacity of upstream motors.

4. Fluid Cleanliness and Change Interval

Use anti-wear hydraulic oil with viscosity grade ISO VG 32-68. Replace the filter element after the first 500 hours of operation, then every 2,000 operating hours or annually, whichever comes first. Periodically test fluid contamination levels; if NAS class exceeds 10, change the oil immediately.

5. Long-Term Storage Protection

For storage exceeding 3 months, fill the motor internal cavity with clean hydraulic oil and cap all ports to prevent internal corrosion. Before re-commissioning, manually rotate the output shaft 2-3 turns to confirm free rotation before applying hydraulic power. For deep groove ball bearing models, inspect bearing lubrication condition after extended storage.