151-0310 Danfoss OMP 50 Orbital Hydraulic Motor

Product Overview

The Danfoss OMP Series is a proven range of LSHT (Low-Speed High-Torque) orbital hydraulic motors designed for agricultural machinery, mobile equipment, conveyors, harvesting equipment and compact industrial rotary drives.

The requested configurations are:

• OMP 50 — 151-0310
• OMP 80 — 151-0311
• OMP 100 — 151-0612
• OMP 125 — 151-0313

Danfoss PowerSource confirms the exact part-number identity of each configuration. The products are historical/discontinued references, but Danfoss continues to retain service information and technical documentation. The OMP 125 part number 151-0313 is specifically listed with 11185743 as its recommended replacement.

Official Danfoss OMP technical data specifies:

• OMP 50: 48.6 cm³/rev
• OMP 80: 77.8 cm³/rev
• OMP 100: 97.3 cm³/rev
• OMP 125: 125.0 cm³/rev

The OMP platform uses a fixed-displacement orbital architecture in which hydraulic flow determines motor speed and differential pressure determines available torque.

Technical Specifications

OMP 50 — 151-0310

• Brand: Danfoss / Sauer-Danfoss
• Series: OMP
• Product Type: LSHT Orbital Hydraulic Motor
• Part Number: 151-0310
• Motor Size: OMP 50
• Geometric Displacement: 48.6 cm³/rev
• Displacement: 2.97 in³/rev
• Maximum Continuous Speed: 1,230 rpm
• Maximum Intermittent Speed: 1,540 rpm
• Maximum Continuous Torque: 93 Nm
• Maximum Intermittent Torque: 120 Nm
• Maximum Continuous Output: 10.0 kW
• Maximum Intermittent Output: 12.0 kW
• Maximum Continuous Differential Pressure: 140 bar / 2,030 psi
• Maximum Intermittent Differential Pressure: 175 bar / 2,540 psi
• Peak Differential Pressure: 225 bar / 3,260 psi
• Maximum Continuous Flow: 60 L/min
• Maximum Intermittent Flow: 75 L/min
• Maximum Starting Pressure with Unloaded Shaft: 10 bar / 145 psi
• Minimum Starting Torque at Maximum Continuous Pressure Drop: 80 Nm
• Minimum Starting Torque at Maximum Intermittent Pressure Drop: 100 Nm

OMP 80 — 151-0311

• Brand: Danfoss / Sauer-Danfoss
• Series: OMP
• Product Type: LSHT Orbital Hydraulic Motor
• Part Number: 151-0311
• Motor Size: OMP 80
• Geometric Displacement: 77.8 cm³/rev
• Displacement: 4.76 in³/rev
• Maximum Continuous Speed: 770 rpm
• Maximum Intermittent Speed: 960 rpm
• Maximum Continuous Torque: 150 Nm
• Maximum Intermittent Torque: 190 Nm
• Maximum Continuous Output: 10.0 kW
• Maximum Intermittent Output: 12.0 kW
• Maximum Continuous Differential Pressure: 140 bar / 2,030 psi
• Maximum Intermittent Differential Pressure: 175 bar / 2,540 psi
• Peak Differential Pressure: 225 bar / 3,260 psi
• Maximum Continuous Flow: 60 L/min
• Maximum Intermittent Flow: 75 L/min
• Maximum Starting Pressure with Unloaded Shaft: 10 bar / 145 psi
• Minimum Starting Torque at Maximum Continuous Pressure Drop: 135 Nm
• Minimum Starting Torque at Maximum Intermittent Pressure Drop: 170 Nm

OMP 100 — 151-0612

• Brand: Danfoss / Sauer-Danfoss
• Series: OMP
• Product Type: LSHT Orbital Hydraulic Motor
• Part Number: 151-0612
• Motor Size: OMP 100
• Geometric Displacement: 97.3 cm³/rev
• Displacement: 5.95 in³/rev
• Maximum Continuous Speed: 615 rpm
• Maximum Intermittent Speed: 770 rpm
• Maximum Continuous Torque: 190 Nm
• Maximum Intermittent Torque: 230 Nm
• Maximum Continuous Output: 11.0 kW
• Maximum Intermittent Output: 13.0 kW
• Maximum Continuous Differential Pressure: 140 bar / 2,030 psi
• Maximum Intermittent Differential Pressure: 175 bar / 2,540 psi
• Peak Differential Pressure: 225 bar / 3,260 psi
• Maximum Continuous Flow: 60 L/min
• Maximum Intermittent Flow: 75 L/min
• Maximum Starting Pressure with Unloaded Shaft: 10 bar / 145 psi
• Minimum Starting Torque at Maximum Continuous Pressure Drop: 170 Nm
• Minimum Starting Torque at Maximum Intermittent Pressure Drop: 210 Nm
• PowerSource Published Dimensions: L13.8 × W28.6 × H11.6 cm

OMP 125 — 151-0313

• Brand: Danfoss / Sauer-Danfoss
• Series: OMP
• Product Type: LSHT Orbital Hydraulic Motor
• Part Number: 151-0313
• Motor Size: OMP 125
• Geometric Displacement: 125.0 cm³/rev
• Displacement: 7.63 in³/rev
• Maximum Continuous Speed: 475 rpm
• Maximum Intermittent Speed: 600 rpm
• Maximum Continuous Torque: 240 Nm
• Maximum Intermittent Torque: 290 Nm
• Maximum Continuous Output: 10.0 kW
• Maximum Intermittent Output: 12.0 kW
• Maximum Continuous Differential Pressure: 140 bar / 2,030 psi
• Maximum Intermittent Differential Pressure: 175 bar / 2,540 psi
• Peak Differential Pressure: 225 bar / 3,260 psi
• Maximum Continuous Flow: 60 L/min
• Maximum Intermittent Flow: 75 L/min
• Maximum Starting Pressure with Unloaded Shaft: 10 bar / 145 psi
• Minimum Starting Torque at Maximum Continuous Pressure Drop: 210 Nm
• Minimum Starting Torque at Maximum Intermittent Pressure Drop: 270 Nm
• Product Status: Discontinued
• Recommended Replacement: 11185743

Control Method

The OMP family uses a fixed-displacement orbital motor architecture.

The basic engineering relationship is:

Hydraulic Flow → Motor Speed

Differential Pressure × Displacement → Available Output Torque

Therefore:

• Displacement: Fixed
• Speed Control: Hydraulic flow
• Torque Control: Differential pressure
• Rotation Direction: Hydraulic flow direction
• Variable Displacement: Not integrated
• Typical Circuit: Open or closed hydraulic circuit depending on the configuration

Danfoss documentation also identifies multiple shaft, flange, port, shaft-seal and check-valve configurations throughout the OMP platform.

Key Technical Advantages

1. LSHT Orbital Powertrain

The OMP platform uses substantial displacement to produce useful torque at relatively low rotational speed.

Published displacements are:

• OMP 50: 48.6 cm³/rev
• OMP 80: 77.8 cm³/rev
• OMP 100: 97.3 cm³/rev
• OMP 125: 125.0 cm³/rev

2. Smooth Low-Speed Operation

Danfoss identifies smooth running throughout the speed range, constant operating torque over a wide speed range, high starting torque, high efficiency and long life under demanding conditions as key orbital-motor characteristics.

3. Multiple Shaft and Mounting Interfaces

The OMP platform supports different configurations including:

• 25 mm cylindrical shafts
• 1 in cylindrical shafts
• 1 in splined shafts
• 2-hole oval flanges
• 4-hole oval flanges
• Wheel configurations
• BSP, UNF and NPTF port versions

This provides flexibility for OEM integration and replacement projects.

4. External Shaft-Load Capability

Danfoss technical documentation explicitly provides permissible radial shaft-load calculations based on load distance, speed, mounting flange and shaft version.

This is important for drives using:

• Sprockets
• Pulleys
• Gears
• Wheels

5. Configurable Sealing and Check-Valve Options

The broader OMP configuration system includes standard and high-pressure shaft seals, drain connections and check-valve options.

6. Strong Aftermarket Relevance

Danfoss continues to maintain historical PowerSource records for the requested part numbers. The discontinued OMP 125 part 151-0313 even has an official recommended replacement, 11185743.

This makes the OMP family highly relevant to:

• OEM replacement
• Retrofit
• Aftermarket service
• Fleet maintenance
• Legacy machinery restoration

Application Areas

OMP 50 — 151-0310

• Agricultural machinery
• Compact conveyors
• Harvesting equipment
• Mobile attachments
• Material handling systems
• Light industrial rotary drives

OMP 80 — 151-0311

• Agricultural machinery
• Conveyor systems
• Harvesting equipment
• Sweepers
• Mobile hydraulic equipment
• Compact construction equipment

OMP 100 — 151-0612

• Agricultural machinery
• Material handling
• Conveyors
• Mobile machinery
• Rotary attachments
• Industrial auxiliary drives

OMP 125 — 151-0313

• Agricultural machinery
• Harvesting equipment
• Conveyors
• Material handling equipment
• Mobile machinery
• Industrial rotary drives

Danfoss identifies orbital-motor applications across construction equipment, agricultural equipment, material handling and lifting equipment, forestry equipment, lawn and turf equipment, machine tools, stationary equipment, marine equipment and special-purpose machinery.

Expert Maintenance Tips

1. Specify the Complete Part Number

Use:

151-0310

151-0311

151-0612

151-0313

rather than specifying only OMP 50, OMP 80, OMP 100 or OMP 125. Danfoss maintains separate product records for the individual references.

2. Respect the Speed Difference Between Sizes

Danfoss OMP data shows:

• OMP 50 → 1,230 rpm continuous
• OMP 80 → 770 rpm
• OMP 100 → 615 rpm
• OMP 125 → 475 rpm

The speed capability therefore cannot be transferred from one displacement size to another.

3. Do Not Use the 225-bar Peak Rating as a Continuous Rating

For the OMP 50–125 sizes, the published motor-size pressure levels are:

• Continuous differential pressure: 140 bar
• Intermittent differential pressure: 175 bar
• Peak differential pressure: 225 bar

Danfoss defines:

Intermittent operation = maximum 10% of every minute

Peak load = maximum 1% of every minute

4. Verify Shaft Alignment

Before installation, check:

• Shaft concentricity
• Pilot fit
• Coupling alignment
• Mounting-face flatness
• Key/spline engagement
• Shaft runout

Poor alignment can increase bearing loads and accelerate shaft-seal failure.

5. Calculate External Shaft Loads

For sprocket, pulley, gear or wheel applications, calculate:

Radial Load + Load Distance + Shaft Speed + Bearing Life

Danfoss provides dedicated permissible shaft-load information for OMP/OMR configurations.

6. Maintain Hydraulic-Fluid Cleanliness

Routine maintenance should monitor:

• Hydraulic-fluid cleanliness
• Filter condition
• Oil viscosity
• Oil temperature
• Return pressure
• Internal leakage

7. Note the Discontinued Status of 151-0313

Danfoss PowerSource identifies 151-0313 as discontinued and lists 11185743 as the recommended replacement.

For an aftermarket page, it is therefore more accurate to describe 151-0313 as a legacy/replacement reference rather than a current-production Danfoss part.

8. Perform 100% Simulated Operating-Condition Testing

For replacement OMP 50 / 80 / 100 / 125 motors, our recommended factory QA program includes:

• Displacement verification
• Pressure testing
• Flow testing
• Speed verification
• Starting-torque testing
• Continuous-torque testing
• Internal-leakage testing
• Rotation-direction testing
• Shaft runout inspection
• Key/spline inspection
• Bearing inspection
• Return-pressure verification
• Temperature-rise testing
• Noise and vibration testing
• Complete configuration verification

The final validation baseline should be matched individually to:

151-0310 → OMP 50

151-0311 → OMP 80

151-0612 → OMP 100

151-0313 → OMP 125

rather than using one generic “OMP Series maximum” specification for every motor.