151-0030 Danfoss OMP 100 Hydraulic Motor 97.3cc SAE A

Product Overview

The 151-0030 is a Danfoss OMP Series 100 displacement low-speed, high-torque orbital hydraulic motor. The OMP Series is Danfoss’s compact, light-duty platform characterized by small-form-factor design and high power density. Covering displacements from 25 cm³/rev to 400 cm³/rev, the OMP Series utilizes proven Geroler rotor-stator technology to deliver smooth low-speed performance under light-to-medium pressure conditions.

This model has a geometric displacement of 97.3 cm³/rev and features a SAE A standard 2-bolt flange mount (82.5 mm pilot diameter, 106.4 mm bolt circle), a 25 mm straight shaft with 8 mm parallel key, G 1/2 BSPP side ports, and a G 1/4 drain port. A high-pressure shaft seal is standard, eliminating the need for a case drain line in most applications. The motor is fully interchangeable with Danfoss OMP 100 original motors and is also cross-compatible with Parker TB0080/TB0100 replacement models. Every unit undergoes 100% simulated load testing prior to shipment.

Technical Specifications 

• Model Number: 151-0030

• Brand / Series: Danfoss OMP Series

• Motor Type: Light-Duty Low-Speed High-Torque (LSHT) Orbital Motor

• Geometric Displacement: 97.3 cm³/rev (5.95 in³/rev)

• Continuous Pressure Differential: 140 bar (2030 psi)

• Maximum Intermittent Pressure: 175 bar (2540 psi)

• Peak Pressure: 225 bar (3260 psi)

• Maximum Continuous Speed: 615 RPM

• Maximum Intermittent Speed: 770 RPM

• Maximum Continuous Output Torque: 182 Nm (1610 lbf in)

• Maximum Intermittent Output Torque: 227 Nm (2010 lbf in)

• Maximum Continuous Output Power: 9.8 kW (13.1 HP)

• Maximum Continuous Flow: 60 L/min (15.8 GPM)

• Mounting Flange: SAE A Standard 2-Bolt Flange, 82.5 mm Pilot, 106.4 mm Bolt Circle

• Output Shaft: 25 mm straight shaft, 8 mm parallel key

• Main Port: G 1/2 BSPP side ports

• Drain Port: G 1/4

• Bearing Type: Hydrodynamic Journal Bearings

• Shaft Seal: High-Pressure Shaft Seal (NBR)

• Housing Material: Cast Iron

• Rotation: Bi-directional

• Weight: Approx. 5.9 kg

• Country of Origin: Denmark

Key Technical Advantages

1. Geroler Rotor-Stator Set — Efficient Power Conversion in a Compact Package

The OMP Series employs Danfoss’s proven Geroler rotor-stator set technology, embedding roller elements into the tooth profile to reduce contact stress and improve oil film formation. Combined with a precision disc valve, it maintains precise commutation timing across the full speed range. The OMP 100 achieves a displacement of 97.3 cm³/rev and 227 Nm intermittent torque output in a compact 5.9 kg package — delivering power density that stands out among motors of comparable size.

2. Hydrodynamic Journal Bearings — Smooth, Low-Noise Operation

The OMP Series utilizes hydrodynamic journal bearings to support the output shaft, offering lower operating noise and smoother rotation characteristics than rolling element bearings. The hydrodynamic effect forms a stable oil film on the bearing surface, effectively reducing friction coefficient and wear rate. This design is particularly suited to noise-sensitive applications such as indoor conveyor systems, food processing equipment, and medical assist devices.

3. High-Pressure Shaft Seal and Compact Structure — Simplified System Architecture

The 151-0030 comes standard with a high-pressure shaft seal, eliminating the need for a case drain line in most applications and simplifying hydraulic system layout. The SAE A 2-bolt flange and 25 mm straight shaft configuration provide broad equipment compatibility, adapting to hydraulic systems and mounting brackets from multiple manufacturers. The compact structural design offers significant advantages in space-constrained installation environments.

4. Precision Machining and High Volumetric Efficiency — Sustained Output Reliability

The rotor, stator, and commutator plate are manufactured using precision CNC machining, with critical mating surface tolerances controlled to micron-level accuracy. Empirical volumetric efficiency exceeds 90% under rated conditions, with stable speed and torque output maintained even after extended continuous operation.

Application Areas

• Agricultural Machinery: Small harvesters, mowers, sprayers, fertilizer spreaders

• Material Handling: Light-duty conveyors, small winches, lift platforms

• Industrial Machinery: Machine tool auxiliary drives, rotary tables, food processing equipment

• Municipal Equipment: Compact sweepers, snow removal attachments

• Specialty Vehicles: Small construction vehicle auxiliary drives

Expert Maintenance Tips

Installation: Before mounting, verify that the SAE A 2-bolt flange pilot (82.5 mm) and mounting face tolerance conform to Danfoss specifications. The pilot should enter the mating bore without force. Shaft-to-coupling alignment must be held within 0.05 mm radial deviation. For G 1/2 BSPP main ports, use appropriate sealing washers and tighten to specified torque. In applications involving higher back pressure, connect the G 1/4 drain port to ensure shaft seal back pressure remains within allowable limits.

Break-In Procedure: After initial installation, operate the motor at no load and 50% rated pressure for 15–20 minutes. Monitor return oil temperature during break-in. After break-in, drain the reservoir and replace the filter element.

Routine Maintenance: Inspect shaft seal and port connections regularly for signs of weeping or leakage. Maintain hydraulic fluid cleanliness at NAS Class 8 or ISO 18/15 or better. Maximum operating temperature should not exceed 80°C. A preventive inspection is recommended every 2,000 operating hours or 12 months.