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Danfoss OMP200 151-0615 Hydraulic Orbital Motor
Overview
The Danfoss OMP200 151-0615 is a compact, medium-duty orbital motor from Danfoss's OMP series. Designed for light-duty to medium-duty applications, it efficiently converts hydraulic energy into reliable mechanical rotational power. Its gerotor gear set provides smooth, consistent torque, making it suitable for mobile and stationary hydraulic systems where space is limited and moderate power is required.
Technical Features
Gerotor Gear Set Design – The motor uses a proven gerotor (orbital) principle, delivering high torque at low rotational speeds. OMP series motors cover a displacement range from 8 cm³ to 800 cm³, and this 200 model represents the larger end of the compact OMP family.
Medium Displacement – The OMP200 has a displacement of 194.6 cm³ per revolution, providing substantial torque output while maintaining a compact package.
Pressure Ratings – The motor operates with a maximum continuous pressure drop of 100 bar, an intermittent pressure drop of 125 bar, and a peak pressure drop of 140 bar. The maximum continuous inlet pressure is 175 bar, with an intermittent rating of 200 bar and a peak of 225 bar, offering sufficient overhead for transient high-load conditions.
Torque Output – The motor delivers a maximum continuous torque of 350 Nm, an intermittent torque of 440 Nm, and a peak torque capability. The torque output remains consistent across its operating speed range, ensuring reliable performance regardless of speed.
Flow & Speed Range – The OMP200 operates with a maximum continuous flow rate of 60 L/min. It has a maximum continuous speed of 308 rpm and a maximum intermittent speed of 385 rpm, positioning it as a low-speed, high-torque (LSHT) motor ideal for heavy-duty rotational tasks rather than high-speed applications. The minimum stable speed can go as low as 10-15 rpm, allowing precise positioning of loads.
Bi-Directional Operation – Designed as a true bi-directional motor, the OMP200 151-0615 operates equally in clockwise and counter-clockwise rotation by simply reversing the hydraulic flow direction, offering flexible system design for reversible drive applications without additional mechanical reversing mechanisms.
Shaft & Mounting Configuration – The motor features a Ø32 mm cylindrical shaft with a Woodruff key, and a 2-bolt SAE A mounting flange (Ø82.55 mm pilot diameter, Ø106.4 mm bolt circle), ensuring easy integration with standard hydraulic components and equipment interfaces.
Porting – The motor is equipped with G 1/2 BSPP main ports and a G 1/4 BSPP drain port, providing compatibility with common hydraulic fittings.
Lightweight Construction – The OMP200 weighs approximately 6.4 kg. The OMP series motors are constructed with lightweight materials to facilitate easy handling and installation, while the aluminum housing provides sufficient durability for moderate-duty applications.
High Starting Torque – The gerotor design provides high starting torque, ensuring smooth and reliable operation even under heavy loads or in challenging working conditions. The starting torque is 93% of the maximum continuous torque, demonstrating excellent starting efficiency.
Fluid Versatility – The motor is compatible with a wide range of hydraulic fluids, including mineral oils, synthetic oils, and biodegradable fluids, making it suitable for diverse industrial applications where environmental considerations are important.
Efficient Sealing System – The motor's design incorporates effective sealing elements with advanced axial seal design, providing high back pressure tolerance, which helps improve the life and reliability of the motor and prevents leakage over extended periods.
High Radial Load Capacity – The OMP series supports radial loads up to 2200 Newtons and maintains radial runout ≤0.03 mm for vibration-free operation up to 3500 rpm.
Core Functionalities
LSHT Performance – The motor's low-speed, high-torque (LSHT) characteristics allow it to deliver substantial torque at low rotational speeds, eliminating the need for gearboxes in many applications. The torque output is stable across the entire speed range.
Stepless Speed Regulation – Because output speed is directly proportional to hydraulic flow, controlling a simple flow control valve gives infinitely variable motor speed in both forward and reverse directions, eliminating complex mechanical transmissions.
Smooth & Quiet Operation – The OMP200 runs smoothly across its entire operating speed range, with minimal noise and vibration, enhancing operator comfort and reducing mechanical stress on associated equipment.
Reversible Drive Capability – The bi-directional design allows the motor to change rotational direction instantly by reversing the flow, supporting applications that require forward-reverse cycling without additional components.
Energy-Efficient Power Conversion – The combination of 194.6 cm³ displacement and 350 Nm torque output at 100 bar provides an excellent torque-to-pressure ratio, maximizing the hydraulic power generated per unit of fluid flow.
Low Maintenance & Long Service Life – The robust gerotor gear set, quality seals, and lightweight construction minimize wear. Routine inspection and fluid cleanliness (ISO 4406 class 20/18/15) are recommended to maximize life. The motor's advanced axial seal design improves reliability and extends service intervals.
Application Sectors
The Danfoss OMP200 151-0615 is designed for a wide range of light-duty to medium-duty industrial and mobile applications where moderate torque, smooth operation, and compact size are required.
Agriculture & Turf Care
The OMP200 is commonly used in agricultural machinery where its ability to deliver moderate torque at low speeds and withstand outdoor conditions is essential. Its compact and lightweight design simplifies integration into space-constrained machinery.
| Equipment | Typical Function |
|---|---|
| Spreaders | Driving the spreading mechanism at controlled rotational speeds |
| Balers | Powering baling mechanisms for hay and straw |
| Combine Harvesters | Driving feeder houses, augers, and harvesting mechanisms |
| Planting Equipment | Powering seed metering and planting mechanisms |
| Turf Care & Lawn Maintenance Machinery | Driving cutting decks and traction systems |
Construction & Earthmoving
The OMP200 is deployed in light to medium construction equipment where compact packaging, robust construction, and moderate torque-to-weight ratio are critical.
| Equipment | Typical Function |
|---|---|
| Mini Excavators | Powering auxiliary hydraulic attachments (augers, compactors) |
| Skid Steer Loaders | Driving auxiliary hydraulic circuits |
| Backhoe Loaders | Powering attachment rotation systems |
| Small Trenchers | Driving cutting chain mechanisms |
Material Handling & Logistics
In material handling equipment, the OMP200's compact dimensions and moderate torque capability enable efficient operation in tight spaces and demanding lifting environments.
| Equipment | Typical Function |
|---|---|
| Forklifts | Driving hydraulic systems for lifting and tilting |
| Aerial Work Platforms | Powering boom articulation and platform levelling |
| Conveyor Systems | Driving belt or chain conveyors in industrial facilities |
| Pallet Stackers | Powering lifting and positioning mechanisms |
Forestry & Municipal Equipment
The OMP200 is suited for forestry and municipal applications where equipment must operate reliably in outdoor environments and side-loading capacity is required.
| Equipment | Typical Function |
|---|---|
| Brush Cutters | Powering cutting heads and mulching mechanisms |
| Wood Chippers | Driving the chipper drum or disc at controlled speeds |
| Log Splitters | Powering splitting wedges for log processing |
| Sweepers & Scrubbers | Driving broom mechanisms |
| Snow Blowers | Powering auger and impeller systems |
Industrial & Manufacturing
In industrial environments, the OMP200 contributes to production efficiency and automation through its variable speed capability at constant torque.
| Equipment | Typical Function |
|---|---|
| Industrial Conveyors | Driving belt, chain, or roller conveyors at consistent speeds |
| Packaging Machinery | Powering wrapping, sealing, and palletizing systems |
| Machine Tools | Driving indexing tables and tool changers |
| Mixers & Agitators | Powering mixing paddles for industrial processing |
| Test Rigs | Providing controlled rotational power for component testing |
Marine & Small Vessel Equipment
The OMP200's compact design and compatibility with both open-loop and closed-loop hydraulic systems make it suitable for marine applications where space is limited.
| Equipment | Typical Function |
|---|---|
| Deck Machinery | Powering capstans and mooring winches |
| Fishing Equipment | Driving net drums and line haulers |
| Steering Gear | Powering auxiliary steering systems |
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Danfoss / Sauer-Danfoss |
| Series | OMP |
| Model Code | OMP200 151-0615 |
| Displacement | 194.6 cm³/rev |
| Maximum Continuous Speed | 308 rpm |
| Maximum Intermittent Speed | 385 rpm |
| Minimum Stable Speed | 10-15 rpm |
| Maximum Continuous Pressure Drop | 100 bar |
| Maximum Intermittent Pressure Drop | 125 bar |
| Maximum Peak Pressure Drop | 140 bar |
| Maximum Continuous Inlet Pressure | 175 bar |
| Maximum Intermittent Inlet Pressure | 200 bar |
| Maximum Peak Inlet Pressure | 225 bar |
| Maximum Continuous Torque | 350 Nm |
| Maximum Intermittent Torque | 440 Nm |
| Maximum Continuous Flow | 60 L/min |
| Maximum Output Power | 11 kW |
| Shaft Type | Ø32 mm cylindrical with Woodruff key |
| Flange Type | SAE A 2-bolt (Ø82.55 mm pilot, Ø106.4 mm PCD) |
| Main Port Thread | G 1/2 BSPP |
| Drain Port Thread | G 1/4 BSPP |
| Rotation | Bi-directional (reversible) |
| Housing Material | Aluminum |
| Weight | 6.4 kg |
| Circuit Compatibility | Open-loop and closed-loop systems |
| Replacement Part Number | 11186708 (OMP X 200 series) |
Conclusion
The Danfoss OMP200 151-0615 is a compact, reliable, moderate-displacement orbital hydraulic motor from Danfoss's OMP series. With 194.6 cm³ displacement, maximum continuous torque of 350 Nm, and a pressure rating of up to 225 bar peak, it delivers consistent, low-speed rotary power for light-duty to medium-duty hydraulic applications.
Its defining features include high starting torque, smooth and quiet operation across the speed range, bi-directional rotation, compact lightweight construction (6.4 kg), standard SAE A 2-bolt mounting, and G 1/2 BSPP ports. These attributes make the OMP200 an ideal solution for applications requiring moderate, reliable rotary actuation — from agricultural spreaders and balers, construction mini-excavators and skid steer loaders, and material handling forklifts and conveyors, to industrial machinery, forestry chippers, and municipal sweepers.
As a proven, reliable, and energy-efficient solution for LSHT applications, the Danfoss OMP200 151-0615 delivers consistent torque, reversible operation, and long-term dependability for machinery worldwide. The OMP X 200 series (replacement part number 11186708) offers enhanced performance, with up to 15% more torque, improved starting efficiency, and better radial load capacity compared to the original OMP design.
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