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Danfoss OMH200 151H1002 Hydraulic Orbital Motor
Overview
The Danfoss OMH200 151H1002 is a high-performance hydraulic orbital motor from Danfoss‘s OMH series. Designed as a double‑direction (reversible) motor, it efficiently converts hydraulic energy into powerful mechanical rotational power. The OMH series belongs to Danfoss’s medium‑sized motor range, recognized for its compact and lightweight construction, which allows for easy installation in space‑constrained applications while delivering high torque and reliable operation.
Technical Features
Orbital Geroler Design — The motor utilizes an advanced Geroler gear set design with shaft‑distribution flow. This technology ensures smooth operation, high efficiency, and a long service life. The Geroler design is well‑suited for applications requiring both high torque and low rotational speeds, and it provides a high starting torque. With its roller‑based inner gear, the OMH series is engineered to operate reliably under high‑pressure conditions over an extended period.
Displacement & Performance — The motor has a displacement of 200 cm³ per revolution. The OMH series supports displacements ranging from 200 to 500 cm³, and the OMH200 represents the entry point of this medium‑to‑large displacement range. It delivers a maximum continuous torque of 510 N·m, an intermittent torque of 579 N·m, and a peak torque of 651 N·m. The motor also provides a maximum continuous power output of 16 kW and an intermittent output of 18.5 kW.
High Pressure Capability — The OMH200 is built for demanding hydraulic systems, with a maximum continuous pressure drop of 175 bar, a maximum intermittent pressure of 200 bar, and a peak pressure of 225 bar. For applications requiring lower pressures, some configurations offer a continuous pressure rating of 151 bar and an intermittent rating of 190 bar. The motor’s robust construction and high‑pressure shaft seal allow for high return pressure without the need for a separate drain line, simplifying system design.
Flow & Speed Range — The motor operates with a maximum continuous flow rate of 75 L/min and an intermittent flow rate of 90 L/min. It has a minimum rotational speed of 10 rpm and a maximum continuous speed of 370 rpm, with an intermittent maximum of 439 rpm. This wide speed range makes the OMH200 suitable for both slow, high‑torque positioning tasks and faster continuous‑duty applications.
Bi‑Directional Operation — The OMH200 is designed for reversible (bi‑directional) rotation, allowing it to operate in both clockwise and counterclockwise directions. This feature provides flexibility for applications where rotational direction needs to be changed during operation, eliminating the need for complex mechanical reversing mechanisms.
Mounting & Shaft Configuration — The motor features an H‑series standardized mounting flange. The specific OMH200 151H1002 variant is equipped with a straight parallel shaft of 32 mm diameter and an oval flange with four mounting holes (A4 – 4‑bolt, 106.1 mm pitch circle diameter). This robust shaft design efficiently transmits high torque, withstands heavy loads, and offers reliable power transmission for smooth and consistent operation. The flange arrangement ensures easy integration and compatibility with a wide range of hydraulic components and equipment interfaces.
Porting & Sealing — The motor is equipped with G 1/2 inch main port threads (BSP type) and a G 1/4 inch drain port thread. It includes a standard shaft seal and a case drain port, which facilitates proper housing drainage and reduces back pressure risks. The sealing system allows the motor to be used in parallel or series hydraulic circuit configurations.
Compact & Lightweight Construction — The OMH200 features a compact volume that allows for installation in confined spaces and contributes to a high power‑to‑weight ratio. The motor weighs approximately 10.5 kg. The combination of its compact form and lightweight construction simplifies transport, handling, and integration, reducing overall machine weight and improving energy efficiency.
High Efficiency & Long Life — The OMH series delivers smooth running across the entire speed range, constant operating torque over a wide speed range, and high volumetric and mechanical efficiency. Its advanced manufacturing processes produce low start‑up pressure, while the optimized distribution system ensures low noise operation. The motor is constructed from high‑quality materials, uses deep groove ball bearings that can withstand certain axial and radial forces, and undergoes rigorous testing to ensure long‑term performance and resistance to wear. As a result, the OMH200 offers a long service life, minimal downtime, and low maintenance requirements.
Fluid Versatility — The motor is compatible with a wide range of hydraulic fluids, including mineral oils, synthetic oils, and biodegradable fluids. It also operates effectively in both open‑loop and closed‑loop hydraulic systems. This versatility allows the OMH200 to be adapted to diverse system requirements and industry applications.
Core Functionalities
High Torque at Low Speeds — The orbital Geroler design delivers high torque output even at low rotational speeds, making the OMH200 ideal for applications requiring high starting torque and the ability to maintain constant torque across a wide speed range without stalling.
Precise Speed & Position Control — The motor’s broad operating speed range and low minimum speed (10 rpm) enable precise control of actuators and loads, allowing operators to accurately position heavy equipment and regulate process speeds.
Smooth & Quiet Operation — The Geroler gear set and optimized flow distribution ensure low noise output and vibration‑free running across the entire speed range, improving operator comfort and reducing mechanical stress on associated equipment.
Reversible Drive Capability — The bi‑directional design allows the motor to change rotational direction dynamically, supporting applications that require forward‑reverse cycling without additional reversing mechanisms. This simplifies system architecture and reduces component count.
Energy‑Efficient Power Conversion — The motor’s high mechanical and volumetric efficiency minimizes energy losses, reduces heat generation, and lowers overall power consumption. The combination of 200 cm³ displacement and 510 N·m torque output at 175 bar provides an excellent torque‑to‑pressure ratio, maximizing the hydraulic power generated per unit of fluid flow.
Overload Protection via Pressure Limits — The motor’s defined continuous (175 bar), intermittent (200 bar), and peak (225 bar) pressure ratings provide natural overload protection margins. Operators can safely operate within these limits, with peak pressure capability accommodating transient load spikes.
Low Maintenance & Long Service Life — The robust construction, high‑quality materials, advanced sealing, and preventive design features minimize wear and extend service intervals. Regular inspection and lubrication are recommended, and Danfoss provides comprehensive maintenance guidelines and spare parts support.
Application Sectors
The Danfoss OMH200 151H1002 hydraulic orbital motor is designed for a wide range of industrial, agricultural, construction, and material handling applications. Its compact size, high torque output, reversible operation, wide speed range, and bi‑directional rotation capabilities make it a versatile and robust drive solution for demanding mobile and stationary hydraulic systems.
Agriculture & Turf Care
The motor is commonly installed in agricultural and turf‑care equipment, where its ability to deliver high torque at low speeds and withstand demanding outdoor conditions is essential. Its compact and lightweight design simplifies integration into space‑constrained machinery, and its high efficiency contributes to reduced fuel consumption and lower operating costs.
| Equipment | Typical Function |
|---|---|
| Spreaders | Driving the spreading mechanism at controlled rotational speeds for uniform material distribution |
| Balers | Powering the baling mechanism to compress and tie hay or straw into bales |
| Combine Harvesters | Driving feeder houses, augers, and other harvesting mechanisms |
| Planting Equipment | Powering seed metering and planting mechanisms |
| Forage Harvesters | Driving cutting and chopping mechanisms |
| Turf Care & Lawn Maintenance Machinery | Driving cutting decks and traction systems in challenging terrain |
Construction & Earthmoving
The OMH200 is widely deployed in construction and earthmoving equipment, where compact packaging, robust construction, and high torque‑to‑weight ratio are critical. Its bidirectional rotation capability allows excavator attachments to work in both directions for digging and dumping operations, while the wide speed range enables precise control for fine grading and material placement.
| Equipment | Typical Function |
|---|---|
| Mini Excavators | Powering swing drives, track drives, and attachment rotation systems |
| Skid Steer Loaders | Driving auxiliary hydraulic circuits for attachments such as augers and brooms |
| Trenching Machines | Powering cutting wheels and conveyor systems |
| Concrete Mixers | Driving mixing drums and discharge systems |
| Road Rollers | Powering vibration systems and traction drives |
Material Handling & Logistics
In material handling equipment, the OMH200’s compact dimensions and high torque capability enable efficient operation in tight spaces and demanding lifting environments. The motor’s low minimum speed (10 rpm) provides precise positioning of loads, while its smooth operation minimizes load sway and improves safety.
| Equipment | Typical Function |
|---|---|
| Industrial Forklifts | Driving hydraulic systems for lifting and tilting of loads |
| Aerial Lifts | Powering boom articulation and platform levelling systems |
| Winches | Providing traction and lifting power in heavy‑duty hoisting applications |
| Conveyor Systems | Driving belt or chain conveyors in industrial facilities |
| Pallet Stackers | Powering lifting and positioning mechanisms |
Forestry & Municipal Equipment
The OMH200 is well‑suited for forestry and municipal applications where equipment must operate reliably in challenging outdoor environments. Its dual‑bearing radial load architecture, with a radial force capacity exceeding 2000 N, allows it to withstand the high radial forces encountered in applications such as brush cutters and stump grinders.
| Equipment | Typical Function |
|---|---|
| Brush Cutters | Powering cutting heads and mulching mechanisms |
| Wood Chippers | Driving the chipper drum or disc at controlled speeds |
| Forestry Harvesters | Powering feed rollers, delimbing knives, and cutting systems |
| Sweepers & Scrubbers | Driving broom mechanisms and scrubbing brushes |
| Snow Blowers | Powering auger and impeller systems |
| Street Sweepers | Driving main broom and side brushes |
Marine & Offshore
The OMH200’s corrosion‑resistant construction and compatibility with both open‑loop and closed‑loop hydraulic systems make it suitable for marine applications where reliable performance and fluid versatility are required. Its case drain port and standard shaft seal allow for proper housing drainage in inclined or varying installations.
| Equipment | Typical Function |
|---|---|
| Deck Machinery | Powering capstans, windlasses, and mooring winches |
| Fishing Equipment | Driving net drums, line haulers, and pot haulers |
| Offshore Equipment | Powering hydraulic systems on workboats and service vessels |
Industrial & Manufacturing
In industrial environments, the OMH200 contributes to production efficiency and automation through its variable speed capability at constant torque. This provides flexibility for production rate adjustments, reduces waste from inconsistent process speeds, and minimizes startup shock through controlled acceleration.
| 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, tool changers, and auxiliary functions |
| Test Rigs | Providing controlled rotational power for component and materials testing |
Food Processing
The OMH200’s compatibility with biodegradable hydraulic fluids and smooth, low‑noise operation make it suitable for use in food processing environments where contamination risks must be minimized. The motor’s low maintenance requirements and long service life reduce production disruptions in high‑throughput facilities.
| Equipment | Typical Function |
|---|---|
| Mixers & Agitators | Powering mixing paddles and stirring mechanisms |
| Conveyor Systems | Driving product handling belts at consistent speeds |
| Packaging Equipment | Powering filling, sealing, and labelling systems |
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Danfoss |
| Series | OMH (Geroler orbital motor) |
| Model Code | OMH200 151H1002 |
| Displacement | 200 cm³/rev |
| Maximum Continuous Pressure Drop | 175 bar |
| Maximum Intermittent Pressure Drop | 200 bar |
| Peak Pressure | 225 bar |
| Maximum Continuous Torque | 510 N·m |
| Maximum Intermittent Torque | 579 N·m |
| Peak Torque | 651 N·m |
| Maximum Continuous Output Power | 16 kW |
| Maximum Intermittent Output Power | 18.5 kW |
| Maximum Continuous Flow Rate | 75 L/min |
| Maximum Intermittent Flow Rate | 90 L/min |
| Minimum Speed | 10 rpm |
| Maximum Continuous Speed | 370 rpm |
| Maximum Intermittent Speed | 439 rpm |
| Shaft Type | 32 mm straight parallel shaft (cylindrical) |
| Flange Type | Oval, 4‑bolt (SAE A4, 106.1 mm PCD) |
| Operation | Bi‑directional (reversible) |
| Main Port Thread | G 1/2 inch (BSP) |
| Drain Port Thread | G 1/4 inch (BSP) |
| Weight | Approx. 10.5 kg |
| Fluid Compatibility | Mineral oils, synthetic oils, biodegradable fluids |
| Circuit Compatibility | Open‑loop and closed‑loop systems |
Conclusion
The Danfoss OMH200 151H1002 is a robust, high‑torque, medium‑displacement orbital hydraulic motor that exemplifies Danfoss's decades of expertise in low‑speed, high‑torque motor technology. With its 200 cm³ displacement, advanced Geroler gear set design, shaft‑distribution flow, and high‑pressure capability (175 bar continuous, 225 bar peak), it delivers exceptional power density, precise speed control, and reliable operation in a wide range of demanding hydraulic applications.
Its defining features include high starting torque, constant operating torque across a wide speed range, smooth and quiet operation, bidirectional rotation capability, compact and lightweight construction (10.5 kg), and a 32 mm straight parallel shaft with a four‑bolt oval mounting flange. These attributes make the OMH200 an ideal solution for applications requiring powerful, efficient, and reliable rotary actuation — from agricultural spreaders and balers, construction mini‑excavators and skid steer loaders, and material handling winches and forklifts, to industrial conveyors, forestry chippers, marine deck machinery, and food processing equipment.
As a proven, reliable, compact, and energy‑efficient solution for open‑loop and closed‑loop hydraulic systems worldwide, the Danfoss OMH200 151H1002 stands out as a versatile component where controlled torque, wide speed range, reversible operation, and long‑term dependability are essential requirements.
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