Choosing The Right Orbital Hydraulic Motor: OMS Series Vs OMP/OMR
Structure features:
◎Advanced stator and rotor parameters design, with low starting pressure, high efficiency and stable low speed operation;
◎High operating pressure and high output torque;
◎Advanced shaft seal design, with high back pressure bearing capacity;
◎Advanced and reliable linkage shaft design, with a long motor service life;
◎Advanced oil distribution mechanism design, with high oil distribution accuracy and automatic wear compensation;
◎The motors can be used in series and parallel; when they are connected in series, they should be connected to the external drain pipe;
◎Tapered roller bearing support design, with a large radial load carrying capacity, so that the motor can be used directly drive the operating mechanism.
- Product Introduction
When it comes to orbital hydraulic motors, not all series are built the same. In our experience, the OMS, OMP, and OMR series each have their own strengths, and selecting the right one can make a significant difference in performance and reliability.
| Main Specification | |||||||||||
| Displacement, cc/r | 63 | 80 | 100 | 125 | 160 | 200 | 250 | 305 | 400 | 500 | |
| Flow, LPM | Cont. | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 |
| Int. | 95 | 95 | 95 | 95 | 115 | 115 | 115 | 115 | 115 | 115 | |
| Speed, RPM | Cont. | 960 | 851 | 739 | 575 | 477 | 385 | 308 | 246 | 191 | 158 |
| Int. | 1150 | 908 | 924 | 719 | 713 | 577 | 462 | 365 | 335 | 230 | |
| Pressure, MPa | Cont. | 17 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 17 | 14 |
| Int. | 21 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 20 | 17 | |
| Torque, Nm | Cont. | 145 | 217 | 271 | 338 | 433 | 541 | 677 | 826 | 888 | 920 |
| Int. | 179 | 260 | 325 | 406 | 520 | 650 | 812 | 885 | 925 | 1026 | |
| Max. allowable back pressure | 14MPa | ||||||||||
The OMS series stands out for its ability to maintain steady torque even under continuous operation at low speeds. We've seen it perform exceptionally well in demanding applications-ranging from agricultural machinery and industrial conveyors to winches and mobile hydraulic equipment. OMP motors, on the other hand, are best suited for high-speed, lighter-load scenarios, while OMR motors are versatile across different flow conditions. In real-world applications, OMS motors often hit the sweet spot between durability, torque, and efficiency.
At our factory, we focus on the components that make these motors perform at their best. Our rotor and stator sets undergo advanced inner cavity grinding, which significantly improves precision and smooth operation. By paying close attention to tolerances and material quality, we ensure that our components meet Europe or the United States standards. The result is a motor that runs reliably, experiences minimal wear, and performs consistently-even under challenging conditions.
For clients looking for dependable hydraulic solutions, combining a well-designed OMS motor with high-quality components from our factory offers a practical advantage. It's not just about technical specs-it's about ensuring smooth operation, long-term reliability, and confidence in every application.
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