Gerotor Sets: The Starting Point of Smooth Steering and Reliable Motors
Dec 12, 2025| People who work with hydraulic steering units or orbital motors usually know this already, but it's still worth saying clearly: the Gerotor set is where everything starts. If the rotor and stator don't run right, nothing downstream will feel right either.
Gerotor set
Gerotor sets are commonly used in this type of hydraulic steering gear. Our company produces Gerotor sets using an internal cavity grinding process, which differs from powder metallurgy materials and processing techniques, ensuring the performance and stability of the steering gear.
Gerotor sets are commonly used in the manufacture of some small orbital hydraulic motors, such as the OMP series and OMH series motors.
In steering gear units, the Gerotor has a very direct influence. You can tell immediately whether the set is properly machined - the steering response feels either smooth and predictable, or a bit sticky and inconsistent. Many machines don't leave much room for "almost good enough," especially ones where the operator relies on steady steering feel for long hours.
Orbital hydraulic motors are another story. Some motors don't work in harsh conditions at all. For example, municipal cleaning machines or small utility sweepers use motors that rarely run at extreme pressure. In those cases, a gerotor-type motor is perfectly fine and actually quite economical.
This is the point where most suppliers struggle. It's not difficult to make a Gerotor set that "functions." It's difficult to make sets that stay consistent after heat treatment, after grinding, after lapping, after assembly - and still keep the clearances where the drawing requires them. Anyone who has tried to hold a few microns on parts over long runs knows why.
Our factory has been producing Gerotor and Geroler sets since 1999. We didn't learn this in one day. Over the years we've adjusted fixtures countless times, tried different heat-treat solutions, and rejected more parts than we would like to remember. But that's how we reached the stability we now have. We are able to meet precision levels that many customers used to think only large brands could supply.
If your company is making steering units or orbital hydraulic motors, and you need someone who can actually machine Gerotor sets with reliable tolerances - not just "good-looking samples" - you can talk to us. Send us your drawings, or samples, and we can see whether our process fits what you need.
We are used to long-term cooperation with manufacturers, not just one-time buyers, so if you want stable supply for your steering units or motors, we can support that.
FAQ
Q: When was the factory established?
A: The factory was founded in 1999. It mainly produced hydraulic motor parts like stator and rotor pairs at the beginning.
Q: What products do we mainly produce?
A: We mainly focuses on designing, developing, and manufacturing orbital hydraulic motors, steering gear and their components. We support customization.
Q: What about the quality of the products?
A: Our factory has advanced production tech, great product quality, and a good service system. Our self - developed CNC internal grinding machine has 11 patents, products can meet international standards, and we cooperates with many well - known brands like Eaton danfoss etc.