What is the difference between Geroler and Gerotor?

 

In the orbital hydraulic motor industry, there are two terms: Geroler and Gerotor. What is the difference between these two terms? Do they refer to the same product?

 

As we all know, an orbital hydraulic motor converts hydraulic energy into mechanical energy through the interaction between the stator and rotor. Both terms refer to orbital hydraulic motors, but there are structural differences between them. These differences are mainly found in their core components-the stator and rotor.

 

The two pictures below show the core components of orbital hydraulic motors, also called the stator and rotor. Can you spot the difference between the two sets?

 

After comparing the two images, you'll notice that although both sets are based on the cycloidal principle, the mechanism in the second picture is more complex-it includes roller needles.

 

The first image shows what is commonly referred to as a Gerotor motor, while the second image shows the structure used in a Geroler motor. The addition of roller needles, which act as bearings, helps reduce friction between the stator and rotor, thereby improving mechanical efficiency. As a result, Geroler motors typically offer smoother performance at low speeds. Clearly, Geroler motors have better performance characteristics than Gerotor motors, although their structure also makes them more expensive.

 

Therefore, when purchasing an orbital hydraulic motor, it is important to understand the motor's internal structure, especially its core components-the stator and rotor. Their materials, machining precision, and design will directly affect the motor's efficiency and service life. So when you receive a quotation, be sure to ask the supplier about the material and structure of the motor's stator and rotor to make an informed decision.