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Essential Guide to Geroler Hydraulic Motors

Choosing the right hydraulic motor is vital for keeping your machinery running smoothly and efficiently. Whether you are working in agriculture, construction, or food processing, understanding motor design ensures you get the best performance for your application.

Geroler hydraulic motors are an upgraded evolution of the Gerotor design. The key difference is the addition of hardened steel rollers between the gear teeth. These rollers allow internal components to roll against each other rather than slide, dramatically reducing friction and wear. The result is a motor that runs cooler, lasts longer, and delivers more precise low-speed torque than a standard Gerotor.

1. How Geroler Motors Work

Like the Gerotor, the Geroler uses an inner rotor and outer ring gear arrangement where the inner gear has one fewer tooth than the outer ring. As hydraulic fluid flows through the motor, expanding and contracting pockets convert fluid pressure into rotation. The critical improvement is the hardened rollers seated between the gear teeth — these eliminate the metal-on-metal sliding contact of the Gerotor design, creating a tighter seal and significantly higher mechanical efficiency.

2. Key Features and Series

Our range includes the HR, HW, MH, MLHH, MLHR, MR, RL, and RW series. These motors are the most widely used orbital motors in the Australian market, covering the broadest range of agricultural, construction, and industrial applications. They are direct replacements for Danfoss OMR, Eaton Char-Lynn S Series, Parker TC Series, and White WR/WD Series motors.

• Less Friction: Hardened rollers replace sliding contact, reducing heat and energy loss during operation.
• Low-Speed Precision: These motors maintain steady, consistent torque even at very low RPM — critical for applications requiring controlled movement.
• Longer Service Life: Reduced internal wear means these motors outlast standard Gerotor designs in continuous-duty applications.

3. Common Applications

Geroler motors are the sweet spot between cost and performance — more capable than a Gerotor, more affordable than a Disc Valve motor. You will commonly find them powering:

• Skid Steer Attachments: Augers, mulchers, brush cutters, and trenchers requiring reliable continuous-duty torque.
• Agricultural Equipment: Spray pump drives, header drives, and bale wrap systems on harvesters and balers.
• Food and Beverage Processing: Car wash brush drives, conveyor drives, and bottling line equipment where smooth low-speed operation is critical.
• Wheel Drive Applications: The HW and RW series are specifically engineered for direct wheel drive on turf equipment, zero-turn mowers, and compact transport vehicles.

Quick Comparison Table

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email: sales@mhfgc.com.au
Phone 07 5563 1982 or 1300 146 737