- Max. flow
- 30 L/min
- Max. pressure
- 0.6 MPa
Illustration · product photos to follow
Cooling & Lubrication Pumps · GR series
GR Series Gerotor Pump
Compact internal gerotor pump, shaft or motor driven, supplying steady cooling and lubricating oil to transmissions, reducers and hydraulic units.
- Compact
- Low noise
- Shaft / motor drive
- Displacement
- 5–40 mL/rev
- Speed
- 500–4000 rpm
- Max. pressure
- 3 MPa
- Viscosity
- 5–1000 cSt
* Sample data on this page; the official catalogue prevails.
Overview
A gerotor pump has an eccentric inner rotor and an outer rotor with one more tooth. As both turn in the same direction, the chambers between the teeth grow and shrink, drawing in and discharging oil.
The GR series can be mounted on a gearbox or reducer as a shaft-driven lubrication pump, or paired with a motor as an independent cooling and lubrication unit for hydraulic power units and machine tools.
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Compact and efficient
Net-shape inner and outer rotors, few parts, small size and high volumetric efficiency for the displacement.
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Low pulsation and noise
Continuous multi-tooth engagement gives smooth flow — suited to drivetrains with NVH targets.
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Wide operating window
Self-priming and steady delivery over wide speed and viscosity ranges.
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Flexible drive
Driven directly from a gearbox shaft, or combined with a motor as a stand-alone oil pump unit.
Specifications
| Pump type | Internal gerotor pump |
|---|---|
| Displacement | 5–40 mL/rev |
| Speed range | 500–4000 rpm |
| Continuous pressure | ≤ 2.5 MPa |
| Max. pressure (intermittent) | 3 MPa |
| Fluids | Gear oil, hydraulic oil, ATF, lubricating oil |
| Viscosity range | 5–1000 cSt |
| Oil temperature | -30 to +120 °C |
| Housing | Aluminium alloy / cast iron |
| Rotors | Sintered powder-metal steel |
| Rotation | Unidirectional (bidirectional optional) |
Models
Performance curves
- GR-05
- GR-12
- GR-25
- GR-40
Dimensions & interfaces
Dimension drawing to follow (updated once CAD is available)
| Oil ports | Threaded G3/8 – G1, or flange |
|---|---|
| Mounting | SAE / square flange, or integrated in gearbox housing |
| Shaft | Keyed / splined / flatted |
| Weight | 0.9–6.5 kg (by model) |
Applications
- Compressors & Industrial Gearboxes Lube oil systems for turbo-compressors, steam turbine gear units and high-speed reducers.
- Machine Tools & Equipment Spindle cooling, cutting fluid circulation and hydraulic unit cooling for stable accuracy.
- Electric Vehicles Battery pack cooling and oil-cooled e-drives — electric water and oil pumps.
Downloads
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