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Hydraulic motors, CPMM oil motors
The CPMM hydraulic motor is a compact and versatile motor featuring a spool valve and a Gerotor set, making it ideal for applications with limited installation space. With its integrated check valve and the ability to operate without a case drain line, it offers maximum flexibility in installation and operation. Learn more...
Buy CPMM oil motors at Hydraulics Shop
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These Gerotor motors are interchangeable with the OMM hydraulic motor from Sauer/Danfoss, the Eaton J-Series, the MM from M+S Hydraulic, the WM series from White, and the BGM from SAM Hydraulics.
CPMM Hydraulic Motor – Frequently Asked Questions
What is a CPMM hydraulic motor?
The CPMM is a hydraulic oil motor featuring a spool valve with a Gerotor set. This design makes it ideal for use in applications where space is limited. It includes an internal check valve and can be operated without a case drain line.
What mounting and connection options are available for the CPMM?
The CPMM Gerotor motor is available with various mounting and connection options to meet the requirements of different applications.
Mounting options:
- Round flange (3‑bolt): For standard flange mounting
- Oval flange (2‑hole): For applications requiring an oval flange
Connection options:
- Rear ports: Ports located at the back of the motor
- Side ports: Ports located on the side of the motor
How do I determine the correct CPMM motor size for my application?
The appropriate CPMM motor size is determined by the required displacement, speed, torque, and pressure drop. You can find the specific values for each CPMM model in the “Technical Data” table and select the model that matches your requirements.
Can the CPMM hydraulic motor operate intermittently?
Yes, the CPMM motor can be operated intermittently. The “Technical Data” table contains the maximum speed and torque values for continuous and intermittent operation. Intermittent operation is defined as 6 seconds of operation per minute.
What is the maximum peak load that the CPMM motor can handle?
The maximum peak load is the highest load the motor can withstand for a very short duration (0.6 seconds per minute). The “Technical Data” table provides values for peak torque and pressure drop for each CPMM model.
What types of output shafts are available for the CPMM motor?
The CPMM motor offers several output shaft options:
- Ø16 mm straight with 5×5×16 keyway: Standard straight shaft with keyway for secure component mounting
- Ø15.8 mm (5/8") straight with 3/16" x 3/16" x 3/4" keyway: Straight shaft with imperial dimensions and keyway
- Ø16.5 mm splined B17 × 14: Splined shaft for high-torque applications
How do I determine the permitted radial shaft load for the CPMM motor?
The allowable radial shaft load depends on the distance (L) between the load application point and the mounting surface. Refer to the “Radial Shaft Load” graph in the technical datasheet. It shows the permitted load at different speeds when L = 20 mm. You can calculate the allowable load for other L values using the provided formula.
What is the maximum back pressure for the CPMM motor?
The maximum permissible back pressure without a drain line depends on the motor's speed. The datasheet includes a table showing the maximum back pressure for different speed ranges. It is important to stay within these limits to avoid damage to the motor.