Hydraulic motors CPMV in our shop

The CPMV hydraulic motor is a distributor valve motor with a Geroler design and has the following main features:

• Low starting torque and high efficiency: Efficient power transmission even at low speeds
• Internal check valve: Allows operation without a drain line
• Tapered roller bearings: Suitable for high radial loads
• High torque: Designed for demanding applications

The CPMV series includes the following models:

• Models: CPMV 315, 400, 500, 630, 800, 1000
• Displacement: 333 cm³/rev (CPMV 315) to 990 cm³/rev (CPMV 1000)
• Performance differences: Larger models offer higher torque but lower maximum speeds and different allowable pressure drops

Available output shafts:

• Cylindrical with key: Ø 50 mm, Ø 57.15 mm
• Splined: Ø 53.975 mm (16 teeth), Ø 2⅛" (16 teeth)
• Tapered with key: 1:10, 1:8

Mounting flanges:

• Square flange (4-bolt)
• Wheel flange (W version)
• No flange option (Blank)

The integrated tapered roller bearings allow for high axial and radial forces. The permissible radial load is determined by the distance between the point of load application and the flange face. The limits given in the technical diagram must not be exceeded to avoid shaft failure. Solid lines indicate permissible loads for a service life of 3000 hours at 200 rpm.

Operation without a drain line is possible. Max. return pressure without a drain line: 75 bar (0–100 RPM, continuous duty). With drain line: 200 bar (continuous duty) and 240 bar (short-term). Advantages of a drain line: flushing, cooling, and extended seal life.

Standard rotation: clockwise when pressurized at port A. Counterclockwise when pressurized at port B. When ordering: standard rotation (Blank) or reverse rotation (“r”).

• Motor speed (n): Based on vehicle speed, wheel rolling radius, and gear ratio
• Rolling resistance (rr): Based on total weight and rolling resistance coefficient
• Grade resistance (Gr): Based on weight and slope angle
• Inertia force (Fa): For acceleration
• Drawbar pull (dP): For towing
• Total tractive effort (tE): Sum of all forces + 10% for air resistance

Torque (M) = tE × wheel rolling radius / (number of motors × gear ratio × mechanical efficiency). Wheel adhesion (MW) must be greater than the generated torque to avoid slippage. MW is calculated from the weight on the wheels, the coefficient of friction, and the same gearing parameters used for M.