CPMH Hydraulic Motors

Hydraulic Motors by Hydromot are characterised by their high quality and reasonable price. Our CPMH hydraulic motors are compatible with the hydraulic motors of e.g. Danfoss, Eaton, White, Bosch-Rexroth etc. For further information please visit our guide.

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CPMH Hydraulic Motor FAQ


What is the maximum speed of the CPMH 200 hydraulic motor?

The maximum speed of the CPMH 200 hydraulic motor depends on operating conditions:

  • Continuous operation: 366 rpm
  • Intermittent operation (6 seconds per minute): 439 rpm


What type of mounting does the CPMH hydraulic motor use?

The CPMH hydraulic motor offers two mounting options:

  • 4-hole Magneto flange: This is the standard mounting type.
  • 2-hole Oval flange


What output shaft options are available?

CPMH hydraulic motors offer a variety of output shaft options, including:

  • Cylindrical shafts: Available in diameters of 32 mm, 35 mm, and 31.75 mm (1 1/4"). These shafts typically feature a key.
  • Splined shafts: Available in configurations SAE 6B and 14-tooth, DP 12/24 with a diameter of 31.75 mm (1 1/4").
  • Tapered shafts: A tapered shaft with a 1:10 taper and a key.

The choice of shaft depends on the specific application and torque requirements.


How do I determine the required torque for my application?

To calculate the required motor torque, you should consider the following factors:

  • Rolling resistance: Resistance from wheels contacting various surfaces.
  • Grade resistance: Resistance encountered when climbing slopes.
  • Acceleration force: Force required to accelerate from 0 to maximum speed.
  • Drawbar pull: Additional force required for pulling, e.g., a trailer.

The total tractive effort (TE), which represents the total force needed for vehicle movement, is calculated as: TE = 1.1 x (rr + Gr + Fa + dP).

The motor torque (M) is then calculated as: M = (TE x rm) / (N x i x ηm), where:

  • rm = Rolling radius of the wheel
  • N = Number of motors
  • i = Gear ratio between the motor and wheels
  • ηm = Mechanical transmission efficiency


How do I choose the right CPMH motor for my vehicle?

Selecting the right CPMH motor involves calculating the forces acting on the vehicle, including rolling resistance, grade resistance, acceleration force, and drawbar pull. You should also consider the desired speed and the weight supported by the wheels. By comparing these calculations with the performance data provided for each CPMH motor model, you can select the motor that meets your specific application requirements.


What is the maximum allowable return pressure for the CPMH motor?

The maximum return pressure depends on whether a drain line is used:

  • Without a drain line:
    • Continuous operation: 175 bar
    • Intermittent operation: 200 bar
    • Peak: 225 bar
  • With a drain line: Contact us for specific values.


What are the advantages of using a drain line with the CPMH motor?

Using a drain line for the CPMH motor offers several advantages:

  • Cleaning: The drain line removes contaminants from inside the motor.
  • Cooling: The drain line helps dissipate heat, keeping the motor operating at optimal temperatures.
  • Extended seal life: By removing contaminants and heat, the drain line helps extend the life of the motor seals.


Can the CPMH motor be connected in series or parallel?

The CPMH hydraulic motor can be connected either in series or parallel, depending on the application requirements. Series connections provide higher torque output, while parallel connections offer greater speed options.