Internal Gear Units QXM
Pump-motor units

Internal Gear Units QXM

Pressure [bar]


Displacement [cm3/obr]


Pump/motor operation in multi-quadrant applications
The QXM series is an extension of the QX pump series and is suitable for operation as both a pump and a motor. Thanks to the completely symmetrical design, these units can be used in multi-quadrant operation and are suitable for a wide range of applications in both industrial and mobile hydraulics. In 4-quadrant operation, the movement of cylinders can be controlled on the one hand, and exploited to recover/save energy on the other. For example, if the unit works as a pump during a lifting process, it can then work as a motor during the lowering process to feed energy back into the system.

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  • Open/closed circuits up to 400 bar max. working pressure
  • Low noise level < 75 dB(A)
  • Particularly suitable for multi-quadrant operation
  • Can be used with all hydraulic fluids
  • Can be used with fixed- and variable-speed drives


  • Injection molding machines
  • Hydraulic presses
  • Flight simulators
  • Fan drives
  • Wind turbines
  • Elevator/lift drives
  • Winch drives
  • Marine industry

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