What Are Hydraulic Motors?

Hydraulic drive systems use pressurized hydraulic fluid to power hydraulic machinery. These systems are comprised of hydraulic pumps, motors and cylinders.

Hydraulic motors convert hydraulic pressure and flow into torque and rotation, providing the force and motion to move an external load.

There are four types of hydraulic motors, generally classified as high speed, low torque (HSLT) or low speed, high torque (LSHT):

  • Gear – Gears are rotated when hydraulic fluid moves into the motor; the rotary motion is produced by the motor output shaft, connected with one of the gears.
  • Vane – A rectangular vane moves in and out of the center rotor, which is connected with an output shaft. This output shaft rotates when hydraulic fluid is applied to the vane.
  • In-line or Bent-axis Piston – These motors can be either variable or fixed displacement with higher speeds and efficiencies.
  • Radial Piston – In radial piston motors, the pistons are situated perpendicular to the output shaft. As hydraulic fluid enters the motor, the pistons then force the cam to rotate.

Choosing a hydraulic motor is dependent upon the type of performance needed, for applications such as drilling rigs, military vehicle wheels, excavators, cranes, winches and more.

Let the experts at Aggressive Hydraulics guide you through the process. Contact us to learn more.