4 Hydraulic Motor Types You Need to Know


Hydraulic motors are commonly used in many industries to power machines and equipment. Hydraulic motors frequently maximise the rotational kinetic energy generated by pressurised hydraulic fluid. This energy is then transferred to mechanical components of the aforementioned things.

There are several reasons why hydraulic motors can help industries. For example, despite using less energy, hydraulic motors can easily ensure that a significant amount of power is transferred. They are also capable of accurately dispensing rotational kinetic energy to mechanical machines and equipment pieces. Finally, they are less difficult to maintain than other types of motors.


Hydraulic motors are currently classified into several types based on their configuration. The following are some of the most common types of hydraulic motors:

A hydraulic intensifier is a device that uses hydraulic energy from a large quantity of water or hydraulic fluid at low pressure to increase the intensity of pressure of any hydraulic fluid or water.

  • Gear Motors

Gear motors have inlet and outlet ports that are similarly sized and symmetrical, allowing them to adapt to negative and positive rotation. They also have rolling bearings that are designed to reduce friction torque during startup. Gear motors are great because they are lightweight and simple to maintain. They also have a small form factor, are impact resistant, and have a high oil suction capacity. Gear motors, on the other hand, have high pressure and torque ripple, low volumetric efficiency and input pressure, low starting torque, poor low-speed stability, and high noise.

  1. Vane Motors

Vane motors, on the other hand, can be effective in applications that require high speed, low torque, and sensitive motion due to the features they incorporate. Vane motors, like gear motors, have a compact form factor that makes them suitable for any application. Vane motors have a low moment of inertia, good flexibility, and a high input speed. They can even remain stable despite working for extended periods of time. Vane motors, on the other hand, have some disadvantages. For starters, they do not have excellent anti-pollution capabilities. They also do not work consistently at low speeds.

  1. Radial Plunger Motors

Radial plunger motions are low-speed, high-torque hydraulic motors that can be classified as single-acting or multi-acting. Housing, flow distribution valve, connecting rod, plunger, eccentric wheel, crankshaft, and other parts help single-acting hydraulic motors provide dependable performance. However, they are large and heavy. They also have poor low-speed stability. Multi-acting hydraulic motors, on the other hand, have multiple plungers installed to help double their displacement, provide high output torque, and reduce torque ripple rate.

  1. Axial Plunger Motors

Axial plunger motors work by keeping the oil distribution and swash plates in place while allowing the motor shaft to rotate with the cylinder. When pressure oil enters its hole through the oil distribution plate’s window, the plunger extends. When the pressure oil’s input direction changes, the motor shaft will turn positive. The motors’ torque, speed, and rotary direction will all be affected by changes in swashplate dip angle. When optimizing axial plunger motors, keep in mind that the greater the dip angle, the greater the torque produced.

You can contact Mobile Hydraulic Specialties to learn more about these hydraulic motors.

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