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Electric motors for hydraulics. The power of Kolmer

In installations with complex movements that also have to be carried out in a controlled manner, electric motors for hydraulics can offer the solution. We can come up with a solution for every conceivable movement.

An electric motor rotates and it is not always easy to change that into a linear movement. You could, of course, use a spindle, but a cylinder is a more common way of linear movement. The cylinder is filled with oil under great pressure. This pressure causes the piston rod of the cylinder to be pushed outwards. If the piston rod has to return inside, the oil is fed into the other side. This creates a linear movement that can go either way.

Extensive experience with electric motors for hydraulic applications

Kolmer Electric Motors has extensive experience when it comes to electric motors for hydraulics. For example, we have already installed a hydraulic unit by ASI in Soest as well as Rijkers Hydrauliek units for marine applications.

We also supplied the motor for the (then) largest gripper in the world. For this purpose, the electric motor was built into the oil tank to ensure that the gripper jaws could be closed and opened. Kolmer supplied the motor which was placed in the oil tank. The motor had a power of 37kW and was used in the Far East to salvage a sunken car carrier ship. The ship had sunk close to the harbour entrance and was removed in parts from the bottom of the sea using an enormous gripper. The size of the gripper was such that many cars could be salvaged at the same time. The gripper successfully accomplished its task thanks to Kolmer’s powerful electric motor.

The advantages of electric motors for hydraulics

Cylinders for linear motion are widely used on garbage trucks, on board ships, on packaging machines, etc. The applications are endless. The oil pressure of installations that have to make complex movements is controlled by an electric motor. The motor raises the pressure of the oil to the desired working pressure. This allows the installation to continue its work. Thanks to a number of valves the desired movements can be realised.

The system’s operating pressure determines the power that is ultimately to be installed. Taking into account some losses, suitable electric motors are then selected for the hydraulics. The motors are often mounted directly on the tank of the hydraulic unit. This keeps the installation compact. Kolmer Electric Motors would love to share some thoughts and ideas with you regarding the right electric motor.

If there is only limited space available, we can supply specially designed electric motors for hydraulics. A motor that you could place inside a tank with oil. In this case, the entire motor will do its work submerged in oil, saving you a lot of space.

More information or a bit of Q&A regarding your hydraulics query?

Are you curious about all that we can do for your application? Our specialists are happy to talk to you and explain a bit more about the many options Kolmer Electric Motors has to offer. Please feel free to contact us for more information without any obligation. During an introductory meeting we will gladly tell you more about our range, our customised/custom-made solutions and transparent working method.

Applications in the industry:

Hydraulics - Infrastructure & Construction


Brand loyalty is our middle name. Ever since our company was established we are well disposed towards Cantoni Motor and Cemp. Our current range consists of a large variety of electric motors and related products from these worldwide operating brands.

IE1 motors

Series Sg, Sh, SIE | Three-phase squirrel-cage induction motors, suitable for general purpose

IE2 motors

Series 2SIE | Three-phase squirrel-cage induction motors, suitable for general purpose

IE3 motors

Series 3SIE | Three-phase squirrel-cage induction motors, suitable for general purpose

IE4 motors

Series 4SIE | Three-phase squirrel-cage induction motors, suitable for general purpose

Kolmer Top Coating

An engine that does not flake and does not rust, that is our goal when we start an extensive research project in 2016. We develop a coating that does hold and the test results exceed all expectations. Engines keep looking great year after year, no matter the conditions. TNO is testing the safety and we are now fully in production. Kolmer Top Coating anchors itself through the paint layer in the underlying aluminum and cast iron. A water-thin, super strong layer that protects for years and can be used on all our Cantoni and a selection of EMF and Cemp engines.

Read more about topcoating
That's why Kolmer Electric Motors:
  • Customized solutions
  • Sustainable electric motors
  • Effective solutions
  • High quality motors
  • Over 35 years of experience

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Jan Bakker , Salesmanager
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Marcel van Kekem, Sales Engineer
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Chris Huygens, Sales Engineer
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"If customization is required, Kolmer Electric Motors will also do everything in their power to seamlessly meet our demand. Customization is all about details and they are good at that!"

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