ARAHIDRA is the only unique brand of hydraulic couplers manufactured in Spain, and we, Diseños y Montajes Mecánicos S.L., are the ones who manufacture them.

With over 50 years of experience, our couplers are extremely versatile for all types of transmissions and machinery, with superior quality.

How does an Arahidra hydraulic coupler work?

A hydraulic coupler is a power transmission system that utilizes oil to transfer energy between two rotating shafts. It operates by the speed difference between the input and output shafts, generating a flow of fluid that transmits torque. This allows for smooth connection and disconnection of mechanical components without the need for direct contact between them.

This achieves a progressive start on the secondary shaft by overcoming any inertia it may have. Furthermore, by separating the two mechanical components, it prevents a lock or overload on the secondary shaft of the transmission from being directly transmitted to the driving machine (primary shaft). Finally, our couplers allow for the variation of power transmission from the main shaft to the secondary one through the control of oil used in the coupler. Thanks to this adaptability, we can control the output speed of the shaft.

Applications of Arahidra couplers

Our Arahidra couplers have multiple applications, among which we can highlight:

  • Mixers and agitators.
  • Bucket elevators.
  • Pumps and fans.
  • Crushers, mills.
  • Conveyor belts.
  • Trommels.
  • Cranes.
  • Etc…

Our Arahidra catalogs





For more information about Arahidra, please visit our website: