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Rotary actuator SM4

The reference among the rotary actuators.

The SM4 is a rotary actuator with an operating pressure up to 250 bar, which works according to the 'helical gear' principle.  How often have you searched for a rotary unit capable of executing a rotary movement or a limited rotational movement in an extremely small installation space? Frequently? If so, then Eckart can offer the perfect solution with its current 250-bar rotary actuator, the small and compact SM4.


  • operating pressure up to 250 bar,
  • compact und robust,
  • wear resistant,
  • efficient end cushioning,
  • adjustable drive shaft datum,
  • angle adjustment ± 5°.
For more information, please feel free to contact us at

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Eckart website

Visit the Eckart website for:

  • More information about Eckart,
  • Detailed specifications of the SM4,
  • Additional functions,
  • Special designs,
  • Product applications,
  • Downloads.