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Unidirectional bearing resistant to magnetic fields

OneWay Mx

The OneWay system is a radial ball clutch product. Coupling is by friction shoe binding. The OneWay unidirectional bearing is generally used in the automatic winding system and serves as the reverser.

In order to retain the proven advantages of the OneWay watch bearing, MPS has developed and patented OneWay Mx. How? By using new antimagnetic materials that strongly reduce the bearing's sensibility to magnetic fields.

Patent number: EP1134626A1



  • Miniaturised free wheel system
  • Anti-magnetic / amagnetic
  • Occupies very little space
  • Minimum dead angle
  • Withstands high loads
  • Limited play
  • Lubrication-free system

Anti-magnetic miniature bearing


  • Product sheet – OneWay
  • SSC Publication - OneWay
  • Product sheet – OneWay Mx

Unidirectional, anti-magnetic bearing OneWay Mx
Unidirectional, anti-magnetic bearing OneWay Mx
Unidirectional bearing OneWay Mx
Unidirectional bearing OneWay Mx

Everything to develop your miniaturised unidirectional bearing

Do you want to develop your solution adapted to the special features of your construction based on the OneWay bearing? To follow our design process, you can go to the next step and view the references for our miniaturised unidirectional bearings. 

A team listening to your concerns

Our customers’ quest to improve the performance of traditional reversers used in watchmaking has driven our engineers to innovate and develop the OneWay unidirectional bearing.

Its use is now widespread and its reliability has been proven over more than ten years.

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