Shafts and hubs are traditionally coupled by a key and a keyway. However, this method has many problems, including the need for higher quality materials, higher precision in machining, and positioning during assembly. ETP bushings provide coupling by means of friction as a way to resolve such problems. ETP bushings are products that use friction to couple without use of keys, which solves the shortcomings and difficulties of key couplings all at once. They have two primary mechanisms, hydraulic and mechanical (wedged). Their advantages are that they are simple, compact, lightweight, easy to mount and remove, and easy to position and index accurately. This greatly reduces work from the design stage to assembly, calibration, and maintenance.
* ETP is a registered trademark of ETP Transmission AB.



Since its foundation in 1939, Miki Pulley has been leading the field of power transmission and control equipment as the pioneer of the field. We believe that we were able to be at the forefront for a long time because we have continued to challenge new things such as advanced technologies that are ahead of the times and reforming of production. And maintaining high quality is one reason we have gained the complete trust of customers. One of our goals is to become a company that places high value on the quality of all things, including the quality of products, the quality of operations, the quality of employees, and the quality of the workplace environment. We have proactively carried out various quality improvement activities.
For more information or enquiries, please do not hesitate to contact your local MIKI PULLEY distributor or visit

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