Seiki Seisakujyo

A professional firm dedicated to parallel shaft key manufacturing

  • Share of the Japanese market for parallel shaft key manufacturing


  • Years in parallel shaft key manufacturing


  • Dimensional tolerance

    From 1um

  • JIS-compliant items in inventory


  • Parallel shaft keys produced annually


We have acted as a specialized manufacturer of parallel shaft keys for sixty years.
We have worked with a wide range of clients from different industries.
Drawing on proven performance in manufacturing countless parallel shaft key products, we bring specialized knowledge in solving the issues you face.

We meet the diverse needs of our clients as professionals specializing in parallel shaft key manufacturing.


We will send you a free sample

We will send you a sample parallel key if you require one to assess prototypes before mass production or test it in its usage environment.

Sample request form