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FYH is the oldest and largest manufacturer of mounted ball bearing units in Japan. They began production of industrial mounted units for the Japanese market in 1950, and since then, have established themselves as a leading manufacturer of mounted units worldwide.

Decades of experience have led to the development of myriad advancements including automated production for individual self-aligning structure bearings which has allowed FYH to control and fabricate high quality metallic and ceramic bearings while adhering to extremely strict guidelines and tolerances. These manufacturing techniques, in conjunction with the utilization of high quality materials, are what truly set FYH apart from the competition.

FYH continually conducts extensive research and development activities in an effort to fabricate mounted bearing units which can operate without maintenance even under the most demanding situations in applications such as the ocean and space technology sectors. Their ongoing research is specifically focused on the improvement of the Ceraball series under this all-encompassing ideology.

Technology and Engineering

FYH bearings are designed with severe operating conditions in mind where high-speed rotation and heavy loads are regularly encountered. Nearly 700 kinds of bearings and 300 types of housings are available in their product line. Therefore, several thousand different combinations of mounted units and inserts are annually produced and supplied to the world market to meet a vast range of applications and industries.


FYH abides by stringent Japanese Industrial Standards (JIS) for selection of materials and production methods and, in contrast to today’s commercially available bearings, their products’ surface finishing state is beyond that of JIS bearing specifications

Competitive Edge

The capability to manufacture both bearing inserts and housings from start to finish under the same roof has allowed FYH to pioneer many technological advancements in mounted bearing design. Through a proprietary housing bore machining process, FYH is able to maintain a “J” tolerance fit between the bearing insert and the housing which produces a perfect fit between both components. This critical design element ensures that the shape of the housing bore is more cylindrical and spherical than competitive designs. This important feature prevents the bearing from being too loose within the housing or from being squeezed both radially and axially, and it specifically translates to longer bearing life through reduced wear and vibration. The special J-fit feature allows every bearing to be 100% interchangeable with virtually any housing.

Product Range

FYH has nearly 700 kinds of bearings and 300 types of housings are available in their product line.

New Spherical Roller Units

  • A new patent pending triple-lip sealing design that has a +_ 2 degree self-aligning capability and that protects the bearing against wet and dry contaminants. It drastically improves bearing life.
  • The one piece ductile iron housing is twice as strong as cast iron and the semi-solid base design ensures that vibration and shock load are no match for the rugged Extra Tough series.
  • The FYH Roller Grease temperature range is -40 to 340° F (-40 to 170°C) and provides excellent extreme pressure and anti-wear protection.
  • The unit can easily be converted from non-expansion to expansion.

Ceramic Ball Units

The Ceraball series exhibits extremely high anti-abrasion qualities and offers remarkably stable performance in the most severe environments.

  • Reduced maintenance costs as re-lubrication intervals can be eliminated altogether.
  • High stress resistance and low friction operation.
  • Temperature up to 450° C

Clean Series

  • Inner ring and set screw with anti-corrosive plating
  • Waterproof rubber coated cover
  • Lightweight and compact design by anti-corrosive housing
  • Superior sealing effect with pre-lubricated bearings.
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