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Koyo Solid Lubrication Technology

Koyo Bearings, a division of JTEKT Corporation, has been recently expanding its business of NRB’s which are submitted with solid lube.

Koyo’s solid lubrication technology for which development activities started more than 10 years ago, was originally applied to bearings for the textile machine industry mainly, but is now finding its way to other areas of application as well. Read more

Koyo solid lubrication appears to be especially successful in applications where small oscillating movements or high loads in combination with moderate speed apply. Since the rollers are encapsulated in lubrication mass; even the smallest rotations will always be made with optimum lubrication.

Our customers are increasingly focusing on “Total Cost of Ownership” (TCO) instead of looking at the bearing purchasing price only. They understand that the small additional initial investment to get their bearings filled with solid lube, more than pays back in terms of longer bearing life, less maintenance effort, repair costs and equipment downtime.

Koyo’s solid lubrication is inserted into the bearing in an injection molding machine. Therefore some investment into tooling is required for each bearing type & size. As a consequence this technology has proven to be mainly interesting for serial production applications with sufficient volumes to justify the (small) investment.

For any further information on Koyo’s solid lubrication technology and its possible applications; please do not hesitate to contact us directly via: Jaap ten Kate.

FAQ

What is an angular contact ball bearing?

An angular contact ball bearing uses axially asymmetric races. An axial load passes in a straight line through the bearing, whereas a radial load takes an oblique path that tends to want to separate the races axially. So the angle of contact on the inner race is the same as that on the outer race. Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, and dentistry equipment, the centrifugal forces generated by the balls changes the contact angle at the inner and outer race. Ceramics such as silicon nitride are now regularly used in such applications due to their low density (40% of steel). These materials significantly reduce centrifugal force and function well in high temperature environments. They also tend to wear in a similar way to bearing steel—rather than cracking or shattering like glass or porcelain.

Most bicycles use angular-contact bearings in the headsets because the forces on these bearings are in both the radial and axial direction.

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