European Locations

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Company name Koyo Italia SRL
Country: Italy
Address: Via G. Stephenson 43/a, Milano
Phone: +39 (0)22 951 0844
Type: Sales
Company name Koyo Kullager Scandinavia A.B.
Country: Sweden
Address: Kanalvägen 5A, Upplands-Väsby
Phone: +46 (0)8 59421210
Type: Sales
Company name JTEKT Europe Bearings B.V. Poland Branch Office
Country: Poland
Address: 3, Maja 14
Phone: +48 (0)32 746 7777
Type: Office
Company name Koyo Italia SRL – Romania Representative Office
Country: Romania
Address: Str. Dr. Lister nr. 24, apt. 1, sector 5, Bucuresti
Phone: +40 (0)21 410 4182 /410 4170
Type: Sales
Company name Koyo (UK) Ltd
Country: United Kingdom
Address: Whitehall Avenue, Kingston, Milton Keynes
Phone: +44 (0)19 082 89311
Type: Sales
Bearing 3D

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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