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Koyo Seiko (Osaka, Japan) was established as a private company by Zenichiro Ikeda in 1921. They initially sold imported bearings but by 1935 had begun production of Koyo branded bearings under the name Koyo Seiko Co., Ltd. [ 1 ] [ 2 ]
In the case of ball bearings, the bearing has inner and outer races and a set of balls. Each race is a ring with a groove where the balls rest. The groove is usually shaped so the ball is a slightly loose fit in the groove. Thus, in principle, the ball contacts each race at a single point.
JTEKT Corporation TYO: 6473.T is a Japanese corporation created in January 2006 upon the merger of two companies: Koyo Seiko Co. and Toyoda Machine Works.. Toyoda Machine Works, Machine tool sales for North, Central and South America, aftermarket support services, machine re-manufacturing and engineering services supplied by Jtekt Toyoda Americas Corporation H.Q. Arlington Heights, Illinois ...
Roller bearings may use just two races, but ball bearings typically use three or four races. Wire race bearings can be large yet lightweight and with small profile and good precision. Wire races have little intrinsic structure and must be adequately supported by the bearing housing. Balls, rollers or even cross rollers are used as rolling elements.
A sealed deep groove ball bearing. In mechanical engineering, a rolling-element bearing, also known as a rolling bearing, [1] is a bearing which carries a load by placing rolling elements (such as balls, cylinders, or cones) between two concentric, grooved rings called races.
Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races. Common ball bearing designs include angular contact, axial, deep-groove, and preloaded pairs.
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