| 摘要 |
PURPOSE:To promote the reduction of resistance of a bearing and wearing of a surface for a rolling ball to roll running, by forming a high performance resin material into a small thickness cylindrical shape by injection molding and simultaneously molding holes, for separating the rolling balls, and protrusive parts for preventing the rolling ball from falling off from a holder. CONSTITUTION:Balls 2 in a holder 1, built in a bearing, are driven running in a speed half the relatively moving speed of the bearing 3 while holding simultaneously contact with the bearing 3 and a rolling surface, and balls 2 in a circulating route are also simultaneously driven running in the route in the same speed to the holder 1. The holder 1, using a high performance resin material having flexibility, strength, wearing resistance, etc., is formed by injection molding into a small thickness corresponding to a value about 1/10 times the diameter of the rolling ball, and the holder 1, which provides ring-shaped protrusive parts in the internal peripheral and peripheral surfaces and holes for the rolling ball 2 forming the internal peripheral surface of the hole in the minimum diameter smaller than the diameter of the ball 2, prevents the ball 2, when it is driven running, from falling off.
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