| 摘要 |
<p>PURPOSE:To provide a track ball roller where contact between the surfaces of track balls and roller contact parts is not affected by the change of a friction coefficient owing to dirt. CONSTITUTION:The track ball roller where grooves 22 which are continuous for the whole periphery are formed on the surfaces of the rollers 20 which are brought into contact with the surface of the track ball 10, and the surfaces of the rollers 20 are constituted by the contact parts 21 which are directly brought into contact with the surface of the track ball 10 and by the grooves 22 is provided.</p> |
