| 摘要 |
A rectilinear slide ball bearing consists of a slide board, a pair of cover members, a rail-like track mount and a multiplicity of balls. The slide board assumes a substantially gate-like configuration and has a pair of load ball grooves formed in the inner surface of a recession in the longitudinal direction. The cover members include ball circulation passages for constituting ball endless tracks. The balls roll between the load ball grooves of the slide board and ball rolling grooves formed in the track mount while undergoing the load. The pair of one-sidedly provided up-and-down load ball grooves formed in each sleeve portion of the slide board are internally formed with ball rolling surfaces and constituted by deep grooves whose opening width is smaller than at least a diameter of the ball. With this arrangement, the balls do not come off from the load ball grooves of the slide board when separating the slide board from the track mount.
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