| 摘要 |
The invention relates to a telescopic guide (10) with a metal polygonal outer tube (12) and a ball bearing cage (18) with at least two rows of balls (16) which roll in three different corners of the outer tube (12). A metal inner tube (14) is guided by the balls (16) in the outer tube (12) and has in the peripheral regions thereof in which the balls (16) roll, a convex cross-section. The size of the balls (16) is such that when they roll in, they cause plastic deformation of the surface of the inner tube (14) and, consequently, produce guide grooves (24) in said inner tube (14). |
