| 摘要 |
A bearing body of substantially U-shaped cross section has right and left skirts interposing therebetween a central cavity formed in its central lower part as well as opposite recesses formed in the inner peripheral side surfaces of the skirts. The bearing body further has several axial ball rolling surfaces provided on both sides of the recesses. The ball rolling surfaces are simultaneously ground in such a manner that grinding wheels having a thickness equal to the width of the recesses are brought into contact with the recesses, respectively, with a predetermined infeed angle. Also disclosed is an unlimited sliding bearing unit incorporating therein the above-mentioned simultaneously ground type bearing body. The bearing unit further includes a guide rail, a pair of end covers, a pair of cages and balls. |
