| 摘要 |
PROBLEM TO BE SOLVED: To improve rounding precision and thinning precision on a bearing ring of a roller bearing. SOLUTION: This roller bearing is constituted of a first main shaft 11 to hold a pipe type material W after heat treatment furnished with a collar part 1 on one end and formed cylindrical, a working device 23 to form the pipe type material held with the first main shaft into a desired shape ring member 10 through one or both of machining work and grinding work and a second main shaft 28 to hold the pipe type member between itself and the first main shaft and to hold a ring member cut by the working device, and the cutting side of the ring member held by the second main shaft is applied with one or both of the machining work and the grinding work by using the working device and the first main shaft is furnished with a clamp jig 14 to clamp the collar part 1 of the material W and a chuck 12 to fix the clamping jig 14. COPYRIGHT: (C)2004,JPO |
