| 摘要 |
PCT No. PCT/SE95/01386 Sec. 371 Date Aug. 11, 1997 Sec. 102(e) Date Aug. 11, 1997 PCT Filed Nov. 21, 1995 PCT Pub. No. WO96/15874 PCT Pub. Date May 30, 1996A grinding cup includes a wear part having a cavity at its front end, the cavity configured for grinding a button of a rock drill bit. A flush channel extends forwardly through the wear part and terminates at the cavity for conducting a flushing medium thereto. The flush channel is spaced from a center axis of rotation of the grinding cup by a distance greater than 2% and less than 30% of a largest diameter of the cavity. |
