| 摘要 |
A rotatable cutting bit for insertion into the bore of a bit holder wherein the cutting bit includes a bit body with opposite forward and rearward ends, a hard insert at the forward end of the bit body, and an enlarged mediate portion which has a rearwardly facing shoulder. The cutting bit further has a rearward shank which contains a reduced diameter portion. The cutting bit carries a rotatable sleeve on the shank whereby the sleeve surrounds the shank between the shoulder and the reduced diameter portion. The cutting bit also carries a rotatable washer on the shank adjacent the shoulder of the bit body. A keeper ring is captive within the reduced diameter portion of the shank. |
