| 摘要 |
1,233,953. Cutters. DIAGRIT GRINDING CO. Ltd. 8 Oct., 1968, No. 47565/68. Headings B3C and B3K. A parallel or tapered reamer, boring tool, drill bit, or end mill, comprises a body 10, and a cutter bit 14 secured to the body by a screw 16, and drivingly located so that its lands are aligned with the lands on the body by a washer 22 having projections 23 which co-operate with slots in the bit and body. The bit may be formed from tungsten carbide, or high speed steel. |
