| 摘要 |
1,070,102. Countersinking tool. E. SCHMID. Aug. 4 1964 [Aug. 6, 1963], No' 31279/64. Heading B3C. A countersinking tool comprises a shaft 1, Fig. 1, a guiding pin 3 slidable in a bore 2 and a cutter 10 screwed to the shaft. Pin 3 has a recess 7 for guiding a lip 11 of the cutter, and the pin is urged against a shoulder on the cutter by a spring 6. In a modification, three lips 11, each having a cutting edge, are provided. |
