| 摘要 |
PROBLEM TO BE SOLVED: To provide a broaching tool which can maintain machined geometrical accuracy even after re-sharpening, and can improve its total tool life. SOLUTION: In the broaching tool having cutting edge groups of roughing teeth 2, semi-finishing teeth 3, and finishing teeth 4, the broaching tool has a flat drag tooth 5 arranged after the finishing teeth 4. The flank of the flat drag tooth 5 has a form relief shape and has the clearance angle not larger than 1.2 deg..
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