| 摘要 |
PROBLEM TO BE SOLVED: To provide a collet type tool holder of a press-in method capable of dealing with a significantly large cutting torque without using taper fitting. SOLUTION: The collet type tool holder is provided with a chuck body 10 having an attaching part to a machine tool main shaft and a machine tool holding part 13 provided with a collet insertion hole 13b and a collet 20 having a cylindrical shaft part 22 attached to an inner diameter part of the collet insertion hole 13b and a surface chipping part 22a, provided at an outer diameter part of the shaft part 22, for elastically deforming the shaft part 22 in a radial direction. In the collet insertion hole 13b, the chuck body 10 has an inner diameter part provided with a fastening margin X for elastically deforming the shaft part 22 of the collet in the radial direction. The shaft part 22 of the collet 20 is elastically deformed inward in the radial direction by the fastening margin X and held at the inner diameter part of the collet insertion hole 13b by rotating the chuck body 10 or the collet 20 in a circumference direction while the shaft part 22 of the collet 20 is inserted in the tool holding part 13. COPYRIGHT: (C)2009,JPO&INPIT
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