SPANNZANGENFUTTER.

摘要

A collet chuck, comprising the main body (11) of the chuck, a collet (12) which is fitted into the main body thereof, and a fastening nut (13) for chucking a cutting tool which is screwed into the main body of the chuck under the state where the fastening nut is detachably connected to the collet, thereby reducing the diameter of the collet, wherein an external flange (16) is provided on the collet (12), internal flanges (18a,b) are provided on the fastening nut (13), and while holding of these flanges (16, 18a,b) into one another permits the collet (12) and the fastening nut (13) to be detachably connected to each other, a pair of cutout sections (19) opposite to each other are formed on the inward flanges (18a,b) of the fastening nut (13) so that the mounting and detaching operation may be easily made.