Patent ID: 6352395
Filing Date: 2002-03-05
Classification: B23B,Y10T

Abstract:
A tool holder to be removably fitted into a taper hole which is formed in a spindle of a machine tool such that diameter decreases rearward comprising:a holder body having a shank portion and a flange portion formed at a front side of the shank portion; a taper cone fitted to the shank portion and tapered such that diameter decreases rearward; an elastic member interposed between a rear-end portion of the flange portion and a front-end portion of the taper cone fitted to the shank portion; and a stopper member disposed on the shank portion and adapted to support a rear-end face of the taper cone fitted to the shank portion, wherein an outer circumferential surface of the taper cone is tapered at an angle equal to that at which a wall surface of the taper hole is tapered; and an inner circumferential surface of the taper cone and an outer circumferential surface of the shank portion are tapered at least partially with respect to an axial direction such that diameter decreases rearward, at equal angles smaller than the angle at which the outer circumferential surface of the taper cone is tapered.