Patent ID: 6726223
Filing Date: 2004-04-27
Classification: B23B,Y10T

Abstract:
An adjustable-length tool holder for a rotating tool, comprising a base element (7), which is provided with a coupling shank (9) for connecting to a machine tool and which, axially remote from the coupling shank (9), ends in a sleeve part (11) forming a central locating opening (13), and a plurality of tubular-cylindrical extension sleeves (15, 19; 15a, 19a, 29; 19c) which in turn each form a central locating opening (17, 21; 17a, 21a, 31; 21c) and of which a first extension sleeve (15; 15a) is arranged in an interference fit in the locating opening (13) of the sleeve part (11) in which a way that it can be positioned in an axially variable manner, and each of the further extension sleeves (19; 19a, 29; 19c) is arranged in an interference fit in the locating opening (17; 17a, 31) of the adjacent extension sleeve (15; 15a, 29) toward the base element (7) in such a way that it can be positioned in an axially variable manner, the tool being arranged with its shank (3) in an interference fit in the locating opening (21; 21a, 21c) of the extension sleeve (19; 19a; 19c) located furthest away from the base element (7) and it being possible for that region (25) of the sleeve part (11) and of each of the extension sleeves (15, 19; 15a, 19a, 29; 19c) which transmits the interference-fit forces to be widened by heating, in particular by means of an induction hearing device, for the insertion or positioning or removal of the extension sleeves (15, 19; 15a, 19a, 29; 19c) or of the tool shank (3).