Tool-changing device for a machine tool

摘要: The tool-changing device has a changing head (7). By means of this, tool holders (4) with cylindrical parts (5) different diameters can be inserted into holder receiver (1). (7) has, at the end thereof which faces towards concerned any moment, substantially segmental part (7a) and first centering recess provided in latter, is formed by part-cylindrical surface (8) having radius corresponding approximately to (R1) (4). Portions second (9) are on two opposite sides respectively (7b) widened out an axial direction respect said part, this being concentric its relatively long that holder. latter near radial screw-threaded bore for (7a). In center there connecting bolt extends movement (7), capable motor driven either directions rotation will external screw-thread (10b) engagement (6).