Improvements in or relating to chucks for machine tools
729,051. Chucks. CLEA VER, A. Oct. 29, 1953 [July 31, 1952], No. 19337/52 Class 83 (3). A chuck comprises a tapered collet 5 closed by a screw cap 8 to grip a parallel shank tool 9, and a tapered pin 14 which passes througt the chuck body 4 and the collet to engage a recess 13 in the tool-shank.