TAP WRENCH FOR THREADING ROUND DIES Russian patent published in 1994 - IPC

FIELD: mechanical engineering; thread cutting. SUBSTANCE: installed in body 1 is detachable V-shaped insert 4 whose vertex is arranged along longitudinal axis of body 1 at side opposite to threaded handle 2. Outer side surfaces 6 and 7 of insert 4 in cross section correspond to inner surfaces of walls of body 1. Inner side surfaces 9 and 8 of insert 4 are made equidistant to outer side surfaces 6 and 7 of insert 4. The latter is held in body 1 by lock. Die 10 is installed in socket of insert 4 by aligning slot on die outer surface with axis of end piece 3 of handle 2 and is pressed to walls of insert 4. If a larger size die is to be fixed, insert 4 should be taken out of body 1. EFFECT: enlarged operating capabilities. 2 dwg