Mandrel for mounting of drill uses converging jaws in bores going through the mandrel body controlled by a nut and an annular cavity located at its front end to hold the dust particles

摘要

Mandrel for mounting of drill (9) uses converging jaws (5) in bores (10) going through the mandrel body (6). The jaws are controlled by a nut (13) to move between a position far from the drill and another in contact with the drill. The mandrel body has an annular cavity (15) located at its front end .