UNIVERSAL CHUCK FOR A MACHINE FOR PIERCING A TAP HOLE OF A SHAFT FURNACE

摘要

UNIVERSAL CHUCK FOR A MACHINE FOR PIERCING A TAP HOLE OF A SHAFT FURNACE A universal chuck is provided which enables both a tensile force to be transmitted to the end of a rod and a rotational moment to be transmitted to a drill bit on a machine for piercing a tap hole. This universal chuck comprises a rotary body mounted on the drive spindle of a working member which can slide on the piercing machine. A support structure which is integral with the working member forms a guide cage around the rotary body. Means for transmitting a tensile force to the end of a rod and a rotational moment to a drill bit are arranged around a front cavity in the rotary body. Fig. 1