Tool for removing rivets

In a tool for removing rivets from riveted constructions, said tool having a casing with a head end forming a rivet contacting region that is shaped for emplacement on the head of a rivet that is to be removed and having an interior passage which extends to said rivet contacting region of said head end, a rotary drill bit having a shank end and a cutting end, a rotatable drill bit carrier engaging said shank end of said drill bit and being slidable along said passage to travel said cutting end of said bit into a rivet at said rivet contacting region of said head end, said drill bit carrier having a drive rod for coupling said carrier to a drive motor which drive rod extends out of said casing, wherein the improvement comprises:

• said casing having a tubular body and a head end member which forms said head end of said casing including said rivet contacting region, said body and head end member having abutted ends which maintain said body and head end member in fixed relationship relative to each other during operation of said tool, said head end member of said casing being detachable from other portions of said casing and being replaceable with other head members which have differing rivet contacting regions,
• further including stop means for limiting travel of said drill bit carrier and drill bit in the direction of said head end member which means enables selective variation of the maximum amount of said travel and thereby enables selection of the maximum distance that said cutting end of said bit can penetrate into a rivet.