Combined hole making and threading tool

Cutting by use of rotating axially moving tool – Tool or tool with support – Having inversely angled cutting edge

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Details

10141R, 408222, 409 74, B23G 520

Patent

active

047618442

ABSTRACT:
A combination tool is disclosed for drilling a hole in a workpiece on the inward feed of the tool and for threading the hole during retraction of the tool. The tool comprises a straight body with a drill point at the forward end, a shank at the rearward end and a thread-form mill between the drill point and the shank.

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patent: 3258797 (1966-07-01), Budd
patent: 4271554 (1981-06-01), Grenell
patent: 4375708 (1983-03-01), Hellnick
patent: 4409868 (1983-10-01), Huddle et al.

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