Combined hole making and threading tool

Details Combined hole making and threading tool Combined hole making and threading tool

1986-03-17

1987-03-24

Briggs, William R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

10141R, 408222, 409 74, B23G 520

Patent

active

046513744

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.

REFERENCES:
patent: 279360 (1883-06-01), Douglas
patent: 1034724 (1912-08-01), Mueller
patent: 2286477 (1942-06-01), Falls
patent: 3258797 (1966-07-01), Budd
patent: 4271554 (1981-06-01), Grenell
patent: 4375708 (1983-03-01), Hellnick

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