Punch and die adapter

Details Punch and die adapter Punch and die adapter

1984-11-01

1986-06-17

Schran, Donald R.

Cutlery

Perforating or indenting implements

With portion positioned in work aperture

B26F 132

Patent

active

045947791

ABSTRACT:
The adapter member includes a threaded male portion adapted for threadable engagement in a threaded bore of the punch and a threaded female portion of smaller diameter adapted for threadable engagement with a small diameter threaded end of the draw stud which can pass through an initial small diameter pilot hole in the workpiece. The adapter member allows the punch to accommodate a draw stud of sufficiently small diameter to fit through the pilot hole and allows punching of a larger diameter hole in light gage or non-ferrous materials without enlarging the pilot hole. This arrangement eliminated the need in the past for the additional step of enlarging the pilot hole to accept a draw stud of larger diameter that was threaded directly into the thread bore of the punch for punching larger diameter holes in both heavy and light gage material.

REFERENCES:
patent: 2735489 (1956-02-01), Fowler
patent: 4057899 (1977-11-01), Ostendorf
patent: 4403417 (1983-09-01), Wilson et al.

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