Precision twist drill sharpener/point splitting machine

Details Precision twist drill sharpener/point splitting machine Precision twist drill sharpener/point splitting machine

1993-03-19

1995-03-28

Lavinder, Jack W.

Abrading

Machine

Rotary reciprocating tool

451140, 451138, 451 48, B24B 324

Patent

active

054005469

ABSTRACT:
A twist drill sharpener employing a pair of rotary grinding wheels has three primary drill chuck receiving openings, one for alignment of the twist drill and cams on the twist drill chuck; a second receptacle for grinding the end of a chucked twist drill; and a third receptacle which receives the drill and chuck for grinding a split point on the sharpened twist drill.

REFERENCES:
patent: 2109308 (1938-02-01), Adams
patent: 4001975 (1977-01-01), Bernard et al.
patent: 4471581 (1984-09-01), Bernard et al.
patent: 4485596 (1984-12-01), Bernard et al.
patent: 4916866 (1990-04-01), Bernard et al.
patent: 5097634 (1992-03-01), Hulme
patent: 5179809 (1993-01-01), Schroeder

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