Spade drill sharpening fixture

Details Spade drill sharpening fixture Spade drill sharpening fixture

1976-05-06

1978-04-18

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

B24B 1900

Patent

active

040843530

ABSTRACT:
A fixture for holding a spade drill on a reciprocable grinder table during the sharpening thereof comprises a base for resting on the grinder table, a rocker supported on the base and pivotable to various fixed positions for providing a selected dip angle, and means for supporting the spade drill on the upper side of the rocker in a predetermined angular relation with respect to the horizontal table surface, such angular relation providing the rake angle for enabling grinding the top-rake flat of the drill. The base can be tilted to rest on a rear support surface which is disposed in a predetermined angular relation to enable grinding of the clearance portion of the spade drill at a proper angle. Selection of skew angle is also provided as a feature. The fixture can accommodate an entire series of spade drills to be ground to various dimensional specifications.

REFERENCES:
patent: 2394202 (1946-02-01), Pollard
patent: 2521230 (1950-09-01), Larson
patent: 2521231 (1950-09-01), Larson
patent: 3065580 (1962-11-01), Benjamin
patent: 3183634 (1965-05-01), Sweeny
patent: 3395496 (1968-08-01), Sweeny

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