Larry R Rivett

US Patent:

40843530, Apr 18, 1978

Filed:

May 6, 1976

Appl. No.:

5/683668

Inventors:

Reginald O. Schulz - Bridgeport MI
Larry R. Rivett - Bridgeport MI

Assignee:

Houdaille Industries, Inc. - Buffalo NY

International Classification:

B24B 1900

US Classification:

51220

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.