Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1976-09-14
1978-12-12
Smith, Gary L.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51309R, 175409, 408145, 408704, B24D 1700
Patent
active
041289714
ABSTRACT:
An abrasive drill of small diameter is provided with a cored portion that is eccentric, i.e., lacking a substantial concentric portion, relative to the longitudinal axis of the drill. The core, regardless of shape, is located so that during drill rotation all of the surface of a workpiece within the outline of the end of the drill is abraded by some part of the rotating end of the drill. The drill composition comprises abrasive particles in a less abrasive matrix, and the core is not hollow but comprises relatively non-abrasive material. The drill is formed by deposition of matrix material entraining abrasive particles onto a taut filamentary mandrel. The mandrel preferably comprises one or more round filaments, either straight or twisted together, alongside the longitudinal axis of the drill, and may be metallic, such as copper wire or may be non-metallic, such as nylon or other synthetic polymeric textile fiber composition. The drill diameter may be on the order of a millimeter or so or smaller.
REFERENCES:
patent: 1625463 (1927-04-01), Gauthier
patent: 1634708 (1927-07-01), Chayes
patent: 1641206 (1927-09-01), Smith
patent: 2324377 (1943-07-01), Fischer
patent: 2643945 (1953-06-01), Buckner
patent: 3295941 (1967-01-01), Spellman
patent: 3372010 (1968-05-01), Parsons
patent: 3427759 (1969-02-01), Kistler
patent: 3436871 (1969-04-01), Schneider
patent: 3547608 (1970-12-01), Kitazawa
patent: 3850590 (1974-11-01), Chalkley
Dunnington Bruce W.
Gernert William B.
Glennel Corporation
McClure Charles A.
Smith Gary L.
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