Drill pre-pointing machine

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

Patent

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Details

51215CP, 51219R, B24B 326

Patent

active

041078829

ABSTRACT:
A grinding machine with a high production rate for pre-pointing drill bodies and the like in automatic duty cycles wherein separate grinding heads and a chuck head are respectively shiftable to and from a working position to grind both ends of the drill body simultaneously. The chuck head includes a special through-feeding rotary chuck which is journalled at its periphery and through which the work pieces are loaded and unloaded sequentially and unidirectionally by a fast-acting loading plunger advancing rapidly in an initial portion of its loading stroke, with completion at a slowed rate for accurate lodgement of the drill bodies with both ends precisely positioned for engagement by the grinding wheels.

REFERENCES:
patent: 407721 (1889-07-01), Cox
patent: 1856185 (1932-05-01), Guild
patent: 1926577 (1933-09-01), Behle
patent: 2477730 (1949-08-01), Fouquet
patent: 2814168 (1957-11-01), Wells
patent: 2897635 (1959-08-01), Stephanoff
patent: 3711997 (1973-01-01), Kushigian

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