Drill with coolant channels and method for its manufacture

Details Drill with coolant channels and method for its manufacture Drill with coolant channels and method for its manufacture

1996-03-04

1997-10-14

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

408223, 761086, B23B 5106

Patent

active

056764995

ABSTRACT:
A spiral drill includes a rear shank portion; a front tip; and a spiral (helical) middle portion extending therebetween. Spiral ribs are formed in the middle portion, and coolant channels extend through the drill to the tip for conducting coolant fluid. The coolant channels form exit openings in the tip which are spaced at different radial distances from a centerline of the drill. Each coolant channel extends spirally through a respective rib, and the portion of each coolant channel disposed in the shank is straight. Those straight portions are spaced by different radial distances from the centerline.

REFERENCES:
patent: 1746716 (1930-02-01), Sasse
patent: 2811875 (1957-11-01), Cogsdill
patent: 3073189 (1963-01-01), Paige
patent: 3504575 (1970-04-01), Makino et al.
patent: 4704055 (1987-11-01), Guhring
patent: 4826364 (1989-05-01), Grunsky
patent: 5509761 (1996-04-01), Grossman et al.

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