Cylindrical bit

Details Cylindrical bit Cylindrical bit

1992-05-07

1994-05-17

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

408213, 408225, B23B 5100

Patent

active

053122070

ABSTRACT:
A cylindrical bit including a drill head with a centering tip, two circumferential cutters, two main cutting edges extending approximately radialy, and two chip channels associated with main cutting edges. The chip channels are open toward a circumferential surface and toward a rear of the cylindrical bit. To improve chip removal, each chip channel bottom surface is rounded in a curved fashion and blends continuously with the respective chip surfaces of the corresponding main cutting edges and with chip channel side walls opposite the respective chip surfaces.

REFERENCES:
patent: 41517 (1864-02-01), Low
patent: 3180379 (1965-04-01), Stewart
patent: 4012970 (1977-03-01), Hintz et al.
patent: 4565473 (1986-01-01), Hosoi

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