Drill bit centering device

Details Drill bit centering device Drill bit centering device

1995-03-16

1996-04-23

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Frictionally engaging sides of opening in work

408112, B23B 4500

Patent

active

055097626

ABSTRACT:
A drill bit centering device with a substantial intermediate open area between a top locking collar and a bottom centering cone is provided. A drill bit of the centering device is attached in an opening in the top collar and passes through the bottom cone and is surrounded by a spring. The area between the upper and lower members allows for the simple escape of shavings and chips from a drilling operation. The spring serves as the sole connecting member between the sleeves of the collar and cone. The spring, collar, attached bit, and cone rotate as an integral assembly.

REFERENCES:
patent: 2224480 (1940-12-01), Kartarik
patent: 2335614 (1943-11-01), Spievak
patent: 2479774 (1949-08-01), Pierce
patent: 2792726 (1957-05-01), Vick
patent: 4138200 (1979-02-01), Nazarenus

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