Tool bit with axially extending grooves in insertion end

Details Tool bit with axially extending grooves in insertion end Tool bit with axially extending grooves in insertion end

1989-05-25

1991-10-08

Schwartz, Larry I.

Cutting by use of rotating axially moving tool

Tool or tool with support

Including detailed shank

B23B 5100

Patent

active

050549731

ABSTRACT:
A tool bit has a body (1) with an axially extending insertion end (2) for insertion into a chuck on a drive unit. The insertion end (2) has closed ended axially extending grooves (4) and axially extending grooves (5) open at the trailing end of the insertion end. The open end grooves have a base (6) with a shaped configuration (7). The shaped base has depressions or recesses (8) forming stop faces (9) extending transversely of the axial direction and acting essentially in the axial direction of the insertion end. When the insertion end (2) is placed into the chuck, any dirt on the stop faces (9) can be wiped off and deposited in the recesses (8). The shaped configuration (7) of the base (6) prevents, during formation of the axially extending grooves (4, 5), by means of grooving tools rolling in the axial direction of the insertion end (2), any undesirable length changes in the insertion end while affording sharp-edges rolling of the shaped configuration.

REFERENCES:
patent: Re31755 (1984-12-01), Wanner et al.
patent: 2457132 (1948-12-01), Delaney
patent: 4123074 (1978-10-01), Wanner
patent: 4273344 (1981-06-01), Benson et al.
patent: 4290617 (1981-09-01), Yoshida
patent: 4536109 (1985-08-01), Hunger et al.
patent: 4565472 (1986-01-01), Brennsteiner et al.
patent: 4702651 (1987-10-01), Kleine
patent: 4725173 (1988-02-01), Hoffman et al.
Drilling Technology, p. 32, 1977.

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