Drill with balanced inserts

Details Drill with balanced inserts Drill with balanced inserts

1989-05-26

1991-01-15

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool of specific diverse material

408188, 408229, 408713, B23B 5100

Patent

active

049849433

ABSTRACT:
A drill has a shank with a central axis of rotation and at least one insert on one end of the shank. The insert has at least two cutting edges. The first and second cutting edges cooperate to form a hole when rotated about the central axis. One of the top and bottom faces acts as a seating face and the other acts as a cutting face. Cutting edges are formed on opposite sides of the cutting face. One end of each of the first cutting edges terminates in a juncture with a second cutting edge that extends from the cutting face toward the seating face. The first and second cutting edges cooperate to form a radiused hole when rotated about a central axis. The bottom of said hole is cut continuously across its entire area.

REFERENCES:
patent: 3320654 (1967-05-01), Lovendahl
patent: 4124328 (1978-11-01), Hopkins
patent: 4565471 (1986-01-01), Negishi et al.
patent: 4676702 (1987-06-01), Reinauer
patent: 4699549 (1987-10-01), Shimomura et al.
patent: 4770571 (1988-09-01), Potemkin

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