Ball end mill

Details Ball end mill Ball end mill

1989-06-30

1990-06-19

Terrell, William

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

407 54, 407118, 407119, B23C 510, B23C 514

Patent

active

049348817

ABSTRACT:
A ball end mill including an elongated body, a center insert, and a plurality of cutting inserts. The center insert and the cutting inserts are mounted on the forward end of the body. The center insert and each of the cutting inserts are adjacent to each other in such a manner that the center insert is located with a part thereof at the center. The center insert which is made of cemented carbide has cutting edges passing through the center axis. The cutting inserts are made of a super hard sintered compact. Each of the cutting inserts has a cutting edge aligned to the cutting edge of the center insert. The cutting edges of the cutting inserts and the center insert cooperate to draw a hemispherical path on rotation.

REFERENCES:
patent: 4280774 (1981-07-01), Hayama
patent: 4521172 (1981-02-01), Durand
patent: 4623285 (1986-11-01), Costil

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