Composite sintered twist drill

Details Composite sintered twist drill Composite sintered twist drill

1985-06-03

1988-08-09

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool of specific diverse material

408145, 408230, B23B 5102

Patent

active

047624450

ABSTRACT:
A helically fluted twist drill apparatus in which offset, opposed veins of sintered abrasive particulate, such as diamond, are embedded within a drill blank made of a less abrasive material such as carbide. The non-aligned veins of abrasive material, in one embodiment, themselves intersect through juxtapositioning adjacent the point and web of the drill, and in another embodiment, rely upon the interpositioning of a third intermediate vein which, in turn, intersects at least part of both the first and second nonintersecting veins, to describe a more economical and effective highly abrasive material region at the drill point and web locations.

REFERENCES:
patent: 1887372 (1932-11-01), Emmons
patent: 3106973 (1963-10-01), Christensen
patent: 3136615 (1964-06-01), Bovenkerk et al.
patent: 4160616 (1979-07-01), Winblad
patent: 4359335 (1982-11-01), Garner
patent: 4403015 (1983-09-01), Nakai et al.

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