Diamond twist drill blank

Details Diamond twist drill blank Diamond twist drill blank

1989-08-14

1991-02-12

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Drill

76DIG11, 76DIG12, 408144, 408199, B23P 1532

Patent

active

049914677

ABSTRACT:
A diamond tipped twist drill for drilling holes in a work piece consists of a body forming a pair of flutes, each flute forming a channel that essentially parallels the flutes. Each channel ends at an aperture formed in the body nearest a cutting end of the drill. Diamond material is pressed into the flutes and through the aperture. Subsequent machining at the cutting end of the drill bit body exposes the sintered diamond forming a finished diamond cutting tip for the twist drill.

REFERENCES:
patent: 1887373 (1932-11-01), Emmons et al.
patent: 1887374 (1932-11-01), Emmons et al.
patent: 1977845 (1934-10-01), Emmons
patent: 4527643 (1985-07-01), Horton et al.
patent: 4627503 (1986-12-01), Horton
patent: 4762445 (1988-08-01), Bunting et al.

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