Drill and cutting insert therefor

Details Drill and cutting insert therefor Drill and cutting insert therefor

1985-10-31

1987-03-10

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

407113, 408186, 408713, B23B 5100

Patent

active

046487603

ABSTRACT:
The invention relates to a short-hole drill and a cutting insert therefor, for drilling of metallic work pieces. The drill comprises a drill shank with two chip flutes formed therein and with two cutting insert sites and two mainly rectangular cutting inserts having mutually identical shaping. The cutting inserts are accommodated in the cutting insert sites and secured thereto by means of lock screws such that the broken non-active cutting edge abuts against a broken support surface in each cutting insert site while the active cutting edge projects axially forwards. The cutting insert which is arranged radially outermost is inclined such that it determines the size of the bore while the longitudinal axis of the other cutting insert is arranged parallel to the center line (CL) of the drill. The distance between the outermost parts of each cutting edge is longer than the shortest distance between the long side surfaces of the cutting insert.

REFERENCES:
patent: 3955259 (1976-05-01), Gustafsson
patent: 4124328 (1978-11-01), Hopkins
patent: 4220429 (1980-09-01), Powers et al.
patent: 4268198 (1981-05-01), Peters
patent: 4475851 (1984-10-01), Hale
patent: 4527931 (1985-07-01), Sarin
patent: 4558975 (1985-12-01), Hale
patent: 4563113 (1986-01-01), Ebenhoch
patent: 4564321 (1986-01-01), Rondo et al.

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