Installation drill

Details Installation drill Installation drill

1985-08-07

1988-06-28

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

144219, 407 54, 408225, B27G 1500

Patent

active

047535580

ABSTRACT:
The present invention concerns in brief a drill (1) for making of preferably through installation bores, through which bores flexible shafts, cables and the like can be lead in. The drill (1) comprises a bore crown (2) and a shank (3). The bore crown (2) has main cutting edges (6, 7) for forward drilling, side cutting edges (8) for radial drilling, and end cutting edges (9) for rearward drilling. The shank (3) preferably has a significantly smaller thickness than the area being drilled by the main cutting edges (6, 7).

REFERENCES:
patent: 949126 (1910-02-01), Lyons
patent: 1385750 (1921-07-01), Pollock
patent: 1446194 (1923-02-01), McCullough
patent: 1461376 (1923-07-01), Bartlett
patent: 3920350 (1975-11-01), Southall

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