Drilling and/or chiseling tool

Details Drilling and/or chiseling tool Drilling and/or chiseling tool

1998-01-23

2000-07-18

Neuder, William

Boring or penetrating the earth

Bit or bit element

With helical-conveying portion

175323, 1754201, 408230, E21B 1044

Patent

active

060893370

ABSTRACT:
A drilling and/or chiseling tool is formed basically by a shaping without cutting procedure and has a axially extending shaft (1) with at least three helical drilled material removal grooves (2). The shaft (1) has a shank (3) at its trailing end in the drilling direction, and at the opposite end, leading in the drilling direction is a drilling head (6). The drilling head (6) has a recess for holding a hard metal insert (8). Because of the number of removal grooves (2), the course of the grooves is approximately parallel to the shaft axis, whereby in the drilling head (6) region there is adequate material for laterally supporting the hard metal insert (8). Accordingly, an expensive correction of the shape of the removal grooves (2) in the region of the drilling head (6) can be avoided.

REFERENCES:
patent: 4579180 (1986-04-01), Peetz et al.
patent: 4967855 (1990-11-01), Moser
patent: 5553682 (1996-09-01), Batliner et al.
patent: 5641028 (1997-06-01), Resendez et al.
Patent Abstract of Japan No. 59 007511.

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