Drill and a method of producing it

B - Operations – Transporting – 23 – B

Patent

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76/20, 77/35

B23B 51/02 (2006.01) B22F 5/10 (2006.01) B23B 51/06 (2006.01) B23P 15/32 (2006.01)

Patent

CA 1214055

ABSTRACT A drill having a metal bit carrier on which a sintered metal bit is mounted. The bit has at least one enclosed helical cooling channel which continues in alignment into a corresponding cooling channel in the bit carrier The cooling channel in the bit carrier may be spiral or straight. It may run in a flight of the carrier or may be formed in the carrier made as a double creased tube. The bit may be single or double lipped with one or more cooling channels formed in it. The drill has great mechanical and thermal stability, and is not adversely affected by the system of cooling channels in the interior of the drill. Service life and cutting power of the drill can be increased. The geometry of the drill can be optimally adapted to the particular material intended to be worked.

446924

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