Under hard field conditions only in the rarest cases optimum speed and cooling can be considered.
The Karnasch DURABLUE coating makes twist drill bits decisively more resistant. This results finally to an extraordinary increase of lifetime.
Drill-Line PRO twist drills are the right choice for most difficult materials. For less difficult materials, see art. 201710 and 201840.
Made of ASP powder steel for drilling of difficult materials like railway tracks, stainless steels, exotic alloys. Applicable wherever a high wear resistance and lifetime are required.
Karnasch twist drills are produced in a heavy-duty geometry for immediate self-centering, easy cutting and highest lifetimes.
Diameter 6 - 16 mm coolant througt groove on the schank.
Diameter 17 - 27,5 mm with internal cooling supply.
Our first-class twist drills are equipped with the unique and patented DURABLUE coating.
Extreme surface hardness and steekness yield extreme lifetimes even under non-optimum conditions like overhead work, dry- drilling, etc.
Further dimensions and cutting depth 50 mm, see art. 201465
For drilling in all steels up to 1400N also in difficult materials like railway tracks, stainless steels, exotic alloys. Applicable wherever a high wear resistance and lifetime are required. Ideal for all kinds of railway tracks up to 1100N (60UIC). More than 100 drills in UIC 6 possible.
WELDON-SHANK 19/32 MM (3/4"+1.1/4")
Matching machines made by:
KARNASCH, ALFRA-ROTABEST, ALFRA ROTAQUICK, BDS, BDS KEYLESS, BEKTOP, BUX, CEMBRE, DUBUIS, ERICO, EUROBOOR, EVOLUTION, HALL (POWERBOR), HOUGEN, JANCY, MAGBROACH, MAGTRON, MAGNETOR, METALLKRAFT, PROMAG, ROTABROACH, RUKO+RUKO EASY LOCK, UNIVERSAL