Walter has expanded its line of Walter Titex X-treme DM micro drills with eight new models, in drilling depths ranging from 2xD to 30xD.

Because of an advancement in carbide technology, special coatings, and design, the drills are able to outperform conventional micro drilling tools.

Traditionally, gun drills have been predominate over twist drills in micro drilling (i.e., drilling holes with 3 mm dia. or less) applications.

Due to micro drilling’s high toughness requirements, twist drills could only be manufactured from high speed steel (HSS). As a result, cutting speeds and feed rates were low, the holes had to be constantly cleared of swarf.

However, special carbide grades with a high level of toughness are now available which allow the manufacture of thin, long twist drills capable of high cutting parameters.

Walter has equipped its X-treme DM line of micro drills with an array of performance enhancing features, prime among them being internal cooling.

Other features include optimized point geometry with special cutting edge preparation and flute geometry to ensure superior chip formation.

These drills also feature special aluminum-titanium nitride coatings that counteract wear and increase tool life and are suitable for ISO material groups P, K, M, N, S and H. The drills are also suitable for the use on titanium in some applications.

The drills are also designed to make holes in one operation without pecking, which can help improve productivity in the 50-100 per cent range.

Walter offers an extensive line up of cutting tools for milling, drilling, turning, boring and specialized tooling for unique applications through its competence brands Walter Valenite, Walter Titex and Walter Prototyp.

www.walter-tools.com