High performance twist drill made of K 20 solid carbide with TiAIN wear-resistant coating

The requirement for dry cutting or minimal lubrication is found in an increasing number of application fields among metal-working companies. The demands of tools are disproportionally much higher. A high level of hardness, durability, heat stability and an excellent surface with a low friction coefficient are the requirements needed in order to be able to ensure process reliability. Against this background, RUKO has introduced new high performance twist drills to its range made of solid carbide with a wear-resistant coating. The twist drills are made of K20 carbide. The material is distinguished by its fine grain size of approx. 0.7 µm. This enables the tool to be very durable and gives it a considerably sharper cutting ability.

» Solid carbide twist drill TiAlN coated

Point cut: helical point
from Ø 3,0 mm with split point DIN 1412 C
Point angle: 118°
Helix angle: 20° - 30°

Ø-tolerance: h8

Standard: DIN 338 type N
Material: K20-TiAlN
Cutting direction: right hand cutting
From Ø 3,0 mm up to Ø 13,0 mm available.

Compared with other types of carbide with grain sizes up to approx. 2.5 µm, a cutting quality similar to HSS drills is achieved. With a hardness of approx. 1,700 (HV30), however, it is far superior to the HSS quality. In order to eliminate cases of chip and crater welding during metal working, the twist drill is also equipped with a TiAIN (titanium aluminium nitride) wear-resistant coating. This coating increases the surface hardness to approx. 3,000 HV. The heat resistance is increased to around 900°C. The high surface quality reduces friction, ensures better chip removal and a very good cutting quality. These properties make the twist drill particularly good for high strength steels or abrasive materials such as aluminium with a high silicium content whilst maintaining equally high cutting speeds.

» Technical data