Extreme twist drill bits are ideal for drilling a precise hole in high-resistant metals. The twist drill bits are particularly stable and made of cobalt-alloyed high-speed steel HSSE
The high-alloy tool steel allows up to four times higher cutting speeds than conventional tool steel. Due to the cobalt alloy (5%), the material is more heat-resistant and has a higher hardness than HSSG drills. It retains its hardness up to approx. 600-650 °C and allows to drill with extremely high runout accuracy
Suitable for iron, steels, bronze up to 1300 N/mm², high-strength CrNi-based alloys, rust-resistant steels, acid-resistant steels, heat-resistant steels, wood, aluminium. Of course, it's also possible to drill in wood and aluminium
The cutting direction is right and the point angle is 118° (d < 2.9mm), 135° (d > 3mm)
DIN 338. Cylindrical shank
Twist drill bits with cylindrical shank are suitable for use in all drill chucks and have ideal self-centring properties
The design with reduced shank makes it possible to use drills that have a larger diameter than the matching drill chuck. This makes the twist drill bit suitable for all common hand drills