Twist drills DIN 338 type N HSS G Powerful twist drill suitable for all normal drilling in conventional materials. Ground twist drill bit made of high speed steel. The complete ground spiral bit has an increased concentricity. Applications: for steel, cast steel alloyed and unalloyed (up to 900 newtons/millimetre of ²strength), grey, malleable, ductile and pressure castings, sintered iron, nickel silver, graphite, short chipping aluminium alloys, brass and bronze. Product details: Diameter: 12.2 mm Overall length: 151.0 mm Spiral length: 101.0 mm Grinding: Conical section Point thinning: Split point according to DIN 1412 C Point angle: 118° Spiral angle: 20-30° Tolerance of diameter: h8 Surface: shiny Right-hand cutting Package unit: 5 piece in plastic packaging Split point according to DIN 1412 C Application: For drills with very strong core for particularly tough, hard materials and gun drills. Advantages: Good centring, low feed force. By clamping distribution improved chip evacuation. Cons: Immaculate regrinding only possible mechanically.
