Ruko Terrax HSS-G Spiral Drill Bits 8.5 mm Pack of 10 in Plastic Pack

• Ground twist drill bit made of high speed steel.
• The complete ground spiral bit has an increased concentricity.
• Powerful twist drill suitable for all normal drilling in conventional materials.

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 performance speed steel. The complete ground spiral bit has an increased concentricity. Applications: for steel, cast steel alloyed and unalloyed (up to 900 newtons/mm of ²strength), grey, malleable, ductile and pressure castings, sintered iron, nickel silver, graphite, short chipping aluminium alloys, brass and bronze. Specifications: Diameter: 8.5 mm. Overall length: 117.0 mm. Spiral length: 75.0 mm. Point geometry: 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: 10 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.