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Cobalt HSS CO 5% twist drill bit

Professional use above 800N/m2 for metal
5% cobalt twist drill bit


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Special alloys-stainless steel-metal
vorpa en p419431-cobalt-hss-co-5-twist-drill-bit 012 = Suitable application vorpa en p419431-cobalt-hss-co-5-twist-drill-bit 013 = after checking the consistency of the base material


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  • 5% cobalt twist drill bit for use on materials with a tensile strenght above 800N/m2, professional use
  • Cross-ground fnish to DIN 1412 C (5% cobalt from Ø 3,0mm). 135° conical section.
  • Direct drilling without prior centering or drilling of a pilot hole
  • Safe pilot hole drilling, even in slanting surfaces, in pipes and/or welds
  • The feeding power is reduced by up to 50%
  • Even chip removal and reduction of chip friction
  • Extremely true running and precise round holes
  • The drill bit facilitates an increase in drilling progress by up to 45%
  • No jamming of the main cutting edge and no slipping of the drill bit for through-holes
  • High fracture strength and long life
  • Reduced friction due to external diameter tapering in the shank direction
  • Fast drilling progress through chemical thermal method of hardening and accurate cross-ground fnish
  • Due to the alloying addition of 5% Co these drill bits are well-suited for workpieces with a tensile strength of more than 800N/mm2.
  • Extra high temperature strength to cope with suboptimal supply of coolant
  • Up to 20% higher durability than identically constructed HSS drill bits used under the same operating conditions​

Suitable for:
  • A2 stainless steel
  • A4 stainless steel
  • Special alloys
  • Alloyed steel
Suggestions for use:
  • Use special drilling oils in case of extremely hard alloy and heat resistant materials
  • Use normal freezing mixtures for standard steel or low adhesiveness materials
  • Dry-drilling in case of short chips, brass and cast iron
  • Lift the drill bit for time to time in order that the oil can penetrate into the material
  • Sharpen the cutting edges regularly
  • Do not use drill bits with rotopercussion

Cobalt HSS CO 5% twist drill bit

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