Stepped spiral drills

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  Spiralstufenbohrer 4-32 mm

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  • made of hardened high speed steel HSS 4241;
  • special coating of titanium nitride increases durability and extends the usage time 4 times;
  • precise, high speed drilling;
  • untwisted and thicker core ensures resistance to cracking during operation;
  • diameter 4 – 32 mm;
  • number of steps 15 (4, 6, 8 ,10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm);
  • effective removal of swarf and heat dissipation reduce the risk of overheating and extend lifetime of the drill bit;
  • two spiral cutting grooves significantly increase the speed and efficiency of work as well as lifetime of the drill bit;
  • 1/4” HEX drive enables quick and reliable seating in drills as well as drill-drivers or adaptors;
  • point angle of 118◦ and the conical shape of the drill – they do not require prior drilling or marking drilling points;
  • auto-deburring – automatic deburring and edge smoothing during drilling, so that manual hole processing is not necessary;
  • made in accordance with DIN 1412C standard;
  • maximum material thickness is 4 mm;
  • markings on the surface of the drill enables controlling the correct diameter of the hole to be made.