90° countersink set, 6.3-20.5 mm FL3 spiralled

• Universal geometry with 3 spiraled cutting edges and unequal pitch
• Cutting material HSSE, TiAlN-coated
• Low vibration and smooth running
• Clearly reduced feed and radial forces
• Round and chatter-free countersinks
• Wide range of applications
• Versions:
  150272 - with straight shank
  150273 - with 3 clamping surfaces on the shank to prevent slipping in the drill chuck (optimal for hand drills)
  150274 - with extended shank to bridge interfering contours

Usage characteristics

• aluminum < 8% Si
• aluminum >= 8 % Si
• brass short
• cast iron GG/GTS
• cast iron GGG
• austenitic stainless steel
• stainless steel duplex
• stainless steel ferrit./martens.
• steel < 1000 N/mm2
• steel < 1400 N/mm2
• steel < 700 N/mm2
• superalloys Fe/NiCo based < 30 HRC
• titanium alloys