Carbide countersink 90° DIN335C , Karnasch

Tvrdokovový 3bř. countersink

Maximum diameter: according to the selected variant
Minimum diameter: see product description for selected variant
Clamping shank: see product description for the selected variant, with three anti-rotation surfaces
Edge angle: 90st.
Overall length: see product description for selected variant

Coating: BLUE-TEC, increases the life of the countersink when cutting with very limited cooling (spray, paste), as well as when cutting dry
Material: carbide (diameter 4.3 to 11.5 all-carbide design, 12.4-31 mm carbide head with brazed shank made of tool steel)
Standard: DIN335 C

Usage:
Hardened steel up to 50 HRC
Alloy steel with tensile strength up to 1400N / mm2
Stainless steel with tensile strength up to 900N / mm2
Gray cast iron
Aluminum alloys with silicon content> 10%
Copper, brass, plastics
Hardox, Hastelloy, Inconell, Nimonic and other special alloys

Features:
Excellent chip evacuation, cutting edge, resulting surface without scratches, excellent tool-hole centering
The countersink grooves are ground with a fine diamond wheel, which makes the cutting edge sharper and smoother compared to conventional countersinks where the grooves are milled.
The cutting edge is always the highest point of the diameter, ie during countersinking the material does not rub against the wall of the countersink, which reduces the required cutting force and also reduces the heat generated -> which increases the service life of the countersink.