SK three-edged countersink 10.4mm 90° DIN 335 Blue-Tec, Karnasch

Tvrdokovová 3bA ™. conical countersink
Number of balls: 3
angle of balls: 90st.
Maximum diameter: 10.4 mm
Minimum diameter: 2.5 mm
Clamping shank: 6mm
Total length: 50mm < br>
Coating: BLUE-TEC, increases the life of the countersink when cutting with very limited cooling(spray, paste), as well as during dry cutting < br> Material: carbide(pr. 4.3 to 11.5 all-carbide design, 12.4-31mm carbide head with soldered tool steel shank)
Standard: DIN335 C


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

Properties:
Excellent drainage of the pieces, the fight is not chipped, the resulting surface without scratches, great centering of the tool-holes
The grooves The depths are cut with a fine diamond wheel, which makes them sharper and smoother compared to conventional countersinks where the grooves are milled. .
To run is always the highest point of the diameter, ie when sinking, the material does not rub against the wall of the countersink, thus reducing the necessary Cutting force and the heat generated is also reduced -> which increases the life of the countersink.