SK 5-br. Countersink 20.5mm 90° Blue-Tec for Hardox, Karnasch

Carbide conical countersink for Hardox

Maximum diameter: 20.5 mm
Blade angle: 90°.
Number of blades: 5
Minimum diameter: 5 mm
Clamping shank: 10mm
Total length: 64mm
For countersinking a screw of size ( screw made according to DIN741) standard: M10

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 (pr. 10.4 full carbide design, 12.4-31mm carbide head with brazed tool steel shank)

Usage:
Hardox 400 , Hardox 450 , Hardox 500
Hardened steel up to 60 HRC
Alloy steel with tensile strength up to 1400N/mm2
Stainless steel with tensile strength up to 900N/mm2
Gray cast iron
Graphite, carbon and plexiglass, reinforced plastics
Hastelloy, Inconell, Nimonic and other special alloys with strength above 850 N/mm2

Warning - carbide / carbide countersinks should only be used on NC/CNC machines.

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

Cat. no. : 4030450205