Countersink 90°, HSS-XE+Blue-Tec, RAPID-CUT 3-flat-shank, DIN 335 d=8,3mm

The flutes of Karnasch High-Performance countersinkers are always CBN ground. This guarantees: Excellent chip clearance / chatter-free working / scratch-free surface / best centering. HSS-XE steel + BLUE-TEC coated Made of high-alloyed special steel XE“ for considerably longer service life than HSS-Steel.
BLUE-TEC coating for a further substantial increase in service life also when machining dry (no/little cooling) RAPID-CUT specially developed for automatic and quick feed. Optimized
cutting geometry + 3 flat sections of the shank leads to: up to 30% faster sinking than conventional countersinks up to 40% higher service life 3-Flat shank for:
– Excellent torque transmission
– No slippage in the drill chuck
– This results to superior cutting output According to the diameter radially-adjusted CBN ground relief.
Result: The cutting edge is always the highest point of the diameter Each diameter receives its own relief angle.
Result: The cutting edge is also always the highest point. CBN deep-ground flutes leads (unlike miled grooves) to significantly smoother and sharper cutting edges. This result is: Higher cutting performance and tool life. Axial relief produces by CBN grinding leads to a smooth and low-heat cut.