HSS-XE Blue-Tec Coated Countersink, Unequal Pitch, DIN 335, Type C, 90 Degree, 3 Flat Sided Shank

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)

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.