COUNTERBORES WITH 2 FLUTES WITH INSERT

Counterbores with 2 flutes type HI-HI/T group 0-1-2 in hardness and tempered steel with hardness 42 ÷ 45
HRC, from Ø 18 to Ø 60. Helix angle 7°. You can fit them in all the Polledri holders of the same group.
With fixed or rotating pilots, or drills you can execute simultaneous operations. We advise them for materials
with high hardness, cast iron and steel, if you have a high power machine. You can use high feeds because the
two inserts are concentric, for this the chip is distributed equally.