Counterbores 2 flutes With interchangeable insert in H.M. CP30 from Ø 18 to Ø 23
You con fit them in all the Polledri's mandrels 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 an high power machine.
You can use high feeds because the two inserts are concentric, for this the chip is distributed equally.