GROUP 6-9-14-20-30-40
Polledri Interchangeable Back Spotfacing Counterbores with 3 flutes in HSS hardness 63 HRC from Ø 12 to Ø 125.
You can fit them on all the Polledri arbors in the same group.
You can fit them on the arbors quickly with the special quick change bayonet system.
Using a good soluble oil you can increase the speed with an increase of the tool life.
With groups 14-20-30-40, it’s possible to use the tools for forward spotfacing operations.

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![[cml_media_alt id='4525']logo_ittc_2.1[/cml_media_alt]](https://www.polledri.it/web/wp-content/uploads/logo_ittc_2.1-e1453904531824.jpg)