Counterbores and Countersinks GR.1

INTERCHANGEABLE COUNTERBORES TYPE 1HI

Counterbores 2 flutes With interchangeable insert in M.D. CP30 from Ø 24 to Ø 33

Counterbores with 2 flutes type HI-HI/T group 1 in hardness and tempered steel with hardness 42 ÷ 45 HRC, from Ø 24 to Ø 33. 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.

INTERCHANGEABLE COUNTERSINK TYPE 1S

COUNTERSINK CUTTER 3 FLUTES 90° or 60° in HSS HRC 63

Countersink cutters 90°-60° type S group 1 in HSS hardness 63 HRC, from Ø 12,4 to Ø 31. You can fit them in all the Polledri holders of the same group. These cutters with 3 flutes are manufactured to solve in rational way all the problems of countersinking. Their main characteristic,as well as the possibility to execute simultaneous operations with pilots or drill, is high performance without vibration.

INTERCHANGEABLES COUNTERBORES TYPE 1H

COUNTERBORES WITH 3 FLUTES in Hard Metal ISO K30 from Ø 12 to Ø 40.

Counterbores with 3 flutes type H-H/T group 1 in hard metal quality ISO K 30 from Ø 12 to Ø 40. Helix angle 5°. You can fit them in all the Polledri holders of the same group. These counterbores are manufactured to solve all the problems of counterboring head screw and spot facing on cast iron, bronze etc. With rotatory pilots or drills you can execute simultaneous operations. We advise them for materials with short and normal chip.

INTERCHANGEABLES COUNTERBORES TYPE 1N

COUNTERBORES WITH 4 FLUTES in HSS HRC 63 from Ø 10 to Ø 40.

Counterbores with 4 flutes type N-N/T group 1 in HSS hardness 63 HRC, from Ø 10 to Ø 40. Helix angle 40°. You can fit them in all the Polledri holders of the same group. These counterbores are manufactured to solve all the problems of cylindrical head screw counterboring and spot-facing. With rotatory pilots or drills you can execute simultaneous operations. We advise them for materials with short and normal chip.

INTERCHANGEABLES COUNTERBORES TYPE 1W

COUNTERBORES WITH 2 FLUTES in HSS HRC 63 from Ø 10 to Ø 25.

Counterbores with 2 flutes type W group 1 in HSS hardness 63-HRC from Ø 10 to Ø 25, Helix angle 25°. You can fit them in all the Polledri holders of the same group. With rotatory pilots or drills you can execute simultaneous operations. We advise them for materials with long and normal chip.