COUNTERBORES – POLLEDRI SRL

PILOTED COUNTERBORES AND COUNTERSINKS

Polledri Srl

New Piloted Counterbores and Piloted Countersinksfor M1 to M6 DIN 373 and DIN 1866.Made in HSS-E Co. HRC 65 with cylindrical shank, 180° and 90°.You can use them to realize Fine, Medium, Close or Before Threading common screw seats

Polledri Interchangeable Counterbores 2 Flutes with Insert

Polledri Srl

Polledri Interchangeable Counterbores 2 Flutes with Insert 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 […]

Polledri Three Flutes Counterbores Solid Carbide

Polledri Srl

Polledri Three Flutes Counterbores Solid Carbide type H-H/T group 0-1-2 in hard metal quality ISO K 30 from Ø 10 to Ø 85. 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 […]

Polledri Two Flutes Interchangeable Counterbores

Polledri Srl

Polledri Two Flutes Interchangeable Counterbores type W group 0-1-2 in HSS hardness 63-HRC from Ø 7 to Ø 40, 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.

Polledri Interchangeable Counterbores Four Flutes

Polledri Srl

Polledri Interchangeable Counterbores Four Flutes type N-N/T group 0-1-2 in HSS hardness 63 HRC, from Ø 7 to Ø 85. 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 […]