BB Countersink Drill Tipped Carbide 90 Degree Diameter:20mm 5 D20 75 150 4T

5 D20 75  150  4T 20R1 D20 45  100  4T 20R1 D20 75  150  4T 20R2 D20 45  100  4T 20R2 D20 75  150  4T 20R3 D20 45  100  4T

After the hexagonal hole is finished

5 D4 8  50  4T 4R0

· From Roughing to Finishing – One tool handles multiple stages

5 D10 30  75  3T 10R1

BB Countersink Drill Tipped Carbide 90 Degree Diameter:20mm 5 D20 75 150 4TBB Brazing Countersink Cutter In order to ensure the firmness of the drill bit, we adopted a brazing method to weld carbide inserts. In this way, the drill bit can process harder metal (compared with HSS countersinks). But this will make the appearance of the drill bit not good looking. We hope you don't mind. Because the cutting edge of carbide material is very crisp, them machining environment needs to be stable to reduce beating. It performs well