BB Micro Drill Bit Shank D=4mm BF2055 Corner Radius BB Unequal Helix Carbide End

BB Unequal Helix Carbide End Mill Series

2 D4 12  50  4T 4  1

5 D20 75  150  3T 20R2 D20 45  100  3T 20R2 D20 75  150  3T 20R2 D20 100  200  3T 20R3 D20 45  100  3T 20R3 D20 75  150  3T 20R4 D20 45  100  3T 20R4 D20 75  150  3T 20R5 D20 45  100  3T

5 D12 40  100  3T 12R1

such as copper and aluminum

BB Micro Drill Bit Shank D=4mm BF2055 Corner Radius BB Unequal Helix Carbide EndBB Mirco Drill 1PCS The whole bit is made of Solid Carbide, which makes the bit more durable. But it also makes it easier to break, so it's forbidden to use electric hand drills and unstable machining environments. Application Steel, stainless steel, cast iron, die steel, circuit board,acrylic and so on. Diameter of shank : 3mm or 4mm Recommended Cutting Conditions *Reference parameters are used as the general standard and need to be adjusted