BB Carbide Drill 8xD CNC Long Deep Hole Machining Coated Flute Internal Coolant for Steel Metal Tool Diameter 3-16mm Hole Diameter:10.9x12x114x162 reducing tool changes and preventing

reducing tool changes and preventing oxidation

Hex S=6~10mm

and chamfering can also be carried out for complex workpiece shapes

improving processing efficiency

BB Carbide Drill 8xD CNC Long Deep Hole Machining Coated Flute Internal Coolant for Steel Metal Tool Diameter 3-16mm Hole Diameter:10.9x12x114x162 reducing tool changes and preventingBB Carbide Drill 8xD *It is recommended to add guide hole before drilling. There is a slight difference in length between internal and external cooling. External: 3 3. 7 x6x34x72 3. 8 4. 7 x42x81 4. 8 6. 0 x6x57x95 6. 1 8. 0 x8x76x116 Two series of internal cold drilling: BK2055 and BB2055. Please note that there are two types of drill bits: internal cooling (with cooling holes) and external cooling (without cooling holes). Please be careful to select