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5 D4 10 50 4T 8 3R0
and chamfering can also be carried out for complex workpiece shapes
improving processing efficiency
--Adequate cooling
reducing tool changes and preventing oxidation
BB Carbide Drill 8xD CNC Long Deep Hole Machining Coated Flute Internal Coolant for Steel Metal Tool Diameter 3-16mm Hole Diameter:10.9x12x114x162 5 D4 10 50 4TBB 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
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