CNC Drilling Tools Coolant Indexable Straight Shank Tungsten Carbide Twist Drill Bits
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| Drill Grade | | | | | | |
| HRC55 coating | | | | | | |
Carbide Material Introduction |
| Drill Grade | | | | |
| HRC55 carbide material | | | K44 is ultra fine grain and containes Ni and Cr element, which provides high strength and good toughness. | Carbon Steel, Mould Steel, Tool Steel, Stainless Steel, cast iron |






