![]() Therefore, it is best to sharpen these bits at the appropriate time. If you use blunt bits, the broken part can damage your fingers, eyes and face. When you sharpen coated drill bits, their coat will remove, and it will act like normal cobalt drill bits. But if your cobalt drill bit has been coated with TiN, TiCN or TiAlN, do not try to re-sharpen it. When you see, the chip size is less than 2mm, it is time to resharpen the cobalt drill bit. In addition, the lifespan of a bit depends on the type of bit used and the drilling technique used. A high level of melting point helps to do the long-period drilling process. Therefore, it can be sharpened when it becomes blunt. And during the production process of cobalt drill bits from HSS drill bits, there has no outer surface painting process.
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