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A Complete Guide to the Different Types of Drill BitsOne downside: At high drill speeds, they can overheat and soften, becoming dull. This is especially common when drilling metal. High-speed steel (HSS) bits are capable of prolonged drilling ...
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House Digest on MSNThe Best Method For Sharpening Dull Drill Bits To Bring Them Back To Lifewhereas cobalt is typically used for harder materials like cast iron or stainless steel. Tungsten-carbide tipped (TCT) and ...
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