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Aubuchon Hardware Tip: A twist bit, like other drill bits, can be sharpened many times before it must be thrown away. Depending on the length of the drill bit, you may get as many as 200 sharpenings out of a single bit! That's because sharpening only removes about a twenty-thousandth of an inch from the drill bit. The good thing for casual users is that the coating is probably most effective on metal, so you won't lose much if you need to sharpen these coated twist bits. If you do work with metal, you may wish to replace the bit instead.
|Jennifer Mathes, Ph.D.|