![]() Just take your time and you will end up with a very sharp cutting drill bit. This way as I reach the cutting edge all of my angles should be the same. I like to start from the trailing edge and work my way forward just taking a very small amount of material away. The process to sharpen a drill bit with a file is the same as using a bench grinder or Dremel. The benefit of using a diamond file is they cut in both directions, unlike a regular file that only cuts on the push stroke. For more expensive files the manufacturers use a process of electroplating diamond on to a steel file blank using nickel.Īs diamonds are one of the hardest materials on this earth they are great to use as a cutting agent. This means we must use a diamond file to put a cutting edge onto a drill bit.ĭiamond files use thousands of miniature diamonds which have been glued on to a base. The problem with sharpening a drill bit with a regular file is both metals have been hardened. Any wobbling, squealing or excessive heat generation may indicate an incorrect sharpening edge. We don’t want any high spots.ĭrill a test hole to make sure your drill bit is cutting nice and true. Try regrinding at a steeper angle, so that the heel or trailing edge of the cutting tip is formed behind the cutting edge. If the bit doesn’t cut very well, you may have ground down too heavily on the cutting edge, versus on the heel of the bit. ![]() If only one side is cutting you will need some more sharpening of the drill bit. Each chip or swarf should come out even in the drill flutes. Often all that is needed is a new cutting edge which should only take a few seconds of grinding.įor a real test clamp down a piece of metal or wood and use a battery drill to make a hole. This is all done by eye and it may take a few goes to get it perfect. Keep looking at the face or tip of the drill to see how it looks. Make sure that point angle is exactly the same on each side of the drill bit otherwise, you will have excessive vibrations when drilling which may cause the bit to jam or break. Excessive heat will decrease the hardness of the drill bit and we don’t want that. Every few seconds dip the tip of the drill bit into the water to cool it down. This way you won’t have any high spots.Īs you are grinding away, make sure to continually cool your drill bit using a small container of water. It’s important to have the trailing edge of the cutting angle lower than the front. Place the drill bit close to the grinding wheel at around a 45 deg angle and start to grind down the cutting angle.
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