That exact method you’ll need to follow will vary for different types of drill bit. You can apply a polish to get most of the same friction-reduction and the coating is minimally effective at anything but delaying rust in the first place. Oxide coatings, the black stuff, are the only coating I’d recommend re-sharpening. Enjoy the lifespan of your titanium drill bits and just buy another set when they’re too dull to be of use. In all cases, you’re going to lose the coating by sharpening the bit. CoatingĬoatings are a complicated matter, at least when it comes time to sharpen. A standard hardened steel file is too soft to re-edge the blades on the bit, so diamond tools or a professional are required. Their extra hardness makes them impractical to sharpen at home. In some cases, you may want to purchase another set entirely.Ĭobalt and tungsten alloys are commonly used for hardened steel or masonry. It’s quite hard but doesn’t require exotic materials to work with.Ĭheaper steel is even easier, but the time investment in sharpening them is intensive. HSS is a great material, designed for drill bits and other tools which are subject to high RPM loads. Most drill bits are made of some form of high-speed steel. The following can all keep you from sharpening the drill bit in question. More often, it has to do with the mechanical properties of the bit’s material. Diamond bits, for instance, rely on an abrasive to cut and the diamonds will “burn” as time goes on. Sometimes this is due to the type of bit, primarily when we’re talking about specialty bits. There are dozens of different variations of drill bits, and not all of them are serviceable at home. While some other types can be re-used, it’s often not economical. Provided you can work the base material of the bit with your tools, you should be able to sharpen all of these at home. Hole Saw- Hole saws are often used in drills, but aren’t really a “bit.” They can often be resharpened a couple of times if you’re willing to put in the work.Forstner drill bits- These complex bits can be resharpened if you want to extend the life of a good set.They have few parts and can be back in action quickly. Spade drill bits- Easily sharpened with just a file.Usually, you’ll only have to adjust the head on one which has been heavily used.
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