![]() Lay the flat side of the file up against the flat of each tooth.Put a little bit of the lapping fluid on the flat side of the file.How to Properly Sharpen A Forstner Bit With A File You still have to use a file to get the actual cutters of the bit sharp though. This method is best used when you have continuous or wavy patterned forstner bits. The other method of getting forstner bits sharp is through the use of a dremel. You don’t need to buy an expensive forstner sharpening kit like I mentioned in the Forstner Sharpening Kit section of this article.Īn auger file will do just fine for these types of bits. The file method and a little lapping fluid is the way to go. If you plan on buying just the ones that have teeth then the method is very simple. What it all comes down to is what kind of forstner bit do you have or plan on buying? There isn’t a best method for sharpening forstner bits. Best Methods for Sharpening Forstner Bits Continuously keep moving the file around the inside of the guide rim.The rounded side will get the entire cutting edge sharp but the flat side won’t. If using a file, use the rounded or convex side of the file.Sharpening a continuous guide rim forstner bit is a bit different since they don’t have teeth but instead a wavy pattern: When filing across the cutting part of the bit you want to file at a diagonal motion so that the entire part of the plane is filed evenly.Don’t apply a whole lot of pressure, you don’t want to remove too much material.This ensures that all of the teeth engage the wood at the same time so that they can all work together. Only file the flat of each tooth and always count the number of back and forth strokes with a file so that each tooth gets exactly the same amount of attention.ĭon’t sharpen the sloping top surface of the teeth.When sharpening a forstner bit that has teeth: There’s just a couple of tips to help you with the sharpening process. This kit can also sharpen different types of woodworking bits such as router bits, small chisels, woodturning gouges and carbide inserts. A dvd also comes with the kit to show how everything works. They even threw in a non slip mat for the credit card shaped stone so it’s not sliding all over the place when you’re trying to sharpen your bits. The kit also comes with a cleaning block to keep your sharpening stone in good working order. On one side you have a 300 grit surface while on the other side is a 600 grit surface. A credit card sized sharpening stone which is double sided. The kit also comes with lapping fluid that’s used for lubrication when sharpening. This side is used to sharpen the wavy rim forstner bits. The other side of the file is rounded or concave. The file has a flat surface that’s used for sharpening forstner bits that have teeth. What’s included in the kit is a diamond file that’s 600 grit. There’s a pretty good sharpening kit called TREND DWS/KIT/C The Complete Diamond Credit Card Sharpening Kit. If you’re sharpening different types of forstner bits by hand, you’ll need a forstner sharpening kit that can sharpen different kinds of bits. It also helps protect the bits from surface rust when not in use. It’s safe to use while at the same time removing sap from the surface. Clean off all of the sap and debris left behind from use.Ī good product to use for cleaning forstner bits or any other woodworking bits is a tool cleaner called Trend CLEAN/500 Tool Cleaner Industrial Strength Wood and Resin Remover. No matter what kind of forstner bits you have and there are multiple ones, make sure that they are clean before starting the sharpening process. Also think of all the money that can be saved by learning this easy technique. You’ll save yourself time from making multiple strips to the store to buy new forstner bits. Besides, learning how to do it properly isn’t that difficult and it doesn’t take that much time. ![]() Sometimes the forstners that you buy aren’t really as sharp as they should be so you might as well learn how to use a file and or a credit card diamond stone. Plus the bigger the bit the more expensive they are. These boring bits can get pretty expensive, even the cheaper ones. I would encourage anybody that uses forstner bits to learn how to properly sharpen them. With a little bit of practice and patience you’ll find that it’s more beneficial to you to learn how to sharpen them yourself. There are two different ways of sharpening forstner bits which are discussed below. The good news is that they can be sharpened.
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