How to sharpen an auger bit with a file?

29th February 2020


	How to sharpen an auger bit with a file


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			For this task, you will need your auger bit file at the ready!

			Auger bits are specific tools used for drilling wood. Two parts of the bit should be kept sharp: the spurs and the cutting edges, as seen in the diagram to the left.

			They work by engaging with the wood with a lead screw, which keeps the bit drilling in a straight line.

			Sharp spurs then trace out a circle in the wood defining the edges of the hole as they drill downwards.

			Next, cutting edges act as chisels to remove chips of wood and send them travelling up the spiral body of the drill bit.

			Some auger bits only have one cutting edge, but they work in exactly the same way.

			Step 1 – Sharpen cutting edges Using the cross filing technique, sharpen all cutting edges on your tool by giving them several strokes with your auger bit file.

			Step 2 – Sharpen insides of spurs Using the same technique, file inside the spurs.

			It’s important that you don’t file outside the spurs, as doing so will wear away material on the edge of the drill bit and reduce the size of hole that it will drill.

			Step 3 – Test it out Your auger bit should now be sharp. You can test it by drilling a hole in some scrap wood.