Anyone know how to sharpen an Auger?

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Jan 21, 2008
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i got an auger at an antique store today for $13 but it wont drill very well, so i would assume that it need a sharpening. any advice?
 
there are two possible sources of problem here:

the spur, if screw-type, is dull so it won't pull the auger into the wood

the blades of the auger are dull.

i would suggest getting a needle file and having at the blades from the inside edges. get out any nicks and finish with the finest grit stone you can fit in there. lightly dress the outsides of the edges, but you don't want to make the hole size smaller. do what you can to remove the burr with light strokes.

if the spur is damaged, you can try using a knife-edge needle file to recut the threads, or you could shape it into a spike point, meaning you will have to press down much harder vs just turning it and letting it do its own work.

augers are really neat tools, i use auger bits with my brace for alot of rough woodworking jobs (building benches and other basic things)
 
There is a file made for sharpening auger bits.


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Usually one end has teeth only on the face with shooth edges and the other end has teeth on the edges and smooth faces. I've used one to bring back an auger that was damaged by trying to drill through screws...
 
if all else fails, file the screw into a Forstner bit style tip. You will have to press harder to get the auger to "bite"
 
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