I was researching on how to sharpen the blades off my Ion auger. One guy used a Work Sharp knife sharpener, he pulled the blade guide off and just ran the blades across the belt very lightly following the angle of the Ion blades.
I gave it a try with worn out medium grit belt, work great. If I had someone local to sharpen them I would have brought them in.
I did buy some new blades in case I messed it up. I compared the new blade to the ones I sharpened and drilled some holes with both. The ones I sharpened were very close to the new ones.
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