Sharpening router bitsI was routing some tracks for a marble game experiment and was getting messy cuts and some burning. I figured, the router bit is probably getting too dull.
I also tried a diamond stone one time, but that was slow and tedious.
A reader, Andrew Scott, had suggested using a Dremel tool with a diamond wheel to sharpen carbide saw blades. Dremel tool diamond wheels are relatively cheap. I tried it, and it seemed to work. The diamond wheel was just fine enough for sharpening.
I first sharpened just the flat part of the cutter, and it cut much better after that.
Later, I accidentally routed into a screw in my jig, so I sharpened again, this time sharpening the outside edge as well. Although for round-over bits and other bits with inside curves, a wheel really wouldn't work that well.
I have since been told that dust from sharpening carbide is hazardous to your health, so I'd recommend doing this outside on a windy day. Though I suspect, as a hobbyist, only sharpening the occasional bit, the dust exposure is still less than in it would be for someone sharpening blades professionally, even with protective equipment.
You can see some lines along the grooves in the track pieces at right. Those are from pre-routing a square channel to make less work for the ball nose bit, but I routed some of those too deep.
More sharpening articles:
with an angle grinder
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