Follow the lead of the guys in machine shops and use Silicone Carbide bench grinder wheels
by KEITH BERGLIND
Carbide bits and tools can be a bit of an annoyance for most of us ordinary home shop guys. Most of the time, when you try to sharpen a saw blade or lathe tool bit on the regular grindstone, it turns out badly or remains dull.
Regular grinder wheels just don’t work. Many lathe bits get thrown to the back of the tool box: dull and useless. I have exchanged more than one table-saw blade because the blade had chewed its way through one-too-many nails.