I need to make 3/16" mortises for a project. I have 1/8" and several 1/4" chisels. I'm thinking of making one of the spare 1/4" chisels into a 3/16". Seems like taking 1/32" off each side should not be too hard. I'd get close on the grinder and finish off with a file and maybe even a few rubs on a coarse diamond stone.
Other than overheating the steel, is there anything else I need to be aware of?