Hi Everyone,
I very recently converted my bench grinder to CBN wheels. I bought a 180 grit and a 600 grit. I also have an 80 grit that I have not mounted yet. I have a couple of questions I was hoping some of you seasoned vets may be able to help with.
1. I was under the impression that you could not burn the edge/take the temper on these CBN wheels. Anyone want to buy a new Lee Nielsen bevel edge chisel with a burnt edge? I guess that is my first question - is the burnt edge actually an indication of a loss of temper, or am I over-reacting on that? It happened almost immediately while changing the bevel on a 1/2" chisel. It was on the 600 wheel - I saw no issues at all with the 180 grit, but I burned the chisel on the 600 grit wheel pretty quickly. I am guessing that the higher grit = more friction = heat.
2. My grinder is the ubiquitous Delta GR450 8" variable speed 1750 RPM grinder. I would like a heads up about the speed control, especially with these CBN wheels. Is there a better or recommended speed to use when grinding bench tools (chisels, plane blades, carving tools, etc)? I'd also appreciate anyone with a an idea or pics of a jig for using with chisels and plane blades to ensure a square bevel? I have the Wolverine rests on my stand.
Any feedback will be much appreciated.
Joe