Grant, let me just echo what John said about the use of a high speed grinder by posting a response I received from Bill Neddow who authored an article on CBN wheels in the AAW's American Woodturner...
Re: CBN Wheels
Harvey, 3600 is at the upper end of the speed for CBN wheels, but the specs I have seen indicate the wheels will handle it. Generally, the maximum speed seems to be around 4,000 rpm. I would be a lot more comfortable at 1600 rpm. At that speed, the wheels can remove metal quickly if you are not careful and put some pressure on the tool. That would be compounded by increased speed.