What size buffer wheels

[eddy79]

I have done my reading on the subject and picked up a small bench grinder with approx 1/3 horsepower motor that runs at approx 3000 rpm. I know that I will need to run 4 inch wheels to keep the sfpm to the range I want and will pick up a 2 inch for plastics etc when I really want to slow it down.

My questions are after all the reading no one mentions what thickness the wheels that they run and I prefer 5/8 hollow ground razors and are 4 inch wheels going to be good for this size razor or would 3 inch be better.

I know the pitfalls of grinders and will be getting an extension to go on before the tapered spindle and by raising the grinder slightly also should have plenty of room. Thanks for your help. Ed