What can I do with a surface grinder? | The Hobby-Machinist
A surface grinder makes an excellent cut-off tool for cutting hardened shafting. If you have a planer or jointer, you can sharpen the knives on a surface grinder. If you have a sheet metal punch, you can sharpen the punches and dies on a surface grinder. A surface grinder will allow you to make your own parallels any height or thickness desired.