Consider a Low-Speed Grinder for Sharpening. Unless they’re variable speed, most bench grinders run at about 3,450 rpm. If you’re careful and keep the wheel dressed (more on that in another ...

Meanwhile, the JBG-6A 6-inch bench grinder from Jet operates at ½ hp, and the 6-inch bench grinder from DeWalt — the best-selling tool brand in the United States — operates even higher at ⅝ hp.