Bench Grinder Basics You Need to Know — The Family Handyman
Oct 02, 2018 · Consider a LowSpeed 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 tip), these highspeed grinders work fine. But for sharpening, a lowspeed grinder running at 1,750 rpm is a better choice.