Bench Grinder Basics You Need to Know — The Family Handyman
Mar 20, 2019018332Unless 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. The lower speed reduces the chance you’ll overheat the edge of your tool.