Tools · Bench Grinders
Is a slow-speed grinder better for sharpening tools?
Reviewer consensus
Reviewers focused on sharpening chisels, plane irons, and turning tools strongly favor low-speed (around 1,750 RPM) grinders because they generate less heat and reduce the risk of bluing an edge. Forum posters in r/handtools repeatedly recommend 8-inch low-speed units such as the BUCKTOOL TDS-200C4HL for this exact reason. High-speed grinders are fine for rough metal removal but demand a more careful touch.