Lessening the chance of burning your tools
Synopsis: Mark White teaches woodworking, and here he explains how he designed a sharpening system that turns slower than 300 rpm. This way, he reduces the risk of friction-caused heat drawing the temper of his tools. The horizontal wheel allows flat grinding rather than hollow, and he says you can use a conventional grindstone or a flat wooden plate covered with an abrasive disc. He uses a crowned wooden disc covered with leather and charged with an abrasive compound for stropping. In this succinct article, he explains how he built the system and how to use it.
To reduce the risk of friction-caused heat drawing the temper of my tools, I designed a simple-to-make sharpening system that incorporates a vertical shaft turning slower than 300 RPM. The horizontal wheel, which allows flat grinding rather than hollow, may be a conventional grindstone or a flat wooden plate covered with an abrasive disc.…