Use a grinding wheel or a flap disc by holding the grinder at a 15- to 30-degree angle relative to the material you are grinding. When cutting, hold the grinder vertically relative to the surface.

For a Delta grinder with a 6-in.-diameter wheel, a 5-1/2-in.-long piece of 2×4 aligns the tool to the wheel just right. For other bench grinders, you may need to adjust this length.

After donning the appropriate safety gear, start the grinder and drive it to within 3 feet of the stump. Use the hydraulic lever to raise the cutting wheel until it’s a few inches above the stump.

Most grinding wheels are one of eight basic types that are variations of straight and cup wheels. The variations come from different wheel features, such as reliefs and recesses, which make them ...