Most of us who have ever walked past a construction site will have heard the high pitched scream of an angle grinder, however there are actually three main types of grinder available. Angle grinders are the most popular type available and are used for many different uses including cutting slots into brickwork, concrete, cutting paving slabs and grinding down and cutting metal rods and metal sheet. The majority are corded electric, however you can also now find smaller cordless models as well as specialist air powered models. The discs are removable and different discs are available for working with different materials.
Bench grinders are workshop tools which are fixed securely in place on a workbench. They normally have two spinning abrasive discs (with different coarseness) and are used for activities like sharpening tool blades as well as detail work on wood, metal and plastic items.