A grinder is a vary versatile tool that can grind, shape, polish and cut through metal and concrete. There are bench grinders, die grinders, straight grinders and right angle grinders. This is a tool that you will not pull out everyday, but when you need it a grinder can be a great power tool.
A grinder is a portable power tool that is held in your hand. This tool drives a motor that in return spins a wheel on the end of the tool. The wheel can be anywhere from 4″ to 9″. The motor that is doing the work will be anywhere from 4 amps to 15 amps. The more the amps, the greater the power and the less the tool will slow down. The wheel will spin anywhere from 4000 revolutions per minute or RPM to 1100 RPM.
Some of the grinders will have variable speed, depending upon which brand you buy. If you are using a variable speed, low speeds are better for polishing, while higher speeds are better for grinding and cutting.
Professional Power Tool Manufacture of Grinders and Ratings – See the rating guide
Grinding Wheels – There are many types of grinding wheels on the market. Make sure you have the right wheel for the job you are performing.
Cut off wheel – Cuts metals such as rebar
Grinding Wheel – Cutting Metal, Wood, Shaping or Sharpening hand tools, blades, bits or cutters
Diamond Wheel – Cuts concrete, block and stone
Wire Brush – This is used to remove rust and some polishing