Grinders; grinding is used in many manufacturing processes to produce a fine surface finish on an object and to bring the size of an object to within very fine tolerances.  A grinding machine has devices that hold an unfinished object and move it past the machine’s abrasive wheel or belt, which is driven by a motor.  For less exacting work, such as sharpening cutting tools, objects can be hand held and ground by a machine consisting mainly of an abrasive wheel or belt.

Belt Sander; a machine used to sand metal and other materials for finishing purposes.  It is consists of an electric motor that turns a pair of drums on which a seamless loop of sandpaper mounted.  Belt sanders are often used for removing non-ferrous metals, such as aluminum.  Non-ferrous metals tend to clog grinding wheels, quickly making them useless for grinding soft metals, while belt sanders continue to grind without clogging.

Disc Sander; A disc sander is most commonly known as a stationary machine that consists of a replaceable circular shaped sandpaper attached to a wheel being electrically spun around.  The work piece is supported on a front table that can be adjusted to various angles.  It can be used for rough or fine sanding depending on the sanding grit used.