Plywood Sanding Machine

sander, portable power tool used for smoothing, polishing, or cleaning a surface, as of wood, plastic, or metal. Sanders are also used to roughen surfaces in preparation for finishing. There are three main types of power sanders: the disk sander, the belt sander, and the orbital sander.Both orbital sanders and sheet sanders move an abrasive in a circular pattern. However, while a sheet sander uses sheets of sandpaper as the abrasive, an orbital sander uses special sanding discs. These discs come in multiple grits, and they tend to cost more than regular sandpaper.