A sander used for shaping and finishing wood and other materials is a belt sander or strip sander. A pair of drums with an endless loop of sandpaper mounted on them are turned by an electric motor. Belt sanders can be portable and moved over the material, or they can be fixed and stationary, moving the material to the sanding belt. When stationary belt sanders are mounted on a workbench, they are known as bench sanders. Disc sanders are frequently used in conjunction with stationary belt sanders. Belt sanders are typically only used at the beginning of the sanding process or to quickly remove material because they can have a very aggressive action on wood. They are occasionally also employed to take paint or other finishes off of wood. A belt sander fitted with fine-grit sand paper can be used to produce an entirely smooth surface.
Types of sanding belts and their uses
The long and wide abrasive belts are ideal for edge sanders. They are considered as such when they exceed 3,001 mm in length. Its applications can be exploited on veneered surfaces, on plywood, and hard and softwoods. They can be used in all sanding methods, such as finishing or sizing.
The short belts have a belt length from 690 mm to 3,000 mm. Highly refractory materials and stainless steel (INOX) can be used for sanding, as well as for aggressive sanding with maximum starting capacity on hard materials that are poorly conductive of heat.
These types of belts have many uses; It can be used for the intermediate sanding of industrial lacquer systems, for the rectification of lacquer defects, for the rectification and tinting of primers or to section the vertical pile of the wood. It is also useful in intermediate sanding of thin layers of varnish or, with finer grains, for use on oily surfaces, treating high-gloss varnishes, rectifying lacquer defects and preparing for polishing on high-gloss surfaces.
Wide belts are those that even go up to 1500 mm wide. They are used predominantly in the wood industry, for the removal of varnish defects, intermediate sanding in industrial varnish systems and sanding of high wood fibers, as well as for the grinding and shading of primers, intermediate sanding of thin layers of varnish and the final sanding to prepare the polish, among others.