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Belt sanders can vary in size from the small handheld unit shown in the illustration to units wide enough to sand a full 1.2 by 2.5 m (4-by-8 foot sheet) of plywood in a manufacturing plant. Some belt sanders can be as large as 1.2 by 0.7 metres (3 ft 11 in × 2 ft 4 in).
Wide-belt sander: A large sander similar in concept to a planer, but much larger. Uses a large sanding belt head instead of a planer's shaping head, and requires air from a separate source to tension the belt. For rough sanding large surfaces or finishing. Used mainly for manufacturing furniture and cabinets.
In woodworking, wide belt sanders use platens to press the sanding paper into contact with the wood being sanded. The platen sits between two steel rolls which deliver the moving force to the sanding belt.
The belt sander was invented by Eugen Laegler in 1969 out of Güglingen, Germany. 90% of the area can be reached with the belt/drum sander. The remaining 10% left such as edges, corners, under cabinets, and stairs, are sanded by an edge sanding machine. A rotary machine known as a multi disc sander or buffer is then used for the final sanding ...
Furthermore, a wide belt grinding machine can be constructed with single or multiple heads. The first head is used for coarse grinding and the next heads gradually make a finer finish. Wide belt grinding is also used as a high stock removal method for special metals (e.g. stainless steel , titanium , and nickel alloys).
Shapers feature between 1.5 and 5 horsepower (1.1 and 3.7 kW) belt-driven motors, which run much more quietly and smoothly than typically 10,000 to 25,000 rpm direct-drive routers. Speed adjustments are typically made by relocating the belts on a stepped pulley system, much like that on a drill press. Unlike routers, shapers are also able to ...