Sanding machine with water sprayers for metal surfaces subject to heat deformation. Equipped with a full and rigid feeding bench with super-grip carpet for perfect adherence of the pieces during processing. Bench movement by handwheel with thickness display with fine adjustment. Double feed speed up to 10 m / min. Group for drying pieces on exit. Configuration with up to two operating groups. Equipped with steel tank for water collection, with cloth paper filter for sludge separation.