Troughed belt conveyors are where the belt forms a trough on the conveying side while running on idler rollers in 5-, 3- or 2-roller groups. The groove angles used are: 15°, 20°, 25°, 30°, 35°, 40°, 45°. Trough belt conveyors are designed to help keep loose or bulk materials in the center of the conveyor. Belts come with rollers, guides ...Web