Trough idler is one of the key components of belt conveyor, which is mainly used for roadway transportation. It is one of the most widely used models at present, with high aesthetics, long service life, low rotation resistance and high bearing capacity. It is widely used in the environment with large dust and high corrosivity in the open air, such as mines, power plants, steel plants, stone plants, cement plants, coal washing plants, salt plants, alkali plants, chemical fertilizer plants, wharfs and all other transport sites.