... , established in 2003, with about 9 years' experince in belt conveyors, conveyor idler rollers, conveyor rollers, roller support design and ... : We usually use 35° trough idler. Rollers: Light, middle, heavy types. Φ 500~1000mm. Diameters of the bearing changable.Purface of ... inverted trough, a funnel and so on)Special services for belt conveyors 1. Tools for fixing, bolts, screw nut, spare parts ...