... established in 2003, with about 10 years' experince in belt conveyors, conveyor idler rollers, conveyor rollers, roller frame design ... , heavy types. DIameter D=500~1000mm. Diameters of the bearing changable.Purface of the rollers: Smooth, Rubber coated. Painting: ... paintings.Absolutly rust-resistant.Mterials: Carbon steel, Q235. Rubber belt. Belt materials(4 kinds): Canvus(56N/mm.layer), nylon(100 ...