A belt conveyor system including an elongate housing having at least one troughing idler assembly disposed therein. The troughing idler assembly includes a center medial roller and a plurality of side rollers. Each of the rollers includes a shaft having ends supported by at least one bearing having a first face and a second face. The bearings supporting the side rollers are mounted to an exterior of the elongate housing in such a manner that the first face and the second face of at least one of the bearings are visible.