The HM410 tracking idler is an excellent solution to prevent the return belt from shifting sideways. This tracking idler is designed to start centering the return belt immediately when the slightest center deviation appears. The centralizing effect is achieved by a special bearing unit inside the roller which simultaneously tilts and turns. The range of tracking idler range consist of two diameters, 159mm and 219mm and standard rollers are with 5mm rubber lagging.