Patented torsion-spring precleaner, in which each blade bounces away from the belt for splice passage and quickly returns to the cleaning position. The torsion-spring precleaner is a reliable solution for effectively removing bulk material carryback while protecting the belt and its splices. Moreover, the patented blade can self-adjust and maintain blade-to-belt contact via a torsion element. Carryback adheres to the belt, which causes serious material accumulation and residue build-up on return rollers. Therefore, belt mistracking or belt-edge damage results in unscheduled downtime. Depending on application, three materials of blades are available: PU, tungsten carbide and nano, which thoroughly scrape conveyor belts clean at the head pulley and eliminate problems with carryback and spillage. Models: PRUS/PRNS/PRTS/PRHS.