Flankenoffene, formgezahnte Keilriemen The producing method for the open-edged, formed V-belts differs from that of the jacketed V-belts; these square measure belts with internal splines. The teeth facilitate to cut back the bending stress of the belt and permit it to work on abundant smaller diameter pulleys.The increase in potency over the shrouded V-belts considerably reduces the necessity for multi-belt drives. Open-edged V-belts need a better tension than jacketed V-belts so that they attain higher power transmission.