Timing Belts Catalogue

138 Timing belt trackingTiming belt trackingTo ensure smooth operation, the tracking of timing belts is critical. The additional means to track timingbelts (below), assumes that pulleys are aligned in accordance with the recommendations in the chapter„installation“.1) FlangesFlanges are a common means for tracking timingbelts. They are attached to the sides of at least onepulley and prevent the belt from tracking off.2) Vee-guidesTiming belts are often equipped with a Vee-guideon the toothed side. This requires pulleys with acorresponding profile (slider beds also must be profiledaccordingly). However, the active tooth widthis reduced by the width of the Vee-guide. This mustbe taken into account at the design stage.Timing belt trackingAt small centre-centre distances it is possible to useonly a single flange on each pulley (on oppositesides!).Different kinds of Vee-guides can be found in thecorresponding chapter of this catalogue.Flanges should be attached to the bigger pulley,but for reasons of cost in most cases the smallerpulley is equipped with flanges. Drives with largecentre-centre distancesw should have flanges on allpulleys.Timing belt tracking with a flanged tension pulley, isalso possible.Copyright © Ammeraal Beltech 2006In some conveying applications, the flanges may interferewith the product. This should be consideredand if necessary, an alternative method of trackingshould be employed.