? These are double-col spring-loaded pulleys comprising of two
facing cone shaped discs each sliding laterally on the sleeves.Both
havlves of the pulleys move ensuring perfect alignment and
prevention of undue wear on variable speed belts.Variable speed is
obtained by varying the centre distance between the two pulleys and
modifying the position of the belts in the variable speed
pulleys.These drives are used in packing machines textile
machines,machine tools,printing machine