Crowned Pulleys — Which Option is Right for You? | Sparks ...- conveyor belts face ,Most often, conveyor systems that use a v-guide on the back surface of the belt are manufactured with straight face pulleys.There is not a need for pulleys to be crowned or tapered when a v-guide is used.Chains - MAY CONVEYORMay Conveyor provides chains for conveyor belting in many assorted sizes and styles.