Reply to thread

Message: <blockquote data-quote="6brnorma" data-source="post: 97308" data-attributes="member: 5914">Both the Variable & the Driven sheave have perfectly straight faces when new but after many hours of use there is a curve worn in them by the belt, effectively reducing belt contact in low speed. I have a drawer full of the caps (pt#6504428) for the end of the variable speed root-swivel assembly. There is nearly a .500 difference between the thinnest and the thickest which could equate to the same numbers on the belt. A couple of reasons for a loose belt but, again, simply bumping up the variable speed sheave will still give you low speed.The wear you describe is normal only if you put thousands of hours on the machine. We use our machines commercially and I can't remember the last belt that had to be replaced due to "normal" wear. Early belt failure is typically due to sheave/belt mis-alignment, disfigurement of sheave face, excessive spring tension or worn bushings in the driven sheave. How many hours of use do you suppose you got out of the other two belts?</blockquote>