If you have an internal combustion engine that actually runs, then your camshafts are spinning twice as fast as your crankshaft. Change the rate at which either of the two spins in relation to one ...

Over-tensioning shortens not only the life of V-belts but also that of the sheaves, electric motor, and driven equipment bearings. In extreme cases, it can even bend or break a motor shaft.

Working as a General Motors and ASE Master Technician, teaching automotive technology and being involved in the auto repair industry for over 50 years, I saw how two, three or more “V”-drive belts ...