Abstract
Helical synchronous belts have been developed in order to reduce the noise that occurs when conventional timing belts are driven. However side tracking in helical drives due to the helical shape of the tooth trace is more problematic than in conventional drives. In the present study, method for reducing side tracking in helical synchronous belt by adjusting pitch difference under torque was investigated experimentally. It is found that side tracking can be reduced when the pitch difference is adjusted as both axial forces at beginning of meshing on the driving and the driven pulleys act in opposite directions and are equal.
