Lecture No 30 Belt Drives NPTEL
Nomenclature of Open Belt Drive d L Diameter of the larger pulley α d S – Diameter of the smaller pulley α L Angle of wrap of the larger pulley α S – Angle of wrap of the smaller pulley L C Center distance between the two pulleys Basic Formulae α L = 180 ο + 2β α S = 180 ο 2β Where angle β is, L 0 = Length of open belt This formulae may be verified by simple geometry.