DESIGN OF SHAFT BASED ON RIGIDITY AND Durability CALCULATION AND Position OF TWIST Design of Shaft: A shaft is a spinning member usually of circular crossection (stable or hollow), which is utilized to transmit vitality and rotational movement. Axles are non rotating member. Elements such as gears, pulleys (sheaves), flywheels, clutches, and sprockets are mounted on the shaft and are being used to transmit electricity from the traveling device(motor or engine unit) by having a machine. The rotational push (torque) is transmitted to these elements on the shaft by press fit, keys, dowel, pins. The shaft rotates on rolling contact or bush bearings. Numerous kinds of retaining wedding rings, thrust bearings, grooves and steps in the shaft are being used to take up axial tons and discover the rotating elements.