When axial movement between the sha

When axial movement between the shaft and hub is required, relative rotation is prevented by means of splines machined on the shaft and into the hub(see Fig.4.6).There are two forms of splines: straight-sided splines and involute splines. The former is relatively simple and Threaded fasteners perform the function of locating, clamping, adjusting, and transmitting force from one machine member to another. They are thoroughly standardized and generally designed for use in mass production of machines. The use of threaded fasteners(see Fig. 5.1)remains the basic assembly method in the design and construction of machines (despite advances in other methods of joining). Thus the designers must select standard fasteners of the type and size (that will most adequately suit the application at hand).