16 What are the methods and techniques for fitting keys and splines?

Fitting keys and splines typically involves several methods and techniques to ensure proper alignment and secure connections. Common methods include using keyways, where a key is inserted into a slot on both the shaft and hub, and splines, which are grooves cut into the mating surfaces that allow for torque transmission while accommodating axial movement. Precision machining, such as CNC milling, is often employed to create accurate profiles, and proper tolerances are critical to prevent slippage or wear. Additionally, tools like alignment fixtures and measuring gauges are used to ensure correct fitting during assembly.