Methods and techniques of fitting keys and splines?

Fitting keys and splines involves precise machining and alignment to ensure proper engagement and load transfer between components. Common methods include using keyways cut into shafts and hubs for keys, and utilizing broaching or milling techniques for splines. Proper tolerancing is critical, often following standards like ISO or ANSI, to ensure a snug fit and prevent movement. Additionally, assembly may involve lubrication or surface treatments to facilitate easier installation and reduce wear.