A basic two-stage spur gearbox typically includes essential components such as gears, shafts, bearings, and a housing. The gears are responsible for transmitting power, while the shafts support the gears and facilitate rotation. Bearings reduce friction and support the shafts, ensuring smooth operation. The housing encloses and protects the internal components, maintaining alignment and stability. Understanding these components is crucial for anyone looking to work with or design a two-stage spur gearbox.