Bevel and spur gear

Bevel gear is a type of gear that has teeth set at an angle to the axis of rotation of the gear. It is often used in mechanisms where it's important to transfer drive between two axes that are not parallel.

Spur gear is a type of gear in which the teeth are set parallel to the axis of rotation of the gear. It is one of the most common types of gears and is used in various applications such as in gearboxes, drive systems, and other machinery.