What is the function of a crown gear?

[LaMaximus]

The function of a crown gear is: It can not only mesh with other crown gears in a set, but also engage with bevel gears, spur gears, or worms. When deceleration is needed, meshing with a spur gear that has fewer teeth (such as an 8-tooth gear) can achieve a larger reduction ratio, with the spur gear acting as the driving gear. It can even replace a 24-tooth spur cylindrical gear when parts are in short supply. Crown gears, also known as face gears, have teeth distributed on the end face and are commonly used in mechanical transmissions, reversing clutches, etc. Their advantages include small size, compact structure, and the ability to transmit large torque. Crown gears are a unique type of gear in LEGO components, typically featuring 24 teeth.