Gear

In general, a gear is a mechanical component that transmits motion and power between two rotating shafts, and it is designed to mesh with another gear to transmit torque and motion. Gears come in various sizes, shapes, and designs, but they all have the same basic function. Gears are classified based on their geometry, tooth profile, and application. Some common types of gears include spur gears, bevel gears, helical gears, worm gears, and planetary gears. Each type of gear has its own specific applications and advantages.