Definition
A spur gear is a type of gear with straight teeth that run parallel to its axis. Imagine two flat discs with teeth around their edges meshing together. They are one of the simplest and most common types of gears, used to transmit rotary motion between parallel shafts. Unlike helical gears, spur gears are known for their straightforward design and ease of manufacture. They are efficient at moderate speeds, but can be noisy at high speeds due to the sudden engagement of teeth. Spur gears are found in various applications, from clocks to car transmissions.