Spur gear, also known as straight-cut cylindrical gear, is a common type of gear transmission device. It forms a transmission system with two gears meshing with each other on parallel axes and is typically used to convert rotational motion into rotational motion, achieving speed reduction or torque increase.

The teeth of spur gears have a straight-line profile, making them the simplest and most common form of gears compared to other gear types. Spur gears can be classified into driving gears and driven gears, where the driving gear engages with the teeth of the driven gear, causing it to rotate accordingly.

Key features of spur gears include:

Simple structure: Spur gears have a relatively straightforward design and manufacturing process, making them easy to machine and assemble.

Versatility: Spur gears are applicable in various mechanical transmissions, such as automotive, industrial machinery, elevators, machine tools, wind power generation, and more.