Helical gears are a type of gear with teeth that are cut at an angle to the axis of rotation. This design allows for smoother and quieter operation compared to straight-cut gears. The angled teeth engage gradually, which helps distribute the load more evenly and reduces wear. These gears are commonly used in various applications, including automobiles, industrial machinery, and elevators. Their ability to handle higher loads and provide efficient power transmission makes them a popular choice in many mechanical systems.