A helical gear is 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. Helical gears can transmit power between parallel or non-parallel shafts, making them versatile in various mechanical applications. These gears are commonly used in machinery, such as automobiles, industrial equipment, and gearboxes. The angled teeth engage gradually, which reduces stress and wear, leading to increased efficiency and longevity. Helical gears are essential components in many systems that require reliable power transmission.