Helical bevel gears are types of gears commonly used in mechanical engineering applications. They are designed with curved teeth that are twisted along the gear's surface, allowing for a smooth and efficient transfer of power between intersecting shafts at various angles. The helical bevel gear design helps to reduce noise and vibration while providing higher gear ratios and increased load capacity compared to other types of gears. These gears are widely used in industries such as automotive, aerospace, and manufacturing for applications that require precise and reliable torque transmission. In mechanical engineering, helical bevel gears play a crucial role in optimizing the performance and efficiency of power transmission systems.