Gyros Make 'Parallel Shaft Helical Gear Box' A Parallel Shaft Helical Gearbox is a type of gear reducer that uses helical gears with parallel shafts to transmit power. It provides smooth, quiet operation and high efficiency, making it suitable for various industrial applications. The helical gears allow for larger contact ratios, resulting in increased load-carrying capacity and reduced wear. These gearboxes are commonly used in conveyor systems, mixers, and other machinery requiring reliable power transmission.