PARALLEL SHAFT HELICAL GEAR BOX  A parallel shaft helical gearbox is a type of gearbox that uses helical gears to transmit torque and reduce the speed of a rotating input shaft to a slower output shaft. In this design, the input shaft and output shaft are parallel to each other, hence the name "parallel shaft." Parallel shaft helical gearboxes are known for their high efficiency, reliability, and durability. They are commonly used in a wide range of applications, such as pumps, fans, blowers, and conveyors. They are also suitable for high-speed applications, as the helical gears provide smooth and quiet operation.