Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 pieces of gears. Power is transmitted from a high-acceleration 
pinion to a slower-speed equipment. Helical gears generally operate with their shafts parallel to one another. The two most common types are the concentric (input and output shafts are in collection) and parallel shaft (input and output shafts are offset). Single-stage helical gear reducers are right angle worm gearbox usually used for gear ratios up to about 8:1. Where lower speeds and higher ratios are required, double, triple, and quadruple gear reduction stages can be used.
Worm Gear Speed Reducers
A single reduction acceleration reducer can achieve up to a 100:1 reduction ratio in a small package. Referred to as right position drives, these contain a cylindrical worm with screw threads and a worm. With an individual start worm, the worm gear advances only one tooth for each 360-degree switch of the worm. So, whatever the worm’s size, the gear ratio may be the ‘size of the worm equipment to 1′. Higher decrease ratios could be created through the use of double and triple decrease ratios.
Basic Types of Gearboxes
The purpose of a gearbox is to increase or reduce speed. Because of this, torque output would be the inverse of the function. If the enclosed drive can be a swiftness reducer, the torque result increase; if the drive boosts speed, the torque output will reduce. Gear drive selection factors include: shaft orientation, rate ratio, design type, nature of load, gear ranking, environment, mounting position, working temperature range, and lubrication.