Helical Gear Speed Reducers
Provide high-efficiency speed reduction through 1, 2, 3, or 4 pieces of gears. Power is certainly transmitted from a high-acceleration pinion to a slower-speed equipment. Helical gears usually operate with their shafts parallel to each other. Both most common types are the concentric (input and output shafts are in collection) and parallel shaft (insight and output shafts are offset). Single-stage helical equipment reducers are usually used for equipment ratios up to about 8:1. Where lower speeds and higher ratios are necessary, 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 little package. Referred to as right angle 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 every 360-degree switch of the worm. So, regardless of the worm’s size, the gear ratio 
is the ‘size of the worm gear to 1′. Higher reduction ratios could be created by using double and triple decrease ratios.
Basic Types of Gearboxes
The right angle worm gearbox objective of a gearbox is to increase or reduce speed. Consequently, torque output would be the inverse of the function. If the enclosed drive is definitely a swiftness reducer, the torque output increase; if the drive increases speed, the torque output will decrease. Gear drive selection factors include: shaft orientation, speed ratio, design type, nature of load, gear rating, environment, mounting position, working temperature range, and lubrication.