Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 models 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 (insight and output shafts are offset). Single-stage helical gear reducers are usually used for gear ratios up to about 8:1. Where cheaper speeds and higher ratios are required, double, triple, and quadruple gear reduction stages can be used.
Worm Gear Speed Reducers
A single reduction rate reducer can achieve up to 100:1 reduction ratio in a small package. Referred to as right angle drives, these consist of a cylindrical worm with screw threads and a worm. With a single begin worm, the worm gear advances only 1 tooth for each 360-degree switch of the worm. So, regardless of the worm’s size, the apparatus ratio may be the ‘size of the worm gear to 1′. Higher decrease ratios could be created through the use of double and triple decrease ratios.
Basic Types of Gearboxes
The objective of a gearbox is to right angle worm gearbox improve or reduce speed. Consequently, torque output will be the inverse of the function. If the enclosed drive is usually a rate reducer, the torque output will increase; if the drive 
improves speed, the torque output will decrease. Gear drive selection elements include: shaft orientation, speed ratio, design type, character of load, gear rating, environment, mounting position, operating temperature range, and lubrication.