Helical Gear Speed Reducers
Provide high-efficiency speed reduction through 1, 2, 3, or 4 sets of gears. Electric power is definitely transmitted from a great-speed pinion to a slower-speed gear. Helical gears usually operate with their shafts parallel to one another. The two most common types will be the concentric (input and result shafts are in line) and parallel shaft (input and output shafts are offset). Single-stage helical gear reducers are usually used for equipment ratios up to about 8:1. Where cheaper speeds and more significant ratios are required, dual, triple, and quadruple equipment reduction stages may be used.
Worm Gear Speed Reducers
A single reduction velocity reducer can achieve up to 100:1 reduction ratio in a little package. Referred to as right angle drives, these consist of a cylindrical worm with screw threads and a worm. With an individual start worm, the worm equipment advances only one tooth for each 360-degree convert of the worm. Thus, whatever 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 reduction ratios.
Basic Types of 
Gearboxes
The objective of a gearbox is to improve or reduce speed. Because of this, torque output would be the inverse of the function. If the enclosed drive is a velocity reducer, the torque output will increase; if the travel improves speed, the torque result will decrease. Gear drive selection factors include: shaft orientation, speed ratio, design type, nature of load, gear rating, environment, mounting position, operating temperature collection, and lubrication.
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