Helical Gear Speed Reducers
Provide high-efficiency speed reduction through 1, 2, 3, or 4 sets of gears. Electric power is usually transmitted from a large-acceleration pinion to a slower-speed equipment. Helical gears generally operate with their shafts parallel to each other. The two most common types will be the concentric (insight 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 reduced speeds and higher ratios are required, double, triple, and quadruple gear reduction stages can be used.
Worm Gear Speed Reducers
A single reduction velocity reducer can achieve up to a 100:1 
decrease ratio in a little package. Known 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 1 tooth for every 360-degree turn of the worm. Therefore, regardless of the worm’s size, the gear ratio may be the ‘size of the worm gear to 1′. Higher reduction ratios can 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. As a result, torque output will be the inverse of the function. If the enclosed get is a quickness reducer, the torque result will increase; if the travel raises speed, the torque output will reduce. Gear drive selection factors include: shaft orientation, quickness ratio, design type, character of load, gear rating, environment, mounting position, operating temperature assortment, and lubrication.
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