Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 units of gears. Power is usually transmitted from a high-swiftness right angle worm gearbox pinion to a slower-speed gear. Helical gears usually operate with their shafts parallel to one another. Both most common types are the concentric (insight and output shafts are in line) and parallel shaft (insight and result shafts are offset). Single-stage helical equipment reducers are usually used for gear ratios up to about 8:1. Where reduced speeds and higher ratios are required, double, triple, and quadruple equipment reduction stages can be used.
Worm Gear Speed Reducers
A single reduction velocity reducer can achieve up to 100:1 reduction ratio in a little package. Known as right position drives, these consist of a cylindrical worm with screw threads and a worm. With an individual begin worm, the worm equipment advances only one tooth for each 360-degree turn of the worm. So, whatever the worm’s size, the gear ratio is the ‘size of the worm gear to 1′. Higher reduction ratios could be created through the use of double and triple reduction 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 is usually a acceleration reducer, the torque output will increase; if the drive boosts speed, the torque result will reduce. Gear drive selection elements include: shaft orientation, speed ratio, design type, nature of 
load, gear rating, environment, mounting position, operating temperature range, and lubrication.