Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 pieces of gears. Power is definitely transmitted from a high-acceleration pinion to a slower-speed equipment. Helical gears usually 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 (input and output shafts are offset). Single-stage helical gear reducers are usually used for gear ratios up to about 8:1. Where reduce speeds and higher ratios are needed, 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 decrease ratio in a small package. Referred to as right position drives, these contain 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. So, whatever the worm’s size, the gear ratio may be the ‘size of the worm equipment to 1′. Higher decrease ratios can be created through the use 
of right angle worm gearbox double and triple decrease ratios.
Basic Types of Gearboxes
The objective of a gearbox is to increase or reduce speed. Because of this, torque output will be the inverse of the function. If the enclosed drive is definitely a rate reducer, the torque output will increase; if the drive increases speed, the torque output will decrease. Gear drive selection elements include: shaft orientation, velocity ratio, design type, nature of load, gear ranking, environment, mounting position, operating temperature range, and lubrication.