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-rate pinion to a slower-speed equipment. Helical gears usually operate with their shafts 
parallel to one another. The two most common types will be the concentric (insight and result shafts are in range) and parallel shaft (input and result shafts are offset). Single-stage helical gear reducers are usually used for equipment ratios up to about 8:1. Where decrease speeds and higher ratios are required, dual, triple, and quadruple equipment reduction stages may be used.
Worm Gear Speed Reducers
A single reduction acceleration right angle worm gearbox reducer can achieve up to a 100:1 decrease ratio in a small package. Known as right position drives, these consist of a cylindrical worm with screw threads and a worm. With a single begin worm, the worm equipment advances only one 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 can be created through the use of 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 can be a swiftness reducer, the torque result increase; if the drive increases speed, the torque result will decrease. Gear drive selection elements include: shaft orientation, quickness ratio, design type, character of load, gear rating, environment, mounting position, working temperature range, and lubrication.