Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 pieces of gears. Power is certainly transmitted from a high-velocity pinion to a slower-speed gear. Helical gears usually operate with their shafts parallel to one another. Both most common types are the concentric (input and output shafts are in line) and parallel shaft (insight and result shafts are offset). Single-stage helical equipment reducers are typically used for gear ratios up to about 8:1. Where lower speeds and higher ratios are required, double, triple, and quadruple equipment reduction stages may be used.
Worm Gear Speed Reducers
A single reduction acceleration reducer can achieve up to a 100:1 reduction ratio in a small package. Known as right angle drives, these consist of a cylindrical worm with screw threads and a worm. With a single start worm, the worm equipment advances only 1 tooth for each 360-degree change of the worm. So, regardless of the worm’s size, the gear ratio is the ‘size of the worm equipment 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. right angle worm gearbox Because of this, torque output would be the inverse of the function. If the enclosed drive is a rate reducer, the torque output will 
increase; if the drive boosts speed, the torque result will reduce. Gear drive selection factors include: shaft orientation, speed ratio, design type, nature of load, gear rating, environment, mounting position, operating temperature range, and lubrication.