Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 units of gears. Power is certainly transmitted from a high-speed pinion to a slower-speed gear. Helical gears usually operate with their shafts parallel to each other. Both most common types are the concentric (input and output shafts are in collection) and parallel shaft (insight and result shafts are offset). Single-stage helical gear reducers are typically used for equipment ratios up to about 8:1. Where lower speeds and higher ratios are needed, dual, triple, and quadruple gear reduction stages can be used.
Worm Gear Speed Reducers
A single reduction rate reducer can achieve up to 100:1 reduction ratio in a small package. Referred to as right position drives, these contain a cylindrical worm with screw threads and a worm. With a single start worm, the worm gear advances only one tooth for every 360-degree turn of the worm. So, whatever the worm’s size, the gear ratio may be the ‘size of the worm gear to 1′. Higher decrease ratios can be created by using double and triple reduction ratios.
Basic Types of Gearboxes
The purpose of a gearbox is to increase or reduce speed. Consequently, torque output would be the inverse of the function. If the enclosed drive is a velocity reducer, the torque output will increase; if the drive improves speed, the torque result will decrease. Gear drive selection factors include: shaft orientation, quickness ratio, design type, nature of load, gear rating, environment, mounting position, working temperature range, and lubrication.
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