Gearboxes or also commonly called gear reducers or enclosed speed reducers are used on many electromechanical drive systems as depicted . Gearboxes, are essentially multiple open gear sets contained in a housing. The housing supports bearings and shafts, holds in lubricants, and protects the components from surrounding conditions. You can check this link https://www.gear-exchange.com.au/ to get information about gear boxes.
Gearboxes are available in a wide range of load capacities and speed ratios. The purpose of a gearbox is to increase or reduce speed. As a result, torque output will be the inverse of the speed function. If the enclosed drive is a speed reducer (speed output is less than speed input), the torque output will increase; if the drive increases speed, the torque output will decrease.
For the vast majority of gate drives, the speed is being reduced and hence the torque is increased. Thus, gearboxes are commonly called gear reducers in gate drive applications.
Gear drive selection factors include: shaft orientation, speed ratio, design type, nature of load, gear rating, environment, mounting position, operating temperature range, and lubrication. Helical gearboxes and worm gearboxes are among the more common types for electromechanical drives