The cheapest energy is the energy you don’t use
"Approximately one third of motors are equipped with friction belt drives. The performance and efficiency of many belt drives can be improved through...
The Tandler SP2 planetary spiral bevel gearbox is a combination of spiral bevel, planetary and worm gear technology allowing changes in the angular position of the output shaft relative to and at right angles to the input shaft. The SP2 speed modulation gearbox also provides the capability to vary the output speed within a narrow range.