In essence, gears are merely circles with tooth connecting them. A gear transmits a circular motion amongst two different shafts by rotating and meshing with another gear on another shaft. Gears occur in many different shapes and sizes, which includes spur gear, helical equipment, bevel equipment, and worm gear. https://gearbox42075.bloggip.com/33859815/how-much-you-need-to-expect-you-ll-pay-for-a-good-gearbox