Gears in gearboxes is usually one of many sorts, from bevel and helical gears to worm gears and planetary gears. The equipment is mounted with a shaft supported by roller bearings and rotates around it. The skew bevel helical gearbox mirrors the bevel helical model but differs in shaft orientation. https://gearboxauto97429.blue-blogs.com/40913005/a-review-of-gearbox