Gears in gearboxes could be among various forms, from bevel and helical gears to worm gears and planetary gears. The gear is mounted on a shaft supported by roller bearings and rotates around it. To counter this friction, bearings are applied round the shafts. It lowers the friction by rolling https://augustuutrp.glifeblog.com/32639667/the-5-second-trick-for-gearbox