Spur gears are mounted in series on parallel shafts to achieve large gear ... Its normal gear ratio range is 3:2 to 10:1. Bevel gears are used to change the direction of a shaft’s rotation.

Parallel types include spur and helical. Nonparallel types include bevel, hypoid, and worm. Spur gears. Cylindrical gears with teeth that are straight and parallel to the axis of rotation.

Bevel gears have teeth cut at an angle, allowing them to transmit motion between shafts that are not parallel. They are often used in applications where space is limited, such as hand drills and ...