Feather key can be used to prevent axial motion between two elements.

Bevel Gears, Worm Gears and FlyWheel topics: Bevel gears and its terminology, bevel gear strength, worm gears and flywheel coefficient. Some differences between bevel gears, worm gears, and flywheels are: Bevel gears: These gears have angular gear teeth and use the entire width of the interlocking teeth to transmit force. They are used to transfer mechanical energy or shaft power between intersecting shafts, either perpendicular or at an angle. Bevel gears are often mounted on shafts that are 90 degrees apart, but can be designed to work at other angles. Worm gears: These gears are made up... Show more

Bevel Gears, Worm Gears and FlyWheel topics: Bevel gears and its terminology, bevel gear strength, worm gears and flywheel coefficient.

Some differences between bevel gears, worm gears, and flywheels are:
Bevel gears: These gears have angular gear teeth and use the entire width of the interlocking teeth to transmit force. They are used to transfer mechanical energy or shaft power between intersecting shafts, either perpendicular or at an angle. Bevel gears are often mounted on shafts that are 90 degrees apart, but can be designed to work at other angles.
Worm gears: These gears are made up of a worm wheel and a worm shaft with worm gears. Worm gears transfer movement load at right angles with a sliding effect instead of a rolling motion. Worm gears are found in right angle gearboxes.
Flywheels: These are rotating machine elements that store energy.

Related Test: Machine Design Practice Test: Rolling Contact Bearings, Spur Gears and Helical Gears 

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