Examples of Gears and Pulleys

A gear is usually one part of a larger object.
••• loraks/iStock/Getty Images

Gears and pulleys are used for many common objects and machines. A gear is "a toothed machine part, such as a wheel or cylinder, that meshes with another toothed part to transmit motion or to change speed or direction." A pulley is "a wheel with a grooved rim in which a rope, chain, or belt can run in order to change the direction or point of application of a force applied to the rope" (Reference 1).


Motorcycles have gears.
••• Jupiterimages/Photos.com/Getty Images

Gears can make things move in different directions, more quickly or slowly. Examples of common objects with gears are non-digital clocks, vehicles, drills, manual can openers and bicycles. Another use for gears is to "expand the physical limits of the human body." Powered wheel chairs and lifts have gears. These devices allow the elderly, handicapped and others to achieve physical feats they normally can't.

Types of Gears

Interior of a washing machine.
••• Hemera Technologies/AbleStock.com/Getty Images

Spur Gears are usually used for "slow speeds." Examples are winches, wind-up clocks, and washing machines. Bevel Gears are used for objects that reach higher speeds, such as certain automobiles and hand drills. Worm Gears are often used in conveyor systems to lock the gears. Locking occurs because "the worm can easily turn the gear, but the gear cannot turn the worm." Helical gears are similar to spur gears but rotate more quietly and smoothly. These gears are used in "almost all car transmissions."


Sailboats have a pulley.
••• John Foxx/Stockbyte/Getty Images

Pulleys can be fixed, movable or both. If a pulley is fixed it is "attached in a position above a load to be lifted." If a pulley is movable it is "attached to a load that is being lifted." These two types can be combined to create a more complex pulley system. Examples of common pulley systems can be found on flagpoles, blinds, elevators, sailboat rigging, cranes, tow trucks, clothes lines and garage doors.

Related Articles

Mechanism Description of a Manual Can Opener
Difference Between Simple & Compound Machines
A Lesson to Introduce Simple Machines
How to Calculate Wheel Circumference
How to Convert RPM to Feet per Minute
Wheel & Axle Function
How to Calculate Rack & Pinion
A List of Simple Machines
How to Identify Three Types of Levers
What are Gehl 4625 Skid Steer Specifications?
Uses of Spur Gears
Parts of a Wheel and Axle
The Types of Simple Machines Found in Your Home
What Are the Materials Used for Spur Gears?
How to Calculate the Speed of Two Different Pulleys
Types of Gyroscopes
How to Make a Block and Tackle System
Examples of Pulleys in Everyday Life
How to Make a Pulley
How Doorknobs Work as a Simple Machine

Dont Go!

We Have More Great Sciencing Articles!