What does sprocket mean?
A sprocket is a toothed wheel that engages with a chain, track, or similar mechanism. Its teeth catch the links or ridges of the connecting element, allowing a rotating component to transmit motion and tension. The term is especially familiar in cycling, where the rear sprocket works with the chain to help the bicycle move under different gear ratios, and it is also used in industrial machinery, conveyors, and other mechanical systems. “Sprocket” normally refers to the entire wheel or component, while an individual tooth is often called a cog. The word is mainly technical but has become common enough in sports and mechanical discussion to be readily understood by general audiences. Its usefulness as a vocabulary word lies in distinguishing a chain-engaging toothed wheel from other kinds of gears and cogs.
nounA sprocket is a wheel with teeth or projections that engages with a chain, track, or similar mechanism, transferring motion or tension between rotating parts. In bicycles, the term may refer to the toothed wheel that drives the chain.
- A toothed wheel that engages with a chain, track, or other toothed mechanism.
- The chain-driven wheel of a bicycle or similar machine.
"The chain jumped off the sprocket when the cyclist changed gear too abruptly."
"The sprocket transfers the bicycle's power from the pedals to the chain."
"A worn sprocket can cause the chain to slip under heavy loads."
The usual plural form for separate sprocket wheels or components.
"The bicycle has two sprockets at the rear hub."
A sprocket is where a chain gets its bite.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sprocket come from?
The exact origin of the word sprocket is uncertain. It became established in English in mechanical usage, with related compound forms such as sprocket wheel developing to describe the toothed wheel used to engage chains and tracks.
How sprocket is actually used
The word is primarily technical and is most common in mechanical, cycling, and engineering contexts. In general conversation, it usually refers to the wheel rather than an individual tooth.
Easily confused with sprocket
A cog is one tooth or projection on a gear or wheel, whereas a sprocket is the complete toothed wheel that engages with a chain or track.
A gear is a general term for a rotating machine element with teeth, while a sprocket specifically engages with a chain, belt, or track.