鎖くさり歯は車ぐるま

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Meanings

1

noun

sprocket wheel

A toothed wheel that engages with a chain, used in bicycles, motorcycles, and machinery.

chain, irons, connection

歯tooth, cog

歯は車ぐるま
歯車 is a general gear, while 鎖歯車 specifically refers to a sprocket that engages with a chain.
スプロケット
スプロケット is the common loanword for sprocket, often used in technical or cycling contexts, while 鎖歯車 is a native Japanese compound.

Compound of 鎖 (くさり, 'chain') and 歯車 (はぐるま, 'gear'), literally 'chain gear'.