http://www.manhuzice.in.rs/tehnicki_recnik.html
sprocket chain - Galov lanac


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Note added at 20 mins (2011-11-29 11:53:10 GMT)
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http://www.agri-mar.com/stranice/proizvodi.htm
Galov lanac je mašinski element za prenos velikih sila i okretnih momenata koje drugi elementi za prenos kružnih gibanja ne bi izdržali. Karakteriše ga velika čvrstoća (determinisan materijalom od kojeg je izrađen), mogućnost prenosa velikih snaga, visoka otpornost na spoljašnje uticaje (masnoće, vlaga, prašine) te dug životni vek.

http://en.wikipedia.org/wiki/Sprocket
Sprockets and chains are also used for power transmission from one shaft to another where slippage is not admissible, sprocket chains being used instead of belts or ropes and sprocket-wheels instead of pulleys.
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See also

* Roller chain (or "sprocket chain")

Takođe može i "roller chain":
http://en.wikipedia.org/wiki/Roller_chain
Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire and tube drawing machines, printing presses, cars, motorcycles, and simple machines like bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient[1] means of power transmission.