Metal-chain drives are normally used for applications below 3,000 rpm where accuracy and reliability must be greater than that provided by rubber belts. ... Chain drives use two types of links: ...

Metal Chains. Nov . 15, 2002. There are ... extremely close fit between sprockets and link and are not designed to ... efficient operation of standard roller chain, except that pitch is twice as ...

Narrator: Even in the high-end world of jewelry, Cuban link chains are a symbol of luxury. This 18-karat gold chain is worth $27,000. And some of the most valuable chains will cost 10 times that.