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 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.

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers.



Use

• Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
• In older automobile engines from the United States and other countries, roller chains would traditionally drive the camshaft(s) off the crankshaft, generating less noise than a gear drive as used in very high performance engines, and offering more durability than the timing belt frequently used on more modern engines. Many modern automobile engines still use roller chains, which are more durable than timing belts.
• Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains

SHI ROLLER CHAINS.

• For over years, SHI Roller chains has been devoted to improving the quality of roller chain, and in so doing has become the trusted name in the field of roller chains and other chain products. The company now supplies chain in a huge variety of types, sizes, and materials to meet diverse demands in a wide range of applications, and maintains a long-standing reputation for quality and reliability around the world.
• Shi roller chain have found that superior technology and rapid progress go hand in hand with satisfying new and diverse application requirements of our customers.
• In designing innovative new types of roller chain and other chain products, our overriding aim has always been to develop super high performance and outstanding wear life standards that far outstrip the nearest competitors. In addition to this we offer the widest range of products, from standard RS roller chain to custom-made chain and chain with attachments, to meet every need.