Chain Coupling

Steel Roller Chain Shaft Coupling

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As one of leading chain sprocket manufacturers, suppliers and exporters of products, We offer chain sprocket and many other products.

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Applicable Industries: Manufacturing Plant, Machinery Repair Shops, Construction works , Energy & Mining

Structure:Roller Chain

Flexible or Rigid: Flexible

Standard or Nonstandard: Standard

Material: Steel

Place of Origin: Henan, China

Application: Textile, agricultural machinery, lifting transportation

Type: Flexible chain


Weight: 12.7kg

Shaft: 20-80mm

Simple structure coupling comprised of two-strand roller chains and two sprockets.
Its centering tolerance between both axes is large, ensuring high transmission ability despite its compact size.
Some types of finished products have been processed according to the new JIS standards for keys, and in some other types, their shaft hole has been processed. The “Chain” coupling is considered a “flexible” coupling, although they’re really pretty rigid when connected. And while they will withstand some misalignment, the perfect application would have the attached equipment be Laser Aligned, or properly aligned with dial indicators and a lot of skill.

Chain Coupling

The total coupling is made up of 4 components. The main components are 2 sprockets with hardened teeth (not just ordinary sprockets), bored to proper dimensions for mounting on the driver, and driven shafts. These sprockets are available as “taper-lock” types of bushings as well for easier mounting and flexibility. The second component is a “double-row” roller chain of the proper pitch to mate with the sprockets. And finally, we have an outside “Case” that covers the complete chain and sprocket mechanism and is there to keep the lubricating grease from flying around during shaft rotation.

Mounting of the sprockets is rather straightforward in that they are mounted on the driver and driven shafts and positioned with the proper clearance between them so that the roller chain wraps around the sprockets and meshes properly with the teeth.

The body consists of two dedicated sprockets with hardened teeth and a two-strand roller chain. The sprockets are coupled when the chains are wound around the sprockets and decoupled when the chains are removed. Therefore, transmission power can be coupled or separated without moving the transmission system, which can be a real plus for some equipment.

The casing can be separated at a right angle to the shaft for ease of mounting and inspection. The mating part to the hub is finished precisely to hold the hub firmly with no eccentricity. Furthermore, the other hole has a trapezoidal groove into which an oil seal has inserted the prevention of oil leakage while holding the sprocket boss flexibly so that the flexibility of the coupling will not be lost. The coupling life is notably extended due to the prevention of both lubricant spatter and the infiltration of dust particles when installing the casing, which ensures effective lubrication. The casing protects the unit from corrosion and ensures safe operation. If the coupling is used under frequent start and stop operation or excessive vibration, contact the manufacturer for proper recommendations.

Characteristics of Chain Coupling:

Compact size, higher transmission efficiency than other couplings, cost-effectiveness
Easy to handle and center.
The clearances between the chains and sprockets and between chain components absorb the great positional misalignment of both shafts.
Highly resistant to its operating environment with a long life
The clearance between the sprocket and chain allows flexible transmission.
Both shafts can be easily coupled or decoupled with a single joint pin inserted into or extracted from the roller chains.


Chain couplings are usually employed in low to moderate speed, high torque applications and are not often found in higher speed applications where grid, gear, and other more sophisticated couplings predominate. They are considered to be fairly rugged and easy to install. Typical applications include line-shaft couplings on live-roller conveyors. Here, the plastic chain provides a lubrication-free coupling solution that requires neither covers for lubricant retention nor coupling guards because the smooth outer surface of the chain presents no catch hazards.

For standard power transmission applications, chain couplings can be purchased in a range of shaft sizes and torque capacities, with typical bore diameters up to 4-1/2 in. and torque capacities up to 220,000 in.-lbs. available. Allowable angular misalignment is usually a maximum of 1° and parallel misalignment is usually limited to 2% of the chain pitch. Sometimes these allowances are decreased for installations that operate at higher speeds.

Sprockets are sized in two-tooth intervals to correspond to the roller chain links, with pitches based on ANSI standards (i.e., #40, #60, #80). Ordinarily, the manufacturer will select the appropriate sprocket size and pitch for the given torque requirements, but knowing the pitch of the sprocket makes it possible to select an appropriate replacement chain.

Specifying a chain coupling requires knowing the required bore, calculating the transmitted torque, then applying a multiplier supplied by the manufacturer that rates the severity of the service, usually by machine type. Manufacturers often have on-line calculators to help specifiers in selecting couplings.

We have the experience of foreign advanced technology, advanced equipment, professional management team and complete the process, but in strict accordance with iso9001/ts16949 regulate production, thus ensuring the quality of each of manufactured products. While “reasonable price, prompt delivery time” to establish a good reputation among customers, the company has a number of domestic users and manufacturers to establish a solid relationship between supply and demand. While 80% of the company’s products are exported to the united states, germany, japan, italy, malaysia, australia, the middle east and other countries and regions. Praised by users.