Engineering Class Chain


Engineering Class Chain

Engineering class chain is typically large in pitch, greater than two inches, and is designed with higher safety factors and more clearances. There are standard sizes, but most are custom designed for special applications. They are rated by working load and ultimate strength. When designing or selecting engineering chain, the load on the chain tension, environment, and service factors are important considerations.


Types of Engineering Chain

Drive Chain

Constructed with abrasion resistant pins, bushings, sidebars, and a small roller that improves interaction with the sprocket. Applications are usually high speed with short distances between sprockets.

  • Pitch ranges from 1.654 inches to 7.50 inches
  • Working load ranges from 2,485 pounds to 37,000 pounds

Roller Conveyor Chain

Have rollers that are used to convey products and are typically designed with attachments to connect the carrying device (plate, pan, cradle, paddle, etc.) to the chain.

  • Pitch ranges from 1.654 inches to 24 inches
  • Working load ranges from 2,100 pounds to 22,300 pounds

Bushed Chain

Very similar to conveyor chains except they don’t have rollers.

  • Pitch ranges from 2.609 inches to 7 inches
  • Working load ranges from 2,500 pounds to 25,000 pounds

Welded Chain

Have bushings that are welded onto the sidebars and they don’t have rollers. They are often used as conveyor chains and sometimes as drive chains.

  • Pitch ranges from 2.609 inches to 9 inches
  • Working load ranges from 3,500 pounds to 27,600 pounds

Bar and Pin Chains

Don’t have rollers and bushings. Designed for lifting, pulling, or dragging product and are commonly used for high tension applications, draw benches, lifting devices, dam gates, or in-floor conveyors.

  • Pitch ranges from 2.125 inches to 18 inches
  • Working load ranges from 4,000 pounds to 30,000 pounds

Barloop Chains

Don’t have rollers and bushings. They are sometimes called drop forged rivetless chains and are designed for economy and high-strength with extra lateral flexibility for flexing around corners.  A common application is a conveyor trolley system.

  • Pitch ranges from 3.014 inches to 9.031 inches
  • Working load ranges from 2,000 pounds to 10,800 pounds

Detachable Link Chain

Don’t have pins, bushings, or rollers. The links are cast, forged, or molded and connected together to form a chain. Links can be detached and replaced. They lack precision and are often found on old agricultural equipment.

Plastic Engineering Chain

Used where tension is low and corrosion is high. Availability is limited. They are typically used for underwater conveyors or chemical applications.

Key Manufacturers of Engineering Chain We Offer

  • HKK Chain
  • P.T. International
  • Renold Jeffrey
  • Senqcia Maxco (Hitachi)
  • UST Tsubaki

PTDA-Handbook-Cover

Content on this page was created using excerpts from the Power Transmission Handbook (5th Edition), which is written and sold by the Power Transmission Distributor’s Association (PTDA). The Power Transmission Handbook is just under 400 pages and is a valuable resource for anyone involved or interested in the power transmission industry.

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