Category Archives: Engineering Class Chain

Chain Assembly in the Field

When it comes time to assemble your welded steel chain in the field, there are a few critical things that every customer should know.

First, the sidebar holes must be lubricated. Moly-Paste, 30W oil, WD40 or other types lubricants will work. Next, place the pin in the chain joint and press the pin in as far as possible. Keep in mind that if your pin is constructed with flats, you will want to line up the flats in the sidebar. Then you will begin tapping the pin with a hammer until snug.

Secondly, securing the chain joint to prohibit lateral movement is vitally important. In order to accomplish this, you will need to place a spacer bar between the outer sidebars and clamp it in place. This will keep the sidebars from moving in relationship to each other. The pin can be installed with a portable hydraulic press or driven in with a sledge hammer. Lastly, you will press or drive the pin into the chain until the head meets the sidebar.

Once the pin is in place you will need to determine whether you have cotter pins or rivet pins.

If you have a cotter pin you will need to follow these instructions:

  1. Install the cotter with a hammer and bend the ends enough to secure the cotter in the hole.

If you have a rivet pin you will need to follow these instructions:

  1. Heat the end of the pin (non-head side) with a rosebud or torch until the pin end is red in color.
  2. Rivet the pin end with a portable hydraulic press or peen over with a hammer.
  3. If the chain does not flex freely, hit the head end and rivet end alternately with a hammer to establish clearance. This will establish the necessary clearance without affecting the designed press fit in the sidebars.
  4. The integrity of the press fits must be maintained. Therefore, grinding pins or modifying the sidebar pin holes to facilitate assembly will void the warranty.

Watch the video below for a tutorial on how to install riveted pins.

Made-to-Order Chain & Conveyors

While many companies are relying increasingly on outsourcing for production needs, Webster Industries is a fully integrated manufacturing facility. Our manufacturing operation consists of a fully functioning foundry as well as departments including sheet metal fabrication, machining, punching and stamping, heat treatment, welding and chain assembly.

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Engineering Class and Roller Chain – There is a difference

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Engineering Class and Roller Chain – There is a difference

Remember the basic rule is Roller chains for power transmission and Engineering class chains for material handling. Then, remember that although both carry the same generic name, there are major differences in construction and in application. It is the knowledge of when to use either that will determine how effectively you use chain in your application.

In our reports on engineering class chain we emphasized the pin as being the “heart of the chain”. For material handling and other severe applications we advised to always select the largest pin diameter available in your pitch size. Whenever you use a roller such as in roller chains, you restrict the design possibilities especially the diameter of the pin. As the pin size increases so does the bushing and roller diameter. At a certain point the roller can become so large a sprocket tooth will not sufficiently fit in the proper space. As the pin size is restricted in roller chains so is the possible rated working load and average ultimate strength of the chain.

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