Chain Link Sizes

Unless you work with roller chains, sprockets and attachments on a fairly regular basis, chain link sizes can be a bit of a confusing concept. Exactly how do you need to measure your chain so you can order a replacement option? There are several different considerations when you are looking at chains including the grade, the diameter and the coil as well as the corrosion rating for your particular needs. See how each of these factors should be utilized to ensure that you receive the correct chain for your needs the first time. If you get stuck, our PEER Chain professionals are standing by to help!

Chain Link Sizes & Basics

You're probably used to ordering products with at least two dimensions, such as the length and waist size of your jeans. While there are a few more chain link sizes and shapes to consider, the core concept is the same. Chain link openings can vary based on your particular need and the size of your project. In general, there are long link chains that can accept a shackle bolt anywhere along the length of the chain, while a standard size coil may only allow for shackles to be added to the end links of a particular length of chain. One side benefit of long link chains is that they may the overall chain lighter than those that are standard sizes due to the lesser amounts of metal making up the chain length.

Chain Link Sizes: How to Measure Chain Link Sizes

Measuring the size of a chain requires a simple tool such as a set of calipers. These measuring instruments are incredibly intricate and can measure the smallest details on your chain. The key measurements that you need to grab are the pitch (P), side plate height (H) and thickness (T), pin diameter (E), roller diameter (D), inner width (b1) and the roller diameter (d1). Each of these measures works together to determine exactly the chain that you will need for your project.

Pitch is measured by finding the distance from the center of one pin to the center of the next pin in line. Instead of measuring a single chain link, measure several from various places along the chain to ensure that you're getting a good average readout of the pitch.
Determine your side plate height and thickness by measuring both inside and outside the roller chain to ensure that you're seeing a good average size.
The pin diameter is especially important for chains that you suspect may be non-standard, but it is a useful measurement all the same.
Even roller-less chains technically have a roller diameter, as you can measure the diameter of the bushing instead of the diameter of the roller.
Measuring the total width of the roller provides a very important measurement, helping get you to the correct product line more quickly.
Finally, find the overall chain width and record it, taking special care to measure only the full width of the master link.

While there are several steps involved in measuring chain link sizes, a few moments of detailed notes will help your PEER Chain customer service representative help you quickly and efficiently determine the ideal chain for your unique needs. Contact our chain professionals today at 800-523-4567 or via email to [email protected].