Roller chains can be measured according to standards of measurement for the type of chain you are working with. Precision roller chains are used in many different applications and are manufactured to strict industry standards, such as ANSI/ASME and ISO British Standards. Because roller chain must interact directly with sprockets and other moving machine parts, it is necessary to measure its dimensions precisely. Therefore, it is important to measure all components of roller chain in order to identify the correct chain.
Knowing the size of your roller chain is an important part of knowing how and where it can be used. PEER part numbers or item descriptions are typically indicated on the chain plates and product packaging. Using the PEER part numbers, you can easily find the chain size and specifications on PEERchain.com. If you do not have access to PEER part number, then you may need to measure the chain.
As a first step, we should define the components of roller chain.
- Pin Link Plate: This is an outer plate on the pin link of roller chain. It can be straight or figure-8 shaped.
- Roller Link Plate: This is an inner plate on the roller link of roller chain. It can be straight or figure-8 shaped.
- Roller: This rotates on top of the bushing on the roller link.
- Pin: This is press fit into the pin link plate and bisects the bushings in the roller link.
- Bushing: This is press fit into two roller link plates and is bisected by the pin in the pin link.
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How To Measure Roller Chain Size
Each of these components will be measured separately.
Roller chain sizes are measured according to the following dimensions;
- Pitch: The length measured from center of pin to center of pin.
- Roller Width and Diameter
- Plate Height & Thickness: Plate height is the dimension from top of plate to bottom of plate. For figure 8 chain it is measured from the widest point on the plate. The plate thickness is simply the thickness of the plates from one flat side to the other side of the same plate.
- Pin Length and Diameter: Pin length is the measurement from the outside of pin end to the other side of pin end. Pin diameter is measurement of the outside diameter of the pin.
Often times the plates are stamped with chain size (i.e. 40, 08B, C2040, etc.). These can come in the form of numbers or letters stamped on the outside of the side plate and can help you to look up the full dimensions of your chain via manufacturer provided information.
Some roller chains will come with attachments that are used for various purposes. Do you have questions about the attachments your chain currently has, or need some help finding the right chain size replacements? Contact our friendly and knowledgeable professionals at 800-523-4567 between 7:00 AM and 6:00 PM CST/CDT or via email to info@PEERchain.com.