About Chain & Sprockets
If you are a bit unsure about the various chain number options when you’re trying to replace a part for your machines, you’re certainly not alone. The American National Standards Institute (ANSI) has developed a range of standardized requirements for excellence in chains, with the numeric indicator helping define the information you need to know about a chain quickly including the pitch, tensile strength, plate height and thickness, width and more. Each of these measurements helps ensure that you are getting exactly what you need for safe and long-term work from your machinery. Here’s what you need to know to understand the ANSI roller chain numeric system.
Specifics of ANSI Numbering
Finding a chain with number on it might be a bit challenging, especially if you're dealing with aging machinery. Fortunately, you can easily equate the exact size of a chain to an ANSI numeric indicator with only a few measurements. For instance, a 40R roller chain has a pitch (P) of 0.250 in., roller width (W) of 0.125 in. and a pin diameter (D) of 0.091 in.. With these measurements in hand, you can safely identify the correct part for your project. The full range of specifications that make up ANSI standards are:
- Pitch (P)
- Roller Width (W)
- Roller Diameter (R)
- Plate Height (H)
- Plate Thickness (T)
- Pin Diameter (D)
- Overall Width Over Regular Pin (F + F)
- Overall Width Over Connecting Pin (F + G)
Along with these size-related measurements, roller chains also are measured by their Average Tensile Strength (measured in Lbs.) and their Average Weight Per Foot (measured in Lbs./Ft.). These vital measurements can help ensure you are utilizing the correct type and weight of chain for your particular application.
Range of the ANSI Standard Roller Chain Number System
If you're measuring your chain and find that your dimensions don't exactly match one of our ANSI standard roller chain sizes, there's always a possibility that you have a non-standard roller chain or an ISO British (Metric) Standard Chain.
While roller chains are complex parts of a machine, the friendly service professionals at PEER Chain are always ready and willing to provide assistance and insight to keep your project moving. You can learn more about the various chains with a number on them in our online resources section or by calling us at 800-523-4567 or sending an email to firstname.lastname@example.org. We provide a wide range of products that are used in industries from agriculture to lumber and sewer treatment facilities and take pride in being able to quickly provide the right chains and attachments to keep you moving
About Chain & Sprockets
There are many different (and sometimes confusing!) terms associated with chains, but never fear — your PEER Chain team is here to help! We believe that educated consumers are able to make the best decisions about their needs, so let’s demystify these terms and share everything that you need to know about chain terminology. You may want to bookmark this helpful guide as a quick reference for the future.
Overview of Chain Terminology
There are several key components that make up a standard roller chain:
- Roller Link: Inner Link composed of 2 Roller Link Plates, 2 Bushings, and 2 Rollers
- Pin Link: Outer Link composed of 2 Pin Link Plates and 2 Pins
- Spring Clip Style Connecting Link: Outer Link composed of 1 Press Fit Plate with 2 Pins, 1 Detachable Slip Fit Plate and 1 Spring Clip
- Cottered Style Connecting Link: Outer Link composed of 1 Press Fit Plate with 2 Cotter Pins, 1 Detachable Slip Fit Plate and 2 Cotter Keys
- Offset Link: Link composed of 2 Offset Plates, 1 Cotter Pin with 1 Cotter Key, 1 Bushing, and 1 Roller (Note: #25 and 35 chains are rollerless chains)
Together, these components make up a completed roller chain. Roller chains can be either single-strand or multiple-strand and come in a range of sizes, with different tensile strength and working loads. Together, the tensile strength and chain load ratings help buyers determine which chain is right for their unique needs.
Additional terms that are used to describe chains include:
- Chain Pitch describes the distance between the pin center points on a single Pin Link. The number to the left of the right-hand digit in a standard roller chain size denotes the number of ⅛ inches in the pitch. (Ex: 40 Riv = 4/8 = ½” Pitch)
- Heavy Series Chain differs from standard series in the thickness of the plates.
- Chain Preloading refers to preloading during the manufacturing process. This also is sometimes referred to as Pre-Stretching.
- Minimum Ultimate Tensile Strength is the minimum force at which an unused, undamaged chain could break when subjected to a single tensile loading test.
- Attachments are adaptations to standard roller chain components to modify the chain for use in multitudes of applications. Attachments are commonly seen on pin links, roller links, and connecting links.
- Chain elongation is defined as the difference in length of a chain due to wear. During normal operation, the pins articulate within the bushings. The outside diameter of the pin decreases as the inside diameter of the bushing increases from wear.
At PEER Chain, we take pride in our exceptional customer service that starts long before a sale. We feel it’s important to help you learn more about chain ratings and the different types of chains so you can quickly and easily work through your next project. Contact our team of proactive service professionals today by calling 800-523-4567 or via email to email@example.com. You can also find out more about our products and services online and see the industries that we serve.