Roller Chain Case Studies

Doughnut Fryer chain wearing too quickly

Case Study Snapshot


Premature chain wear


Extended service life of the attachment chain


Replace current chain with Diamond’s 300 stainless steel series

Cost Savings:

$3,500 per year

Chain Wearing Prematurely

Doughnut Fryer

The Challenge:

A national snack food manufacturer was looking for a service life upgrade for its roller chain with attachments.

The roller chain was used in a fryer application, which attached to a wire belt that travelled through hot oil, ensuring that doughnuts travelled from the batter dispenser through the frying process without sinking to the bottom of the fryer trough.

In order to meet the FDA requirements for food contact surfaces, American Iron and Steel Institute (AISI) 200, 300, and 400 Series Stainless Steel with a minimum chromium content of 16% would be required.

In addition, due to the continuous contact with oil from the fryer, lubrication of the chain would be an ongoing challenge.

The Choices:

A Diamond Chain manufactures stainless steel roller chain in a variety of configurations.

Diamond’s AP series stainless steel roller chain features 300 series link plates, bushings and rollers with a precipitation-hardened stainless steel pin for an increase in wear life over standard 300 series stainless steel.

Diamond’s 300 series stainless steel roller chain is assembled entirely from austenitic components and features excellent corrosion resistance.

Diamond’s 400 series stainless steel roller chain features link plates manufactured from 300 series stainless steel with pins, bushings and rollers that are produced from 400 series stainless for superior wear resistance.

The Solution:

The snack food manufacturer selected Diamond’s 300 series stainless steel roller chain as the solution for this application. 300 series is an ideal solution for food handling purposes in that it provides excellent corrosion resistance, has very low magnetic permeability and is considered non-sparking, which is especially important when working with oil in fryer applications.

Although initially considered a concern, lubrication turned out to be an insignificant issue. Traditionally, a mineral oil based lubricant is used for chain in food applications, but this wasn’t an option due to contact with the oil. Instead, the hot oil from the fryer acted as the chain’s lubricant, while an oil filtering system ensured that contami- nants were removed from the frying trough in order to prevent contamination and buildup in the chain’s pin and bushing area.

The Results:

With a switch to Diamond’s 300 series stainless steel roller chain, this manufacturer would see an increase of six weeks of service life in addition to purchase cost savings of $3,500 per year.

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ASME / ANSI Roller Chain

Diamond Series

Diamond Chain's extensive ASME / ANSI product assortment provides industry leading wear life and is available in a variety of base materials, finishes, and lubrications.

Attachement Roller Chain

Infinity Series

Available in ANSI 25 through 240 and ISO 05B through 032B. Includes single and multi-strand, heavy series, and solutions for specialized applications.

Oil and Gas Chain

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Includes ANSI 25 through 160 and ISO 05B through 048B single and multi-strand, and select maintenance-free, and attachment solutions.