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Diamond Chain E-Newsletter Archive



At the Diamond Chain Company, we manufacture the world's highest-performing roller chain. From the Wright Brothers, to Henry Ford, to global leaders of our time, Diamond Chain is the roller chain most trusted to perform, when performance matters most.
Case Study: Doughnut Fryer


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


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." 


The Plant Manager for this Concrete Products Division evaluated several chain choices ranging from inexpensive economy chain to high performance Diamond series roller chain, which has an industry reputation for delivering best-in-class dependability and wear life.


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


The Choices


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 contaminants 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.



Q - Is there a maximum operating temperature for standard carbon-steel roller chain?


A- Standard roller chain can typically be used in applications with temperatures up to 350 degrees Fahrenheit.  When temperatures exceed 350 degrees, chain with additional clearance between components may be necessary.


Q - What about lubricant in high temperature applications?


A- Most petroleum based lubricants are good for up to 300 degrees Fahrenheit.  For temperatures above and beyond that, synthetic lubricants are necessary as they can operate between 300 and 700 degrees Fahrenheit.


In order to guarantee that you are purchasing authentic Diamond Chain products, you should always buy from an authorized Diamond distributor.


For help locating an authorized distributor, you can use our distributor locator available here for our North American customers and here for our European customers.


Have additional questions about roller chain? Drop us an email at For further assistance, please contact Diamond Chain's customer service and application engineering teams at 1-800-872-4246.

One of the best ways to keep in touch with the Diamond Chain Company is through our Facebook page.


Find out about upcoming trade shows, contests, fun facts and more!


You can find our Facebook page by following the link here


The 97th running of the Indianapolis 500 is coming up on Sunday May 26th.
Diamond Chain and the Greatest Spectacle in Racing share a common founder - both having been started by Arthur Newby.

A possible cause of uneven pin wear is misalignment of the drive shafts.

Place a machinist's level directly on the shaft, if accessible, to determine if any adjustments are necessary.

When checking the alignment on a shaft with a multi-strand sprocket, place the level across the teeth of the sprocket.

Diamond Chain's spring session of the Diamond Institute of Technology is currently under way.   
Participants at a DIT training event receive a customized roller chain curriculum that includes both classroom and lab activities.
For information on attending an upcoming Diamond Chain training,  your local sales representative or send us an email at


Diamond Chain Company 

402 Kentucky Ave

Indianapolis, IN 46225


PH: 800-872-4246  




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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

Sapphire Series

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