At Diamond Chain, our focus and dedication to excellence sets us apart. The chains we design and manufacture not only meet industry standards, they also conform to our own rigorous internal guidelines. We build our commitment into every product.


At the Diamond Chain Company, we pursue our calling to design and manufacture the world’s highest performing roller chain every day. Our teams of passionate technical experts make your success their life’s work.

It is that intensity of focus that the world’s greatest inventors have trusted to provide the roller chains needed to transform the world. From the Wright Brothers, to Henry Ford, to the global industrial leaders of our time, Diamond Chain has always been the most trusted roller chain when performance matters the most.


The Diamond Chain Company’s proprietary material standards and manufacturing processes form the core of the Diamond Difference. The Diamond Difference begins with raw materials that meet exacting standards for metal grade, mechanical properties, carbon, and alloy content to ensure the minimization of impurities that impact tensile and fatigue strength.

These proprietary standards enable Diamond Chain components to maintain tighter tolerances throughout the fabrication and assembly process, for a finished product with unparalleled quality, performance, and longevity.


While roller chain may appear to be a simple product, the number of components in a ten foot section of 40 pitch chain totals 1,200 pieces—each a potential point of failure.

Diamond Chain designs each component to exacting dimensional standards, and has a rigorous quality control system in place to ensure that only qualified pieces reach the final assembly stage.

  1. PLATES: Inner and outer plates go through a four-stage pitch hole process. We use a multi-stage process to create a maximum bearing area that is straight, smooth, and burr-free.
  2. PINS: Precision grinding ensures consistent fit and smooth travel.
  3. ROLLERS: Seamless roller design and dimensional control allow for extrusion with near perfect roundness.
  4. BUSHINGS: Dimensional control enables bushings to be extruded with uniform wall thickness and concentricity for smooth travel. Near perfect roundness increases the effective bearing area for the pin.


The Diamond Chain Company heat-treats components using dedicated carburizing furnaces set to precise temperatures.

Through strict control of both atmosphere and quench, Diamond Chain components receive maximum carbon penetration for a high carbon surface and low carbon core. The process ensures consistent depth of case hardening increasing strength, durability, and wear resistance.


The Diamond Chain Company uses proprietary shot peening machinery developed and custom-made to ensure consistent intensity and coverage of components during the shot peen process.

This highly controlled process ensures that components receive the same level of treatment for a consistent compressive surface stress that helps to increase fatigue resistance.


Diamond understands the importance of proper lubrication and its impact on a chain’s wear life. Diamond Chain uses both a proprietary lubrication formula and a hot dip application process on all lubricated roller chains. The hot dip process ensures complete coverage of components while the proprietary lubricant maintains maximum continuing surface retention following the treatment. Special additives in the lubricant further enhance corrosion protection and extend wear life.


The final stage of the manufacturing and assembly process for each Diamond roller chain is the preloading stage. Preloading approximates the recommended maximum loading during usage and is done to firmly seat pins and bushings in place and eliminate any initial elongation that may affect the chain.

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