« Back to Dictionary Index

A triplex chain is a type of roller chain that features three rows of rollers.


  1. Triplex Chain Definition: A triplex chain is a roller chain with three parallel rows of rollers, providing increased strength and load-bearing capacity compared to single-row (simplex) and double-row (duplex) chains.

Key Features:

  1. Three Rows of Rollers: The triplex chain consists of three parallel strands of rollers, pins, and plates. Each row operates in tandem, distributing the load across a larger surface area.
  2. Increased Strength: The design of the triplex chain allows it to handle higher loads and transmit more power compared to simplex and duplex chains.
  3. Durability: Triplex chains are highly durable and suitable for applications that require long-lasting performance and high reliability under heavy loads.


  1. Industrial Machinery: Used in heavy-duty machinery where high load capacity and durability are critical, such as in conveyors, hoists, and mining equipment.
  2. Automotive: Commonly used in automotive applications, including timing chains in engines that require precise synchronization and high strength.
  3. Agricultural Equipment: Utilized in farming machinery that needs to withstand heavy use and harsh conditions, such as combines and harvesters.
  4. Power Transmission: Employed in various power transmission applications where robust performance is essential.


  1. High Load Capacity: The triplex chain’s design allows it to carry significantly higher loads than simplex and duplex chains, making it ideal for demanding applications.
  2. Improved Wear Resistance: With three rows of rollers sharing the load, triplex chains exhibit better wear resistance, leading to longer service life.
  3. Enhanced Reliability: The robust construction of triplex chains ensures reliable performance even under harsh operating conditions.


  1. Lubrication: Regular lubrication is necessary to maintain the smooth operation and longevity of triplex chains.
  2. Inspection: Routine inspection for wear, tension, and alignment is crucial to prevent premature failure and ensure optimal performance.
  3. Replacement: Worn-out chains should be replaced promptly to avoid damage to other components in the system.

A triplex chain, with its three rows of rollers, offers superior strength, load capacity, and durability compared to simplex and duplex chains. It is widely used in industrial, automotive, agricultural, and power transmission applications where robust performance and reliability are essential. Proper maintenance, including regular lubrication and inspection, ensures the longevity and optimal functioning of triplex chains in heavy-duty applications.


  • Duplex chain
  • Simplex chain
« Back to Dictionary Index