Double-Sided Timing Belts: A Versatile Power Transmission Solution

April 18, 2024

Besides being double-toothed synchronous belts and both-sided timing belts, double-sided timing belts are mainly used for transmitting power from two rotating shafts. People love chain drives more because of their versatility and superior capacities in several areas.

Understanding Double-Sided Timing Belts

Unlike the standard timing belts that have teeth on one side, these kinds of timing belts possess teeth on both faces. This enables power to be transmitted from the same belt to axles that rotate in opposite directions.

The belts mainly come in two primary materials: polyurethane (PU) and neoprene. PU belts perform well in high-wear environments due to their excellent resistance against abrasion. Neoprene belts, however, provide greater resistance to moisture, grease, oil, and dirt.

Double sided timing belt can be mainly found with either symmetrical or non-symmetrical tooth profiles. Symmetrical profiles offer equal performance on both sides, while non-symmetrical profiles are designed for specific applications, which may include driving on the designated side only, but also some who do not drive.

Benefits and Features of Double-Sided Timing Belts

They have special features that make them an attractive choice for different power transmission needs:

  • Low system weight: Double-sided timing belts are significantly lighter than chain drives and therefore reduce overall system weight and inertia.
  • Optimized space requirements: The ability to transmit power in both directions eliminates the need for separate belts or chains resulting in a more compact design.
  • Reduced friction and noise: Compared to the chain, a double-sided timing belt has lower mechanical friction that imparts greater efficiency, less CO2 emissions, and thus quieter operation.
  • Minimal maintenance: There is no need for re-tensioning or lubrication of these belts, unlike chains, which makes them easier to maintain, minimizing maintenance costs as well as downtime.
  • Durable construction: With a fiberglass tensile cord having high strength, a tooth facing of wear-resistant nylon, and a protective backing (neoprene for standard belts), the service life of this belt is long with reliable performance.

Belt Construction Breakdown

For a deeper understanding, take a look at this breakdown of what comprises a double-sided timing belt:

  1. Fabric: It is made from an elastomer-coated aramid fabric layer, which endows oil resistance and media resistance too.
  2. Compound: This is enhanced by using rubber compound in the cord of the belt which makes it withstand the aging process and fiber coating improves its oil resistance as well as media resistance.
  3. Tensile Cord: The belt relies on a high-strength fiberglass cord for its backbone, which gives it amazing strength with minimal stretch. This cord is also fortified through an elastomer adhesive system that resists oil and other media.

Applications for Double Sided Timing Belt:

Double-sided timing belts can be employed in many different applications because they are very versatile. Here are some examples:

  • Industrial Machinery: Compressors, textile machines, conveyors, pumps, and packaging equipment.
  • Consumer Products: Vacuum cleaners, drills, washing machines.
  • Office Automation: Ticket dispensers, food processors, printers, machines that make LED screens and TVs.
  • Medical Equipment: There are quite a few powerful items, for example, centrifuges. medical diagnostic equipment.
  • Robotics and Automation: Industrial robots and automated systems.
  • Other Applications: Data storage, HVAC systems, oil fields, agriculture, woodworking machinery.


The two faces of the timing belts provide a reliable and efficient means of transmitting power to the opposite rotating shafts in applications where this is required. Double-sided timing belts are valuable to certain industries due to their weightless design, efficient functioning as well as low maintenance costs.

If you need a transmission solution that can serve numerous application requirements while requiring less maintenance, you should look into employing double-sided timing belts instead.


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