Timing Belts

SKU: TB Category:

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Timing belts are designed for diesel engines and for petrol engines as well; they are installed on passenger vehicles and commercial vehicles. Belts can be manufactured with different tooth structures and profiles to meet the performance of modern engines.


Today, car belts are subjected to stresses and working conditions that a few years ago seemed unthinkable:

  • High diesel injection pressure where in some applications it exceeds 2000 bar
  • High stress on multi-valve engines with double camshafts
  • Engines with high power and engine compartment temperatures above 120°C/250°F

Quality of timing belts

Some characteristics of the timing belt:

  • Noise reduction
  • Minimum dimensional tolerances
  • Reduced elongation
  • High abrasion resistance of the cover fabric on the teeth
  • Superior duration and longer performance

Timing belt range

Dayco offers a wide range of timing belt solutions on the market:

  • NR: first-generation timing belt, with reduced work loads and thermal stresses (working temperatures 80°C-90°C/175°F-195°F).
  • HSN: they offer superior resistance to high working temperatures (even up to 110°C/230°F) and pulsating loads.
  • HDT: they are designed for particularly demanding and heavy duty applications. To increase the lateral wear resistance they are equipped with a special fabric on the back withstanding temperatures up to 115°C/240°F.
  • HT: with tooth fabric coated with a PTFE film (highly abrasion-resistant material). They were designed to minimise wear on the tooth fabric. They are mainly used on the latest generation diesel engines with high injection pressures. They guarantee maximum belt life on engines, withstanding temperatures up to 120°C/250°F.
  • HK: the latest generation product, equipped with aramid-based fibres for superior durability and silent operation. They can withstand temperatures up to 120°C/250°F.
  • BIO: timing belt designed to work in an oil bath. They withstand the action of additives and high engine oil temperatures.

Discover all the codes of timing belts by accessing our Dayco Catalog

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