What is belt drives

  • One-third populations of motors in industrial and commercial sectors include belt drive as it avoids transmission loss.
  • Increase decrease in the speed of the drives equipment is achieved with pulleys of various diameters.
    A well-designed belt transmission offers:

    1. High efficiency
    2. Less noise
    3. No need of lubrication
    4. Required less maintenance

    Some types of belts of various types give efficiency and energy saving higher than other. They are,

    1. V-belts
    2. Cogged belts
    3. Synchronous belts
Belt drives

Belt drives


  • Most of the belt drive employs v-belts.
  • Improved power transferability in a v-belt is a result of the trapezoidal cross-section.
  • v-belt drives may give efficiency near about 90% at the time of installation.
  • The efficiency of v-belts may drop by 5% over time.

Cogged belts

  • Cogged belts include slots which run perpendicular to the belt through the length.
  • These slots provide the advantages of reduced bending resistance of the belt.
  • Cogged belts with a rating equivalent to v-belts can be used with the same pulley.

Synchronous belts

  • Synchronous belts have toothed structure and mating toothed drive sprockets on which they run.
  • These belts are efficient about 98% which is maintained over wide load range as well.

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