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Specific Tension Ratio of V-Belt Drive

  1. Apr 1, 2014 #1
    In a V-Belt Drive, it is said that when a New Belt is installed, the Tension Ratio shouldn't exceed 5:1. But isn't this ratio beyond control and is defined by T1/T2 = μ*α*cosecβ where T1/T2=Tension Ratio, μ=Coefficient of Friction, α=Angle of Wrap, β=Groove Angle of V-Belt. All of these variable are constant for a particular drive so how can a specific Ratio be maintained?
  2. jcsd
  3. Apr 1, 2014 #2


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    Your formula gives the maximum value of T1/T2 when the belt starts to slip.

    The actual values of T1 and T2 depend on the power being transmitted be the belt, the RPM, the diameter of the pulleys, etc.
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