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In V-Belts, angle of contact is a very inportant value. It states that the physical contact with belt and the sheave, as an angular value. For example, 150 degrees of angle of contact means that the belt sheave contact with v-belt in 150 degrees around its perimeter.
180 degrees of angle of contact means that the drive ratio is 1, and there is no power or torque conversion between shafts. Diameters of sheaves are equal. The formulae that angle of contacts are calculated;
As you can see above, the first and the second angle of contacts for each sheave in V-belts are calculated as θ1 and θ2. The input values of ‘D1’ and ‘D2’ are the diameters of sheaves. ‘D2’ must be the bigger sheave.
‘C’ value is calculated via an another formula. You can calculate the ‘C’ by using this calculator avaliable in Mechanical Base.
The use of angle of contact calculator for v-belt sheaves is very simple. You just need to enter the ‘D1’, ‘D2’ and ‘C’ values inside the input boxes. Then click on ‘Calculate!’ button to make calculation.
Take a look at other engineering calculators that are avaliable in Mechanical Base!
To re-use the angle of contact calculator for v-belt sheaves, just click on ‘Reset’ button, then re-enter the values.
A good engineer must take care about the units of the calculations. Proper set of units are very important. For ‘D1’ and ‘D2’ values, you need to enter length values. And output ‘θ1 and θ2’are the angles contact of each sheaves in v-belt system in terms of degrees.
To obtain a proper set of units, you can use the MB-Unit Converter tool to make conversion between units.
Mechanical Base does not accept any responsibility from the calculations done with its calculators. Again, a good engineer must check the calculations with hand calculations.
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