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Velocity Ratio of Compound Belt Drive given Product of Diameter of Driven Calculator

Formula

The formula to calculate the Velocity Ratio of Compound Belt Drive is:

$i = \frac{P_1}{P_2}$

Definition

Velocity ratio is the distance through which any part of a machine moves to that which the driving part moves during the same time. Product of diameters of drivers is the value obtained after the multiplication of all the diameters of the driver pulley. The product of diameters of drivens is the value obtained after the multiplication of all the diameters of the driven pulley.

Example Calculation

Let's assume the following values:

Product of Diameters of Drivers (P1) = 40
Product of Diameters of Drivens (P2) = 60

Using the formula:

$i = \frac{40}{60} = 0.666666666666667$

Conversion Chart

Product of Diameters of Drivers (P1)	Product of Diameters of Drivens (P2)	Velocity Ratio (i)
30	60	0.500000000000000
35	60	0.583333333333333
40	60	0.666666666666667
45	60	0.750000000000000
50	60	0.833333333333333