Formulae & Conversions

Basic Formulae

Belt Length on a Simple Conveyor (Head & Tail Pulley are the Same Diameter)

C = center to center distance (in inches)
D = diameter of drive pulley (in inches)
d = diameter of tail pulley (in inches)


Belt Length on a Simple Conveyor (When one Pulley is Larger than the Other)

C = center to center distance (in inches)
D = diameter of drive pulley (in inches)
d = diameter of tail pulley (in inches)


Length of a Belt in a Roll

L = length of belt in feet
D = diameter of roll in inches
d = diameter of core in inchest = number of turns of belt on roll
B = overlap of belt in feet


Diameter of a Roll of Belt (approximate only)

L = length of belt in feet
t = gauge of belt in inches
D = diameter of roll in inches

Common Conversions

1 kilogram = 2.2046 pounds
1 inch = 25.4 millimeters
1 lbf/in = .17513 N/mm
1 foot = 0.3048 meters
Temp Celsius = (5/9) x (Temp Fahrenheit-32)

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