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First Calculate Torque - (Torq) in inch-pounds
You need to know:
(M) - Maximum Roll diameter in inches
(WW) - Web width (material width) in inches
(Ten) - Tension in PLI (pounds per linear inch)
Formula
Torq =(M/2) * (WW) * (Ten)
Example
Torq = (26"/2) * (42") * (2 PLI)
Torq = 1,092 inch-pounds
Next calculate Heat Dissipation (HD) in horsepower
You need to know:
(Torq) - Torque in inch-pounds
(RPM) - RPM in revolutions per minute
Formula
HD = (Torq) * (RPM) / 63,025
Example
HD = (1,092) * (100) / 63,025
HD = 1.73 Horsepower
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