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radial force on pulley
2

radial force on pulley

radial force on pulley

(OP)
I am interested in determining the radial force on the contact surface of a pulley and a flat belt under static tension.  Can't find anything in the handbooks.  Appreciate any information available.

RE: radial force on pulley

If the pulley is truly static, then the radial force is twice the belt tension.

If the pulley is rotating under load, then calculate torque  associated with load (T = 5250*P/N where T in ft-lbf, P in hp, N in rpm) and convert torque to force based on pulley diameter, and multiply be a belt factor.


Here is a reference with belt factors for various configurations.  You may find some lower numbers in other references (I know many people use 1.5 -2.0 for Vee belts)
http://www.nskf-bearings.com/bearingshandbook/bearingsLoads_Life/Belt_or_Chain_Transmission_Applications.htm

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RE: radial force on pulley

Quote:

convert torque to force based on pulley diameter
Maybe that was misleading. Let me try again:

Quote:

convert torque to force based on pulley radius

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RE: radial force on pulley

(OP)
Thanks electricpete...to clarify, I meant the belt force was constant but the pulley is in motion.  You got me covered.

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