# Belts - Power Transmission and Efficiency

## Calculate belts power transmission and efficiency

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The torque available at the driven wheel or pulley (*a)* can be expressed as

T = (F_{2}- F_{1}) r_{a}(1)

where

T = torque (Nm)

F = force (N)

r = radius of wheel or pulley

The available power can be expressed as

P = T ω_{a}= (F_{2}- F_{1}) r_{a}ω(2)_{a}

where

P = power transmitted (watts)

ω_{a}= angular velocity (rad/s)

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- en: belt transmission power efficiency
- es: eficiencia de potencia de transmisiĆ³n de la correa
- de: Riemengetriebe Energieeffizienz