Belts - Power Transmission and Efficiency

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

T = (F₂ - F₁) 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 = (F₂ - F₁) r_a ω_a                          (2)

where

P = power transmitted (watts)

ω_a = angular velocity (rad/s)