TourTour Differential Band Brake
Metal V-belt >>
 Torque M = P/ω, ω=2πn/60 Nm
 Drum radius r 10-3 m
 Wrap angle α deg.
 Coefficient of friction μ   -
 Lever ratio b1/b2 -
 Lever ratio b2/a -
 Brake force T1-T2 = M/r N
 Ratio of belt forces T1/T2 = exp(μα) -
 Belt tension load T1 = (T1-T2)/(1-T2/T1) N
 Belt tension load T2 = T1 T2/T1 N
 Bearing load Fa N
 Actuating force Fi = (T2 b2 -T1 b1)/a N