Evaluate power transmitted by shaft:
How do you evaluate power transmitted by shaft (P)?
Sol.: Consider force 'F' Newton's acting tangentially on shaft of radius 'R'. If the shaft because of this turning moment (F X R) starts rotating at N rotation per minute then.
Work supplied to shaft/sec = F. Distance moved/sec.
= F.2 .R.N/60 Nm/sec
or,
Power (P) = F.R.2 .N/60 Nm/sec or watt. But F.R = Max. Torque (T) in N-m
That is P = 2 .N.T_{max}/60 watts