Diagram shows an aluminum shaft A B with a support at A, marked 1 of length 2,000 millimeters and a brass shaft B C with a support at C, marked 2 of length 800 millimeters with a flange in between at B. The shafts are centered on the x axis. A torque T is applied at B.

For bronze shaft (2):

L2=800 mm
G2=38 GPa=38,000 N/mm2
J2=3,106,311 mm4

Rearrange the torque-twist relationship for shaft (2) to solve for T2:

T2=ϕ2J2G2L2
=(-3˚)(π rad180˚)×(3,106,311 mm4)(38,000 N/mm2)800 mm
=-7,725,688 N-m =-7.73 kN-m