Two shafts are connected by a rigid coupling, which is basically a shrink$-$fit bushing with an outer

diameter of $120$ mm $.$ The diameter of each shaft is $80$ mm and the diametral interference was $=80$

$m$ before the shrink$-$fit bushing was mounted. The bushing and the shaft are made of steel with a

modulus of elasticity $E=210$GPa. Find the allowable temperature increase without slip in the press fit

if a power of $200$ kW is transmitted and the far ends of the shafts cannot move axially. The coefficient

of thermal expansion is $11\mathrm{.}5\frac{{10}^{-6}}{}C,$ and the coefficient of friction is $0\mathrm{.}1.$ The axial length of the

bushing press fit on each shaft is $80$ mm $.$ The rotational speed is $1500$ rpm $.$ Ans. $t_m=63\mathrm{.}29C.$