A cold-rolled steel shaft is designed on the basis of the maximum shear stress theory. The principal stresses induced at its critical section are 50 MPa and -50 MPa respectively. If the yield stress for the shaft material is 400 MPa, what is the factor of safety of the design?

The dynamic load-carrying capacity of a radial bearing is defined as the constant radial load that the bearing can withstand for a rating life of how many revolutions?

If P = equivalent dynamic load, Fr = radial load, Fa = axial or thrust load, V = race-rotation factor, and X and Y are radial and thrust factors respectively, then the correct expression for equivalent dynamic load on a bearing is: