In this Book we discuss Problems in Rotating disc by using Seth"s B. R. Transition theory. We discuss What is the effect of stresses having variable thickness and with edge loading.Rotating Disc having variable thickness with rigid shaft, It has been observed that in the absence of thickness, rotating disc with inclusion and made of compressible material yields at the internal surface at a lesser angular speed as compared to a rotating disc made of incompressible material whereas it requires a higher percentage increase in angular speed to become fully plastic. With the effect of variation thickness, higher angular speed is required to yield at the internal surface.When Rotating disc by finitesimal deformation with loading edge under steady state temperature,It has observed that for incompressible material required higher angular speed for initial yielding as compare to compressible material. With the effect of loading edge, lesser angular speed required for initial yielding as compare to without edge loading. With the introduction of thermal effect rotating disc with loading edge much required to lesser angular speed as compare to rotating disc without thermal effect.