Shaft sizing calculations

Hello All,

I am trying to determine what diameter of shaft I will need based on all the loads I know.  I have few bearings supporting the shaft,some sprockets and a drive sprocket ( provides torque) . I have to consider the weight of all the sprockets and I am using a force in Y direction to simulate the weight of the sprockets. any ideas how to proceed ??

Thanks.

Umang

SolidworksSimulation