SCALLOP SHAPED OIL INLET ROTOR SHAFT DESIGN FOR MOTOR AND BEARING COOLING

A lubrication distribution system comprising: a shaft comprising a scalloped shaped portion including a plurality of scalloped recesses configured to receive fluid and distribute the fluid to bearings of a traction motor, where radii of the scalloped recesses vary; and a plurality of distribution holes positioned proximate a circumference of the scalloped shaped portion.