Choose the type of rolling element bearings to support the rotating parts (not exact dimensions, just the type). Justify your choices Evaluate the diameter of the balls required such that the maximum Hertzian pressure in each contact is in the range 1.2 - 1.5 GPa. Take the traction coefficient of the oil 0.045, the average radius of the cage RC1 = 150mm and consider that there are 6 balls.