Pin, all good points! Thanks for the reply!
It has been my understanding that the small ball bearing is only a 'catch bearing '. The hydro dynamic concept used by Michael slightly lifts the platter onto a thin film of oil, and off of the balls contact surface. It ( the ball) comes into play when the platter is at rest. Hence the name, catch bearing!
I have and do examine the flat area on the spindle ' post' for any marks ruled unusual, with a good magnifying glass, and so far so good...