All I can figure is that it was a matter of alignment, that they were teeny teeny bits of slop in how the pieces fit together, and after putting it together about eight times I hit on the perfect combination.
It's in the machine now, and still turn smoothly! I have now, of course, a different problem. something electrical is going on. Maybe a crossed wire or something. The potentiometer that is supposed to control the motor speed is not doing so. It is full blast or nothing. A problem for tomorrow, but one that is back in the realm of my knowledge. Unlike the inside of the motor, which I know nothing about!
