How to pronounce “ball bearing” in English

Then if I flick a ball bearing, the ball bearing, instead of going straight-- it will if it's far away-- if the sheet's sagging down here,

It's like a smooth ball bearing at the top of an endless incline, unless it is obstructed, unless it is made still, it will just keep rolling and rolling and

And I mean, the whole telescope is mounted on this giant ball bearing to keep it from being too susceptible to turbulence.

like a flat trampoline or a rubber sheet, and if I take a little ball bearing and flick it, it will go in a straight line.