Could someone help shed some light on the correct orientation of AC bearings?
I thought I had a handle on it, but iv just come to install some pulleys and iv spotted iv got some face to face, and some back to back, so now I think i must have misunderstood something.

My current understanding it face to face is the preferred orientation and to preload them to remove any backlash I shim the outer race.
Face to face is with the larger inner race face pointing towards each other?

A second opinion on this would be great!