Angular Contact Bearings for Belt Driven Screws

[JAZZCNC]

As a novice, what am I looking for to confirm the presence (or not) of AC bearings in my BKs?

Suggest you do a search for AC bearings and look at how they visually differ from standard Deep grove bearing. The visual clues when in your hand are the inner and outer races will have a thin edge and a thick edge. The inner race thin side will always face the Outer races thick edge. They will also come apart if you push on them.

Also, do a search on the forum because there's been many people show the BK bearings stripped down and will explain how they need to be assembled correctly.

Edit: Obviously if there is a number on the bearing this will ID the bearing type but often you'll not see this without stripping the BK block down.