V-groove bearings

[2muchstuff]

Are the Bishop-Wisecarver V-groove bearings a one piece bearing or 2 pieces when put together forming the groove. The reason for asking this is over the weekend I went scrounging and found 13 of these bearings on an offset mounting post. Of course I also came home with a bunch of other things too, Igus chain, bipolar steppers with hybrid driver modules....... just wondering.

[ynneb]

One piece.