Homebrew PCBs

@adam on more question to tapered roller bearings:

are they "encased" by the bearing shells like thrust bearings?
so that they are ready to use?
i saw some on the web but they had the case rings like standard ball 
bearings.
so it is difficult to mount them by plates at the side.
the angle of the rollers was only a few degrees off parallel to the axle.
which one do you have?
maybe i'm looking for the wrong type - are your bearings similar to thrust 
bearings?
which angle has the center of the rollers?
are they more parallel to the axle or more in a right angle to it?

thanks
st