[simplechamp]

1. Not sure

2. I wouldn't lubricate it at all externally. It will come lubricated already and adding oil will just soak up dirt from the outside and bring it into the bearing, possibly contributing to the quick wear you experienced. Just keep the outside clean and free of dirt after running.

3. No they shouldn't, see #2

4. You can roll up some thin cardboard into a tube to protect the windings during rotor removal and installation.

5. The ABEC is usually low, like 1 or 3. You don't need super high precision bearings for these applications. In fact lower is sometimes better because the tolerances aren't as tight so they can handle getting a little dirty or dusty better.

That was the longest quick question ever LOL.