You can refurb your old bearings and they will be slicker than snot on a marble floor! Here is how you do it:
1. Buy some 400 and 800 grit wet dry sand paper.
2. Cut it up in 2" x 5 1/2" strips.
3. Wash your bearings in some strong detergent in hotwater. Use a brush to remove all the gunk in the grove.
4. With one hand pinch the sandpapper arround the end off a rod where the rough surface is facing outward. With the other hand sand the inside of the bearing until you get most of the surface scratches out. Sand with the 400 grit first then finish with the 800 grit.
5. Buy some buffing wheels and arbor for your Dremel.
6. Go to Lowes and buy some plastic polishing compound that comes in a cardboard tube.
7. With the Dremel on about half speed apply the compound to the buffing wheel and polish the inside of the split bearing flange. You will see the scratches slowly disappear.
8. Be extremely carefule not to to press to hard or run the Dremel to fast or you will blister your bearings!
9. Wash the bearings again in detergent and hot water to remove polishing dust.
10. Let dry and reassemble.
The rods will have just a little slop in them so tighten them real good. You will notice when sanding, every bearing has the same defect on the bearing ridge. Do not try to sand it completly out, there is no need to.
I will post some pics later.
good luck
Defect in every bearing
Bearing before sanding
Dremel with Buffing wheel and Polishing compound.
Un-Sanded / Sanded to 1200 Grit / Polished
My table