Same bearing as in the larger SME 30, which has a much heavier platter, so no, no damage. I have a Bob Benn clamp for the SME 20, but that can be used with any table whose platter does not exceed the diameter of the record. I found it gave a much more stable, deep soundstage than without and eliminated any vestiges of vinyl resonance. I have an SME 30 now that it doesn't fit, so I will be selling it.
On the SME 20, the spin up time is not particularly effected and the clamp weighs about 4 lb.
On the SME 20, the spin up time is not particularly effected and the clamp weighs about 4 lb.