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RE: Why turntable bearing shaft and spindle machined as one piece?

Lew: "So, how would you effectively decouple the spindle from the bearing, in a world where gravity is "the law"?"

Make the spindle part of the platter but not the bearing shaft? The kind that has a sub-platter is rather easy. For example, look at the video below of the Bergmann turntable. I hope it illustrates my point.

That also brings me to an observation about Lenco users adding another platter on top reported positive result is partly because of the decoupling of the spindle from the bearing. Similarly some German users like adding an acrylic platter on top of a Micro-Seiki turtable may have similar benefit.


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Lew: "Other than maglev, what do you suggest?"

Mag-lev is a good way to lessen the mass of the platter (Continuum does that) but I think most still have the bearing bottom end touching the thrust pad instead of floating that might affect VTA. I saw a video of a Clearaudio mag-lev bearing that the platter can be pushed down and spring back up when released. Not sure if that's vertically stable when playing a record. It might. I don't know.

Airbearing is completely isolated. Whether that thin layer of air is rigid enough to not have vertical movement is up for debate. I'll leave that to the airbearing experts.



Edits: 10/24/16 10/24/16
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