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

Perhaps the question to ask is with a precision machined bearing setup, is there enough "noise" to be audible? A cartridge is a transducer, not a microphone, so the only way it can transmit an electrical signal is when its' magnetic field is altered by means of stylus/cantilever movement. So in this case, "noise" can only manifest itself as the result of vibration (assuming the LP itself isn't moving around), and I question whether there is enough vibration caused by any higher-end turntable bearing to even be audible. I would think vibrations external to the bearing (structural, airborne, etc) would have a much more significant impact than whatever vibration comes from the bearing, especially with the miniscule contact area between the records center hole and the spindle.

Just my $0.02...

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