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In Reply to: RE: Why turntable bearing shaft and spindle machined as one piece? posted by caligari on October 23, 2016 at 10:16:12
John Ellison- After all, the bearing is spinning at only 33-1/3-rpm and can be made to operate basically noise free.
Caligari- Seriously, what really bothers me is that these so called "high end" or perfectionist manufactures keep talking about attention to details and yet (leaving the motor out of this equation for now) they don't address the source of the noise, the bearing that is a moving part!
I include part of the above, as I have thought and had read in other posts that the bearing and shaft are not moving/spinning but remain stationary- the platter is spinning on the stationary bearing. My VPI Super Scoutmaster bearing, for example, is fixed securely to the spindle and the bearing spindle is bolted to the plinth.
Follow Ups:
> My VPI Super Scoutmaster bearing, for example, is fixed securely to the spindle and the bearing spindle is bolted to the plinth.
Are you suggesting that the platter spindle on your VPI Super Scoutmaster bearing does not spin with the platter? I can't imagine that VPI would design their turntables like that!
What you are describing is called an inverted bearing when the bearing shaft is bolted to the plinth and the bushing and thrust-plate are connected to the spinning platter. My Sota Millennia is designed this way but its spindle is connected to the spinning part of its bearing and spins with the platter.
I think the spindles on VPI turntables are also connected to the spinning part of the bearing so they spin with the platter. Am I wrong? Does the spindle on your VPI actually remain stationary as the platter spins? I can't imagine that would be good! On the contrary, I think it would generate noise as the record turned against a stationary spindle. My Sota Millennia is definitely not designed like that. It's spindle is connected directly to its platter and spins with the platter.
Best regards,
John Elison
John, Yes, the bearing shaft/spindle is bolted directly to the plinth, and the ball bearing is press-fitted into the end of the shaft, where the platter then goes over it. The shaft and bearing are stationary. Harry made a special oil-pumping feature for me in the platter for the inverted bearing. The entire operation is very quiet with black background. The platter is controlled by rim-drive off the HRX double motor and sounds great with the 3D arm and Lyra Titan-i cartridge. I also use the Phoenix Engineering Eagle and RoadRunner.
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