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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
Hi Caligari,
I think a simplistic answer to your question would be that, typically, fewer parts means lower costs when manufacturing anything, be that a pair of roller skates or a turntable, low or high end.
Making the bearing shaft and spindle from a monolithic turning is easy to do using very common manufacturing methods. Separating the spindle from the rest of the shaft/bearing body introduces some extra pieces and would require some precision to ensure the centers were concentric and parallel.
That's not impossible, of course, nor super costly, as it's done quite commonly for all manner of mechanical devices.
The next question becomes that of cost/benefit. Hard to say if manufacturers have tried other options and come back to the monolithic approach, that they're able to satisfy market requirements with the monolithic approach and see no need to change, or they just haven't tried.
Maybe you could be the one to advance the leading edge here...
Follow Ups:
Thank you for your post. That's the type of comment I enjoy reading. I am not a turntable maker but if I am I would implement those ideas.
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! They keep adding thickness to the platter and yet that damn spindle is protruding all the way up to be in contact with the record! And as you said, it shouldn't even cost that much but they don't address it and will probably say it's not that important. If I can afford a 6-figure table, I ain't buying one that doesn't address that issue, period.
Thanks again for your comment.
IF so concerned?
Ream out your LP centers and fit a bit of silicone ring/tube as an Isolator so the lp never directly contacts the spindle..
IF the LP has no direct contact to the spindle the Problem(?) is moot.
Edits: 10/23/16
and put a silicon rubber tube over it? On the other hand i do nto think it is a huge source of noise in a high end TT. Maybe there is more to be gained from the mechanical grounding a well designed thrust bearing affords. After all you loose more resolution beating against a spongy bering than a solid one.
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
My Xerxes X has a removable plastic (some were aluminum) cap which fits over the spindle. Once the record is on the platter, the cap is removed for play. The pictures above show what it looks like with the cap removed.
I'll be honest, and say the closest I ever got to hearing a difference with or without the spindle cap was a "maybe". And when the best I can do for any change, tweak, wire, etc. is a "maybe", I consider it a "no".
I play my records with the spindle cap in place, and call it good.
'Ow many ha' you reamed like thi'?
bare: "Ream out your LP centers and fit a bit of silicone ring/tube as an Isolator so the lp never directly contacts the spindle..."
Clever. I like the way you think. :)
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