[QUOTE="Craig B, post: 3276111, member: 36"
To which I would reply, asking the maker why he has seen fit to use a Delrin thrust plate at the bottom of his own make bearing sleeve for use with his captive ceramic ball spindle.
On a separate note, and without wishing to be critical of the maker's sub-platter assemblies, which look beautifully turned out btw, I think it disingenuous of him to demonstrate them from the perspective of how long they spin freely with no platter on top. That tells us nothing about the change in the mechanical closed loop brought about by switching to a super-hardness ball on plastic thrust pad; what we used to call an 'engineering solution negation'. Also, closed loop theory demands hard metal to metal, or ceramic to ceramic, at the critical minimal pivot point. Also his, 'no metal to metal contact' argument for using Delrin sleeves and pads is a red herring, as a properly lubed Rega spindle/bearing essentially runs on a thick film of gear oil, which in hydrology is known to be just as stiff as solid.
Yes, I suspect the ceramic ball to last until the earth gets sucked into a black hole as partial fuel for the next big bang in the infinite series of big bangs, especially so, if you go for the full-Monty captive ball on Delrin pad.
Unfortunately, with just the ceramic ball in, my OCD would have me pulling my Rega hub out and examining the spindle end with a magnifying glass, many times per year, until death do us part!
Thanks for the reminder of what this thread was originally about. I'll have a re-read of your earlier postings and possibly offer some more constructive help.[/QUOTe
I did ask 3pmengineering if the version of the subplatter/bearing he has for sale includes any Delrin thrust pad as shown on one of his YouTube vids but it does not, this is just the plain sleeve version in fact. He also states the spin demo shown in the vids is just to give an idea of the quality of the fit so not disingenuous at all rather quite honest it and would seem. Anyway enough of this closed loop thread for me now, quite illuminating.
To which I would reply, asking the maker why he has seen fit to use a Delrin thrust plate at the bottom of his own make bearing sleeve for use with his captive ceramic ball spindle.
On a separate note, and without wishing to be critical of the maker's sub-platter assemblies, which look beautifully turned out btw, I think it disingenuous of him to demonstrate them from the perspective of how long they spin freely with no platter on top. That tells us nothing about the change in the mechanical closed loop brought about by switching to a super-hardness ball on plastic thrust pad; what we used to call an 'engineering solution negation'. Also, closed loop theory demands hard metal to metal, or ceramic to ceramic, at the critical minimal pivot point. Also his, 'no metal to metal contact' argument for using Delrin sleeves and pads is a red herring, as a properly lubed Rega spindle/bearing essentially runs on a thick film of gear oil, which in hydrology is known to be just as stiff as solid.
Yes, I suspect the ceramic ball to last until the earth gets sucked into a black hole as partial fuel for the next big bang in the infinite series of big bangs, especially so, if you go for the full-Monty captive ball on Delrin pad.
Unfortunately, with just the ceramic ball in, my OCD would have me pulling my Rega hub out and examining the spindle end with a magnifying glass, many times per year, until death do us part!
Thanks for the reminder of what this thread was originally about. I'll have a re-read of your earlier postings and possibly offer some more constructive help.[/QUOTe
I did ask 3pmengineering if the version of the subplatter/bearing he has for sale includes any Delrin thrust pad as shown on one of his YouTube vids but it does not, this is just the plain sleeve version in fact. He also states the spin demo shown in the vids is just to give an idea of the quality of the fit so not disingenuous at all rather quite honest it and would seem. Anyway enough of this closed loop thread for me now, quite illuminating.
