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Old 26th February 2009, 10:50 PM   #1
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Default Well Tempered platter bearing?

was talking to Nanook about this but I have lost the drawing i had of it. Does anyone here have a drawing of the Well Tempered Turn Table platter besring assembly? Thanks.
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Old 27th February 2009, 01:29 AM   #2
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Here's the original patent:

http://www.freepatentsonline.com/4792938.html

Sign in and you can download it as a pdf including the drawings. It's a start.
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Old 27th February 2009, 01:58 AM   #3
AVWERK is offline AVWERK  United States
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Go to welltemperedlab.com

You can buy it for 215 clams

The 4 teflon pad solution is interesting.. but I don,t believe this design would work well with a heavy DIY platter if someone might roll there own. His platter assembly was light weight to allow the pull by the motor/belt assembly with the resultant zero tolerance bearing idea he was shooting for.

There,s not enough surface area involved and the thought that even teflon actually touching the shaft on rotation would or could lower noise compared to the traditional larger oil film distribution solutions seems remote. My speculation only on this.

His arm was a true original though.

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David
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Old 27th February 2009, 05:28 AM   #4
Nanook is offline Nanook  Canada
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Default Moray, thanks for the links....

I had seen this previously.

As far as I can see it, it appears to provide lateral Teflon pads, and a vertical "thrust" pad or ball to support the weight.

I've basically come to the point where the main bearing can easily just be a single ball riding on a Teflon pad, if the lateral bearing is of sufficient quality and precise enough. Using custom machine Super-Oilite bushings is appropriate and has worked to good effect.

stew
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Old 27th February 2009, 02:21 PM   #5
jpo is offline jpo  United States
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The new Well Tempered Amadeus turntable has a different bearing arrangement. It has three points of contact instead of five, and no pads.

The upper bearing is once again based on the V-block principle. Instead of pads, however, the spindle is pushed by the belt toward the corner of a square hole in a Teflon bearing. The lower bearing is much other turntables, consisting of a point in the bottom of the spindle resting on a thrust bearing.

Yes, a picture would be worth a thousand words, but I don't know of one. The instruction manual for the turntable shows the parts, and it's available at www.welltemperedlab.net.

The arm, by the way, is also different, although it works according to the same principles as the original.

JPO
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Old 28th February 2009, 02:53 AM   #6
Nanook is offline Nanook  Canada
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Default er, your link...

is wrong (I got re-directed to Tivoli, a nice place to visit but not where I wanted to go--I already have a Model One ).

the correct one is here ...or another is here
Changing the design by what can be deemed "significant" is enough to put the patent back into effect. I am sure Bill Firebaugh has plenty of the grey stuff between his ears to ensure that.

stew
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Old 28th February 2009, 10:28 PM   #7
jpo is offline jpo  United States
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Default Sorry about that!

And thanks for making things right!

I had the latter link in mind, by the way.

JPO
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Old 1st March 2009, 06:24 AM   #8
Nanook is offline Nanook  Canada
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Default jpo...no prbs , mahn...

no apology required. Just thought I'd "help out" and post a couple that would get folks close...

The bearing is a round spindle in a square well, it really does seem pretty simple, and ingenious--aren't all the great things "simpler"?

stew
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Old 11th April 2009, 05:24 PM   #9
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Well I think this round in square approach is about the only way one can make a diy bearing with sufficient precision without special tooling.

I did something like that in my scrapyard turntable by fitting a prepared teflon sleeve (with defined touch-pints) in a thorens 10 mm bearing and using a subplatter with a 8 mm spindle. Not entirely diy but it proves the concept very well.

MArco
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Old 12th April 2009, 03:46 AM   #10
fergs1 is offline fergs1  Australia
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Since the bearing relies on side thrust to seat the spindle it might be interesting to try an idler arrangment rather than a belt pushing on instead of pulling on the side of the platter.Its funny how this forum works because I have just been thinking of this as a solution and pondering the willy firebourough bearing and this tjread pops up.No doubt with the release of the new armadeus but on a whole i have been a big fan of his thinking for a good while. Hes a true original, god bless him
cheers fergs
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