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Turntable platter for the 2008 Maxon group buy
Turntable platter for the 2008 Maxon group buy
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Old 20th July 2008, 03:54 PM   #11
yioryos is offline yioryos  Canada
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Join Date: May 2008
dnewma04, just a thought,wood can be affected with moisture and become unstable,and create problems ,I know Teres uses it for their platter but even they had to come up with some creative ideas to season it and machine it.I am confident that the Teres bearing could be used with thicker platters.
There is website that produces acrylic platters for Rega upgrates,they are ironaudio.com from Florida.I wonder if they can machine thicker platters.
George
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Old 21st July 2008, 10:04 AM   #12
dnewma04 is offline dnewma04  United States
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I do have some concerns about the wood platter, myself, but i'm going to give it a whirl and see what happens. It's cheap and easy to make.
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Old 21st July 2008, 11:18 PM   #13
yioryos is offline yioryos  Canada
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Update
I got a price for a 68mm acrylic platter for $700.Any thoughts?
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Old 22nd July 2008, 04:06 AM   #14
wirewiggler is offline wirewiggler  United States
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Join Date: Mar 2005
Location: Bakersfield Ca
Default platter

I have been giving it a some thought. I am concerned about resonate properties of the various materials. Acrylic is a proven product but its visual appearance does not appeal to me, and I am concerned with static build up in my area. Wood looks nice but concerned with shrinkage and warping. You could do like Teres and laminate pieces together with epoxy and cover outside.Stacking MDF is an option but I would think it would be soft and dead. Or one would mold a composite core with chambers for lead and then maybe cover the outside in wood. Again my concern arises as to the density of the composite epoxies. The last method appeals to me as it is very DIY-able. The mold could be made relatively easily using a router and stacking, epoxy is not difficult to work with and layup would not be to much an issue. Cutting carbon mat would be the challenge.

Bill
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Old 22nd July 2008, 04:07 AM   #15
dnewma04 is offline dnewma04  United States
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700.00 would be way out of my league.
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Old 22nd July 2008, 05:03 AM   #16
wirewiggler is offline wirewiggler  United States
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Oh yea and $700 is more than I could afford. Evan a decent bearing is a bit much. Maybe Start a group buy on the bearing first?
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Old 22nd July 2008, 01:37 PM   #17
dnewma04 is offline dnewma04  United States
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I'm following up on a lead on an acrylic platter similar to the Teres and I'll report back when I get more info.
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Old 22nd July 2008, 02:27 PM   #18
d to the g is offline d to the g  United States
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You guys might also want to contact diyaudio member nanook. I believe he was trying to do a platter+bearing groupbuy that pegged in less than $450 for the pair.
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Old 22nd July 2008, 11:40 PM   #19
yioryos is offline yioryos  Canada
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My thoughts.Buying the acrylic plate at 13"x13"x3" is roughly $200 as member Kilowattski pointd out.Now be aware that I was not able to locate on the net a place that sells acrylic at that size.Mcmaster.com has them at 12"x12"x3" or next size up 18"x18"x3" with a significant price increase.I assume that a good machinist could work with a 12"x12"x3" piece and gives you a platter slightly under 12 inches diameter,given the fact that Mcmaster oversizes their acrylic by one sixteenth,so it's actually 12-1/16"x12-1/16"x3".Not much room for errors thought!
Now how much a machinist wants to turn that piece?Will it be true and smooth?
The price I mentioned was for a 2-3/4" acrylic platter from Clearaudio.Yes it is not cheap but
to me it seems like a decent deal .
Any other options,thoughts I am open to opinions,suggestions and most of all guidance.
Pixelplay what do you say?
George
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Old 23rd July 2008, 07:55 AM   #20
PixelPlay is offline PixelPlay  Australia
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Well, I have been looking into the Scheu option, they have platters 320mm,
30mm / 2,7kg 185.-
50mm / 4,5kg 275,-
80mm / 7,5kg 535,-

The attached information is in German.

Lets see what they can do for the platter and bearing.

Here is the translated German:
"Acrylic plates 320 mm diameter, with different heights,
Teller surface plan. 20H7 bore resources for maximum precision round and
Runout shot. All surfaces sauberst feingeschlichtet. Individually on
Dimensional accuracy.
30mm / 2.7 kg
185 --
50mm / 4.5 kg
275, --
80mm / 7.5 kg
535, --
Platter stock
Inverted precision bearings from 100Cr6 steel ball bearings. Axis and jack
vorgedreht, hardened and ground. Surface about 60 HRC.
Surface roughness of the 4th paragraph Axial storage
Alumina ceramic ball and Teflon mirror. Lagerpassung H6/h6. All
Parts examined individually. Suitable for all Scheu plate.
250, --"
Attached Files
File Type: pdf preisliste.pdf (89.0 KB, 60 views)
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