Anyone interested in an improved SL1200 main platter bearing?

Posted by tubesforever (M) on May 18, 2009 at 00:12:00

I am square dab in the middle of rebuilding a friends SL1200 main bearing with a ceramic ball interfacing a mirror polished, super hard surface.

Here is a picture of the worn down stock machined steel surface Technics runs on the business end of the main platter bearing. This probably represents about 25 years of happy spinning time.

The thrust surface is an interesting material. I am not sure if it is a tough graphite impregnated plastic, a sintered metal piece, or some yet to be disclosed gem of Technics engineering.

What I can tell you is that this old bearing is shot! The ball is flat and the thrust plate is worn down a great deal. There is so much friction on this thing there is no way you can hear deep dark backgrounds or low level details. These are all masked by resonance.

More to follow....I might not be able to get this done for a while. I have to order and process the parts. Then I have to arrange some lathe time. I doubt I can get to this until after Muzikmikes Ribfest.

Here is a look at the bearing assemby. The plate with the worn disk interfaces to this bearing piece and the other side is the spindle and platter engagement.

When done it should be able to deliver a good deal of the deep dark backgrounds and inner detail my Rek O Kut bearings achieve.

I would like to do 4 or 5 of these for a trial just to see how they effect SL1200 tables in different asylum inmate's systems.

Cheers!
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Topic - Anyone interested in an improved SL1200 main platter bearing? - tubesforever 00:12:00 05/18/09 (18)

Tubes, I have an old SL-1200 spindle bearing lying around. - Ugly 11:14:39 05/19/09 (0)

RE: Anyone interested in an improved SL1200 main platter bearing? - Panelhead 19:51:49 05/18/09 (0)

A word of warning regarding spherical thrust bearings - Mark Kelly 17:49:46 05/18/09 (7)

RE: A word of warning regarding spherical thrust bearings - Ugly 11:26:52 05/19/09 (2)

As I understand it - Mark Kelly 14:54:50 05/19/09 (1)

Thanks. - Ugly 15:59:05 05/19/09 (0)

Translation for the non-technically minded: - Mark Kelly 20:42:38 05/18/09 (3)

RE: Translation for the non-technically minded: - d to the g 20:35:41 05/20/09 (0)

Translation for the obviously technically minded. - Mark Kelly 22:21:33 05/20/09 (0)

Language T4 can understand.... - tubesforever 23:30:06 05/20/09 (0)

RE: Language T4 can understand.... - d to the g 08:45:07 05/21/09 (0)

Polishing in my application.... - tubesforever 11:01:08 05/21/09 (0)

Ignore this if you wish to do so.... - tubesforever 22:38:12 05/18/09 (1)

Try again. - Mark Kelly 23:03:29 05/18/09 (0)

RE: Anyone interested in an improved SL1200 main platter bearing? - telewacked 16:15:44 05/18/09 (0)

I would offer mine up for you, Jim... - JimK 05:47:52 05/18/09 (6)

Look forward to seeing you Jim! - tubesforever 11:05:59 05/18/09 (5)

Are you going to be using - Muzikmike 11:47:09 05/18/09 (4)

Their are a lot of ceramic bearing materials to select from.... - tubesforever 22:53:00 05/18/09 (3)

No it wouldn't - Mark Kelly 15:37:54 05/19/09 (2)

The reasons to improve it.... - tubesforever 19:47:38 05/20/09 (1)

RE: The reasons to improve it.... - d to the g 20:41:02 05/20/09 (0)

RE: The reasons to improve it.... - tubesforever 23:34:22 05/20/09 (0)

Anyone interested in an improved SL1200 main platter bearing?

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