BeoGram

Re: Beogram 4000 bearing disc replacement

chartz — Sat, 12 Feb 2011 05:03:53 GMT

Hi Martin,

Yes there is a hole at the bottom of my Beogram 8000 shaft. Its bearing is of very high quality and the platter will rotate for AGES when launched by hand! Not so the end of production Beogram 4000 like mine. It is a pretty machine ruined by a poor bearing. It is quite a contrast to the one shown here by Olly! It is noisy. Of course you can't really hear it unless you stick your ear to the plinth, but it is here (motor and belt off, and no, nothing rubs!). I used Mobil One for the bronze insert and teflon grease at the bottom, because an oil bath leaks and my shelf will look like a garage floor!

No hole at the bottom, no.

Re: Beogram 4000 bearing disc replacement

Dillen — Fri, 11 Feb 2011 13:38:54 GMT

The Beogram 8000 series has a tiny hole at the bottom of the brass part where a tiny screwdriver
or similar can be inserted to push the insert upwards.
I don't know if the Beogram 4000 has the same.

Martin

Re: Beogram 4000 bearing disc replacement

chartz — Fri, 11 Feb 2011 10:08:34 GMT

It just won't go. But anyway, I'll wait till I find a suitable replacement.

Thanks for the suggestions!

Re: Beogram 4000 bearing disc replacement

Step1 — Fri, 11 Feb 2011 04:05:14 GMT

How is it stuck in Jacques? Force fit or glued? You could use a stick of wood and carefully try knocking it out...?

Re: Beogram 4000 bearing disc replacement

Søren Mexico — Thu, 10 Feb 2011 20:59:31 GMT

chartz:

Dillen:

What is the diameter and thickness of the nylon insert ?

Martin, I can't get it out of the shaft. But it should be about 1 mm by 10 mm or thereabouts.

Try to drill up the hole to 2.5 Mm, force a 3 Mm screw into the hole and pull.

Re: Beogram 4000 bearing disc replacement

chartz — Wed, 09 Feb 2011 10:32:19 GMT

Dillen:

What is the diameter and thickness of the nylon insert ?

Martin, I can't get it out of the shaft. But it should be about 1 mm by 10 mm or thereabouts.

Re: Beogram 4000 bearing disc replacement

chartz — Wed, 09 Feb 2011 10:26:58 GMT

Alright, they do have it, but it is not possible to have it machined (too soft). The smallest thickness is 1 mm. The guy advised Nylon instead, because it has to be pierced!

Re: Beogram 4000 bearing disc replacement

Dillen — Wed, 09 Feb 2011 10:26:50 GMT

What is the diameter and thickness of the nylon insert ?
I had some made for the Beogram 6006/8000/8002 where I've replaced many.
(It breaks when the Beogram is shipped with the platter mounted).
The idea of having some made for this one is not impossible.

Martin

Re: Beogram 4000 bearing disc replacement

chartz — Wed, 09 Feb 2011 10:15:54 GMT

Ah yes, not far indeed. I know Balan and Dagneux. They are on the motorway to Lyon. Actually, the motorway is one and a half mile from where I live!

Thanks, I'll give them a ring.

Re: Beogram 4000 bearing disc replacement

burantek — Wed, 09 Feb 2011 10:01:57 GMT

chartz:
Tivar seems indeed very interesting.

The French distributor is about 1/2 hour from you, outside LYON.

Call and ask for some engineering samples -they will *probably* send some off for free -and surely more than you will need.

Quadrant EPP France SAS

ZI Front de Bandière - BalanBP 80020, 01122 Dagneux Cedex

Phone +33 (0) 472 93 18 00

Re: Beogram 4000 bearing disc replacement

Søren Mexico — Wed, 09 Feb 2011 09:49:04 GMT

I have been using a product called Polyamid (also called Nylamid) for making small bushings and small gear wheels, there are 2 types of this product, white for lubricated positions, and black self lubricating, its easy to work with and comes in a lot of different shapes, cylindrical (shafts) and rectangular bars, in a lot of dimentions. As this bearing is lubricated I recommend the white type.

Re: Beogram 4000 bearing disc replacement

chartz — Wed, 09 Feb 2011 09:36:21 GMT

burantek:

Both of my 4000's are identical to Olly's pic.

Crappy Beogram 4000 for sale!

With some plumber teflon at the bottom, it is silent.

Even if I could find a suitable disc, I can't remove the old one at all. It seems to be gued in place.

Tivar seems indeed very interesting.

Re: Beogram 4000 bearing disc replacement

burantek — Wed, 09 Feb 2011 08:51:48 GMT

Both of my 4000's are identical to Olly's pic.

chartz:
- why did B&O use the inferior bearings?

Well, unless there was a rolling production change, perhaps your BG was "serviced" at some point and the bearing replaced -but I can't see much to go wrong in this department as they are very robust. So, I guess stocks must have dropped towards the end of the run and they used what they had inbound for the 4002/4?

chartz:
- does anybody know someone able to produce new discs, possibly better ones?

Short of extracting the existing disc, it would all be guessing. In my enginerding days, I had great success w/ a product called TIVAR, some of which was teflon/oil/lube impregnated. As I recall, you can source it in disc form (we called them poker chips) called "weld washer caps" or similar. It can be processed w/ metal working tools.

Before I keep blabbing on... I'll see if I can find a link.

OK... HERE YOU GO

You would probably have to make a heck of a lot of discs to break even. An old trick might be to find a local supplier and ask for some free samples!

Short of that... have your tried perhaps cutting something from old tupperware or similar?

Re: Beogram 4000 bearing disc replacement

chartz — Wed, 09 Feb 2011 07:06:21 GMT

So let me ask the questions once more:

- why did B&O use the inferior bearings?

- does anybody know someone able to produce new discs, possibly better ones?

There must be a solution out there!

Re: Beogram 4000 bearing disc replacement

chartz — Tue, 08 Feb 2011 16:20:07 GMT

Well I can't flip it, so I'm going to stick to my teflon film for now. Definitely something for Martin, this!