[modeleng] Re: Nylon material as a bearing surface

There used to be a marvellous company in Neasdon NW London, called Glasers 
or something similar.
I used to wander in there and chat to the guys, a knowledgeable bunch, and 
walk out with various plastics, usually from their offcut pile, at silly 
prices.

If they are still there, I imagine a search would find them.
They will give advice, and supply what you need, and if it is a small piece, 
probably for pence.

Alan


----- Original Message ----- 
From: "The Sheppard Residence" <psbr20252@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, November 22, 2006 11:53 PM
Subject: [modeleng] Nylon material as a bearing surface


I started work tonight on the driving truck for "Topsy" a petrol
electric.  The driving truck is slightly different to the norm in that
it has a single bogie and pivots on the back of the locomotive.  Topsy
is an 0-4-2 so there is little risk of the (human) driver taking weight
of the (loco) driving wheels through a moment across the coupling.

Anyway, the bogie has two roller bearing that act as the rolling surface
when turning.  I have welded some steel in as the bearer they act
against, but I could really do with the body being about 1/2" higher (to
clear the flanges on very tight corners.

What I plan to do is add some nylon to act as the bearing surface as it
will give me the additional height and also require little (if any)
lubrication.

What I am interested in is the source of this nylon.  Can you see any
reason why I can't get a cheap nylon cutting board and use that?  Is it
any less dense than the nylon you would get from the usual sources.  If
it was less dense, would it really matter?

Cheers

Peter



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