[modeleng] Re: Nylon material as a bearing surface

Would go with Ken on this one Peter, better to use a piece of ptfe if you 
can get it. Nylon will suffice but it needs to be of a decent quality. If I 
can get in touch with a friend of mine, I will ask where he got the nylon 
from for the Pony bearers on his2-6-0. Can't promise as he is in New Zealand 
for 6 weeks!

Dave.


----- Original Message ----- 
From: "Ken Strauss" <ken.strauss@xxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Thursday, November 23, 2006 4:21 AM
Subject: [modeleng] Re: Nylon material as a bearing surface


Perhaps it is different in the UK but in NA cutting boards are typically
HDPE (High Density Poly-Ethylene) and not Nylon. HDPE provides lower
friction and better abrasion resistance than Nylon but it is not as hard nor
as strong.

> -----Original Message-----
> From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
> On Behalf Of The Sheppard Residence
> Sent: Wednesday, November 22, 2006 6:54 PM
> To: modeleng@xxxxxxxxxxxxx
> 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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