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Re: [T3] Seat Rails.


Hi Toby,
I don't remember the exact decision before, but I think we've made a couple
of reasonable suggestions. PTFE (teflon) is the best for self lubricating
properties (it has the lowest coeff of friction) BUT it is soft and will
embed dirt and act like sandpaper -as will all plastics to some extent. The
best machining plastic I know other than the phenolics is Acetal copolymer
(or is it homopolymer)(trade name Delrin) It is hard and tough and less
likely to embedd dirt, but it can be quite brittle in thin sections. In
between Teflon and Delrin there are a vast array of different nylons and
others, some with added lubricant (moly) that would probably do. They all of
course vary in price with Teflon up there near the top. If you want to know
more, check out this website: RSWWW.COM and navigate to
mechanical/engineering materials and have a look for yourself- they have
specs for lots of different (but not all) engineering plastics.
Personally I think I would look at Delrin as its an excellent gen purpose
plastic.
I'm not in the market for sliders myself as I have a '73 but if someone has
an improvement over the stock short sliders there, I'd be interested- they
allow a lot of rock and vibration.

Good Luck,
Mark Seaton
'73 Fasty, London

----- Original Message -----
From: "Toby Erkson" <air_cooled_nut@pobox.com>
To: <type3@vwtype3.org>
Sent: Friday, May 02, 2003 3:40 PM
Subject: Re: [T3] Seat Rails.


> Though I appreciate everybody's help on finding seat rails, that was not
the
> question I asked.  I wanted to make better reproductions and thus I wanted
to
> know about the material we had discussed aways back.  Looks like we've
> forgotten so I'll investigate myself...unless there are any material
science
> volks out there who wouldn't mind helping me ;-)
>
>      Toby Erkson  --  air_cooled_nut@pobox.com
>      '72 VW Squareback, '95 VW Jetta, '81 Gold Wing
>      http://www.icbm.org/
>      Portland, Oregon
>
> ----- Original Message -----
> > > Do folks mind mentioning the seller from which they bought their
> > >seat rails?  I seem to recall that there were several different folks
> > >selling them.
> >
> > Unfortunately it was a while ago.  The ones I bought didn't come with
> > pins.
>
> -------------------------------------------------------------------
> List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org
>
>



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