distance between point rails?

distance between point rails?

Post by Chri » Tue, 12 Mar 2002 06:23:00



I'm trying to build some turnouts in HO using code 83
rail. Question: What is the correct distance between
the point rails that I should use when soldering
them to the throwbar? I'm measurning from the rail
bases. Thanks!
 
 
 

distance between point rails?

Post by Bob Ma » Wed, 13 Mar 2002 04:58:43


First off, you always measure railheads, not bases.  The equipment doesn't
ride on the bases but rather on the guage lines of the heads and may hit the
backsides of the railhead in places where the rails are situated so.
Depending upon the style of turnout you are making - whether the points are
the same polarity as the ajacent stock rail - you can bring the ends of the
points as close as the check guage - 1/2 the min. flangeway and the fattest
part of the point needs to not exceed the check guage.  This is for points
that aren't carrying the opposite polarity.  If you do have the opposite
polarity then you want to put the points a bit further away and I would
consider that the min. would be at least the check guage - 1/2 min.
flangeway at any point.

--
Bob May
Imagine the terrorist's fun when they realize that their 72 "nubile ***s"
are all ***s and cranky from it being that time of the month!

 
 
 

distance between point rails?

Post by Wolf Kirchmei » Wed, 13 Mar 2002 08:54:49


Quote:

>First off, you always measure railheads, not bases....snip (excellent advice BTW)...

Get an NMRA gauge, it will make measuring check gauge etc much easier.

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distance between point rails?

Post by Roger Hensl » Wed, 13 Mar 2002 23:31:32


Quote:

> I'm trying to build some turnouts in HO using code 83
> rail. Question: What is the correct distance between
> the point rails that I should use when soldering
> them to the throwbar? I'm measurning from the rail
> bases. Thanks!

What you are talking about is the 'Point Spread'. As has already been
mentioned, you do not measure from the rail base. Take a look at
http://www.nmra.org/standards/s-3.html to get the recommended
dimensions for HO. Code 83 or Code 100, the dimensions side to side
are still the same.

Roger