Width between rails - HO Scale

Model Railroader General Discussion (Model Railroader)
1

Me Again (Ho-Hum),

I just finished watching the video on how to use the NMRA scale gauge. I have got to get me one.

It seems that at certain point, my wheels seem to drop inside the rails (the flange of one wheel is on and against the inside of the rail but the other side has dropped inside the rail). That would indicate wide rails or narrow wheels right?

Until I get me a gauge, could someone tell me the width of the rails - inside to inside – mm and inches.

I looked around on the web, but mostly found info about scale to real world and width of real track (two horses).

Thanks,

cplmckenzie

2

16.5 MM

Joe

3

Here it is: http://www.nmra.org/sites/default/files/standards/sandrp/pdf/S-1.2%202009.07.pdf

According to NMRA 16.5 mm is the minimum value.

4

Here the link is active.

http://www.nmra.org/sites/default/files/standards/sandrp/pdf/S-1.2%202009.07.pdf

Rich

5

A caliper would be useful but I have only had to use the Kadee track gauge.

No idea on how you searched but I did a Google search for ho track dimensions and 16.5 mm came right up.

Rich

6

Wow, Great. Will definitely bookpark this page.

Thanks,

cplmckenzie

7

In most cases, the track is OK and the wheels are out of alignment. UNless they are solid plastic, you can be pull and twist a bit to get the correct spacing, but wait to get the gauge so you have it right the first time.

8

The NMRA page for all standards and recommended practices is

http://nmra.org/index-nmra-standards-and-recommended-practices

Lots of good information.

Enjoy

Paul