Videos & Photos Videos How To Expert Tips How to use an NMRA gauge

How to use an NMRA gauge

By Angela Cotey | September 20, 2011

| Last updated on December 7, 2020


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Model Railroader senior editor Jim Hediger shows how to use a National Model Railroad Association gauge to check the spacing of different aspects of track and your model trains.

25 thoughts on “How to use an NMRA gauge

  1. A video is better than a picture. Two additions: NMRA makes similar gauges in O scale and, I believe, N scale. Second, Neil showed how the gauge indicates wide track gauge, but it also can indicate track gauge that is too tight. Even if you lay flex track and R-T-R turnouts this gauge is indispensable for smooth operation.

  2. I have both HO & N scale NMRA gauges but did not realize how versatile they will prove to be. Thanks Jim.

  3. Yes what is the other pin on the go-no go gauge for?
    I have one section of track that constantly derails my 2-6-6-2T where everything seems to check fine. Really puzzled!

  4. Good explanation of the use of gauge. But, please go further and explain how to correct out of gauge wheels and particularly turnouts. Thanks

  5. I thought thee cool part about that was it told you how far or how close structures need to be next to the track for proper clearance I wonder does it do portal height standing up for tunnels?

  6. I find it amazing that that the common sense of laying out track
    word evolved so easily as the railroads lay out mainlines, yards, engine facilities

  7. I got my gauge about 45 years ago. If you have a spot where derails are common, check the track gauge! Does one car derail frequently? Check the wheels to see if they are within scale. I had a new car and one axle was way off. I have an engine where the coupler height is of, it keeps loosing the cars. My gauge proved it was the engine, not the box car.

  8. This is why I think Video Plus will be such a hit. I just learned what the small notch was in the gauge. Thanks MRR

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