Nick Ridgway
@Nick Ridgway said:
I just use the EMGS back-to-back for all wheelsets and gauges for my trackbuilding. I have no idea about the tolerance on manufacture and I doubt if my track is right to within 0.15mm. In any case, I’ve never measured it.
0.15mm on the track gauge scales-up to a little under 1/2″ in the 12″:1ft scale world, which is within acceptable parameters for continued use, according to various editions of “British Railway Track”, published by the Permanent Way Institution. However, such a dimension is way out-of-tolerance on the back-to-back measurement, which is in the order of 1/8″, resulting in a not-to-go application on the vehicle in question when beyond that limit.