2009 NMRA Convention - Hartford, Connecticut logo
national train show

RP-24.2 Wheelsets

RP-24.2

Compiled By: S. R. Guinter
Drawing by: H. H. Krien

(RP24_2-2)

*For these dimensions see current NMRA STANDARD S-4.
#This dimension is not a STANDARD---see RP-25.

    NOTES:
  1. Rail contacting surfaces of wheel should be round, concentric and perpendicular to their axles within 1% of "K," Check Gage distance---see NMRA STANDARD S-4, measured as TIR (total indicator runout), while remaining within the limits of NMRA STANDARD S-4.
  2. Diameters of the two wheels in a wheelset should be equal within 1/2 % of "K."
  3. Axle overhangs "R" on each end should be equal within 1% of "K."
  4. Rail contacting surfaces should be smooth, true and free from irregularities.