Railroad related web content provided as an educational volunteer effort of the American Passenger Rail Heritage Foundation (APRHF), a 501(c)(3) non-profit organization.
To help preserve passenger rail heritage click here to join today! Support APRHF by shopping at Amazon Smile! Hosting made possible by our sponsors.

Custom Search
HOME APRHF TRAINWEB.COM .NET .ORG .US FORUM FACEBOOK NEWS RAILCAMS TRAVEL RAILFAN MODEL JOBS PARTY
TrainWeb Reports & Web Sites: Featured Today! Previously Featured Slideshows Highlighted Past The Big Stories Directory

Proto 64 home page
NMRA P:64 Standards

Last Updated April 12, 2011

 

Comments

A word about the current P:64 standards. The current Standards, listed below, use an engineering allowance called FIT with any scale less than 1:56. 

    


 Proto:Scale Ratio Gage Fit Slide









Results: Proto:64 64.00 Standard 0.001 0.002

TR-1-2005
6/2/2007



Select:
56.5 Variance
See TN-1.1.2 for formula explanations


















S-3.1 TRACK G C S F F H P R *
Name of Scale Track Gage Check Gage Span Flangeway Frog Flangeway Guard Flange Depth Switchpoint Spread Railhead Radius
Min Max Min Max Min Max Min Max Nominal Min Max Min Max


Proto:64 Inch 0.883 0.902 0.851 0.853 0.814 0.823 0.028 0.030 0.031 0.020 0.809 0.006 0.009
mm 22.43 22.91 21.62 21.67 20.68 20.90 0.71 0.76 0.79 0.51 20.55 0.15 0.23



S-4.1 WHEELS K B N T D


Name of Scale Wheel Check Gage Back to Back Wheel Width Flange Width Flange Depth WHEEL GAGE

Min Max Min Max Min Max Min Max Min Max Min Max




Proto:64 Inch 0.844 0.849 0.825 0.834 0.087 0.092 0.017 0.019 0.018 0.020 0.859 0.872

mm 21.44 21.56 20.96 21.18 2.21 2.34 0.43 0.48 0.46 0.51 21.82 22.15

                               

 

If you have questions or comments about this site,
write the Proto:64 Webmaster at
p64 AT dapenguin DOT net

  


View TrainWeb.US Stats

Click below for pages in the directory of TrainWeb sites:
0-9 A B C D E
F G H I J K
L M N O P Q
R S T U V W
X Y Z
CLICK HERE FOR THE FULL CATEGORY DIRECTORY

Visit our Rail Magazine promotion trading partners:      (Click here to add your print rail magazine.)


Custom Search
TrainWeb Reports & Web Sites: Featured Today! Previously Featured Slideshows Highlighted Past The Big Stories Directory
HOME APRHF TRAINWEB.COM .NET .ORG .US FORUM FACEBOOK NEWS RAILCAMS TRAVEL RAILFAN MODEL JOBS PARTY
Newsletter | About Us | Contact Us | Advertise With Us | Silver Rails Country for Train Enthusiasts
View Stats  | Page updated:02/08/2016  | Version 2016b08c  | Links  | ©2015-2018 NordiLusta, LLC