Railroad Gauges

Precision Gage & Tool Co. provides AAR railroad gauges, including Rule 1 gauges from the AAR field manual, for in stock availability check our online shop here or by calling (937) 866-9666 or send us an email at info@pgtgage.com.

Railroad Gauges

AAR and Rule 1 Railroad Gauges

  • Long Form Certification is provided at no additional cost for all new railroad gauges sold by PG&T that require certification. 
  • AAR Rule 1 gauges and rail gauges meet AAR specifications
  • Coupler gauges including 44057, 44250-3, 47120-2 and 36527-3
  • Railroad gauge certification capabilities include tape measures, torque wrenches, torque testers, pressure gauges, electronic gauges, standard measuring tools and all railroad gauges to meet AAR specifications

Gauge Certification

Gage certification is the foundation of a railroad gauge surveillance program. Gage surveillance is simply an orderly system of keeping records on railroad gauge wear. PG&T supplies long form certification for new gauges and masters. Each receives a dedicated I.D. number.  An assigned PG&T number will be used if a number or other type of mark is not designated or requested at the time of purchase.


Railroad GaugeSometimes a customer’s railroad gauge is found to be out of tolerance. A customer is give the option to purchase a new gauge or have their gauge repaired or corrected where applicable.

If the customer chooses not to repair their railroad gauge or it is deemed too costly to repair, the railroad gauge is returned to the customer with an inspection report . Gages returned in these instances are not re-certified.

Long Form Certification

  • Long form certification certifies the actual measurement of all specific critical dimensions and critical characteristics for a particular railroad gauge.
  • One railroad gauge per long form certification. (See certification marking).
  • This certification also provides certification of N.I.S.T trace-ability

The certification document prepared for these items includes the following:

  • Name and address of organization providing the certification
  • Customer name (company and or person) and company address
  • Control number, unique to the railroad gauge
  • Description of the gauge
  • Description of measurement and test equipment used to perform calibration Certification date
  • Gage certification date
  • Calibration interval (If desired by customer)
  • Identification of calibration procedure/method used
  • Assigned certification value(s) and critical characteristics when applicable
  • Certification uncertainty or reference to specification, drawing, or other document specifying tolerance limits
  • Applicable corrections
  • Special use limitations or certifications status, when applicable
  • Identification of person performing calibration/certification
  • Identification of person authorized to review and approve validity of certification

Custom Railroad Gauges

We build to your print a custom railroad gauge for your particular needs. We will work with your engineers to finalize and then manufacture custom railroad gauge designs.  Precision Gage & Tool also provides:

  • Non-standard railroad gauges
  • Custom railroad gauges
  • Master discs
  • Master rings
  • Indicators
  • Micrometer standards

Important Facts About Railroad Gauge Hardness

A railroad gauge that is softer than the part it gauges or measures, may fail.  After multiple applications a soft steel gauge may become nicked, distorted and worn out. For maximum wear life,  our railroad gauges are made from the highest quality materials. You’ll always have a greater payback with Precision Gage & Tool.

Download the PG&T Railroad Gage Brochure for offline viewing.