Resources & Technical Papers

This page provides a list of white papers, articles, technical resources, and videos that has been written or compiled by Pratt & Whitney Engineers and Technical Specialists. All Technical Papers are provided as PDF documents. Articles are generally provided as links. If you would like more information on a particular subject matter, please send an email to info@prattandwhitney.com.

White Papers / Articles

Technical Resources

Thread Gage Calibration / Thread Measurement
Gage Block Calibration Tolerances
Gage Calibration Equipment
Bench Micrometer / Bench Gage
Calibration Services
Cylindrical Gages - Plugs, Pins, Rings, Master Discs
Gauge Block Comparator
Laser Micrometers
3-Wire Thread Measuring System
ACME Threads
Dimensional Metrology
Bench Micrometer
Ball Bearings
Roller Bearings (Tapered, Cylindrical, Spherical, Needle)
Tri-Roll Thread Comparators (developed by Pratt & Whitney Small Tool)
Variable Screw Thread Gages
Thickness Gage (contact rolling mill strip gauges)
Comparator gages
American National Standards Institute (ASME/ANSI)
Gage Maker Tolerance Chart
ASME/ANSI/BS/ISO B89, B1.2, B1.16M, AFBMA, BS4311, ISO3650, BS4065, BS4064, BS969
National, Regional, and International Standards
Thread Measuring Wires
Taper Pipe Threads (API & NPT have the same taper angle of 0.75-inch/foot).
National Pipe Thread Taper (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings. A taper thread will pull tight and therefore make a fluid-tight seal. NPT is defined by ANSI/ASME standard B1.20.1.
The American Petroleum Institute (API) established a tightly controlled gaging program to insure that the API thread form specifications are met in the manufacturing of oil field equipment, tools and pipe. [API Oil Country Gages]

Video Library

Pratt & Whitney's video library includes a number of short films on various topics including instrument functionality and Metrology measuring applications.
Video Library: Link

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