U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Pitch Diameter Measurement of Threaded Gages Using a CMM

Published

Author(s)

Ralph C. Veale, Edgar G. Erber, Bruce R. Borchardt

Abstract

The reference datum for a screw thread is the pitch diameter cylinder. Although a defined method within the United states for pitch diameter measurement exists, it does not follow worldwide procedures, and the complexity and uncertainties associated with this measurement often go unappreciated. Some of the problems associated with using a coordinate measuring machine (CMM) for measurements on both external and internal threads are discussed.
Citation
Chapter in: Structural Integrity of Fasteners, STP 1236, P.M. Toor, Editor
Publisher Info
American Society for Testing and Materials, Philadelphia, PA
Pub Type
Books

Keywords

CMMs, coordinate measuring machines, measurements, pitch diameter, screw threads, thread measurement, threaded fasteners, threads
Metrology and Manufacturing

Citation

Veale, R. , Erber, E. and Borchardt, B. (1995), Pitch Diameter Measurement of Threaded Gages Using a CMM, American Society for Testing and Materials, Philadelphia, PA (Accessed June 8, 2023)

Created December 31, 1994, Updated October 12, 2021