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Introduction
The PD-6001 Thread Diameter Measurement Gage inspects the pitch diameter of internal threads
ranging from 6” - 24”. The pitch diameter of a thread is the size at which two parts will screw together
without exceeding product tolerance limits.
The PD-6001 gage uses contact points that are precision ground in matched sets to ANSI
specifications to ensure maximum accuracy. The contact points seat in the thread at the pitch line
during inspection and the gage’s indicator reports actual measurement readings. Each set of contact
points is interchangeable to allow measuring different thread pitches. Contact point diameters are
manufactured to tolerances of +.0002” and measurements are based on the proven three wire
inspection method and technique.
The PD-6001 includes eight extension rods that attach to the gage and allow measuring a range of
diameters up to 24”. Using different combinations of the extension rods and the fine adjustment knob
will give the PD-6001 gage the proper internal dimension for the part being inspected. The PD-6001
Gage Extension Rod Selection Chart provides minimum and maximum diameter ranges for selecting
the proper combination of extension rods for the application.
Before inspecting parts, the PD-6001 gage must be preset to a nominal predetermined dimension. For
determining the gage’s setting dimensions, gauging tolerances, and specific type of contact point for
the application, the Thread Disk for Windows program is available as an option. The PD-6001 gage can
be preset using gage blocks or the MIC TRAC MT-3000 measurement center.
To inspect parts, the contact points are placed in the threads of the part and the gage is properly
positioned by sweeping to obtain the largest indicator reading. Taking measurements in several
different locations along the entire length of the thread will detect any variations in pitch diameter. To
maintain accurate readings during use, we strongly recommended periodically zeroing gage.
Technical Support
Phone: 713-472-7360
Hours: Monday – Friday 8AM – 5PM (CST)
Product Information and Updates
Visit our web site at: www.gagemaker.com