Flexible Threaded Hole Centerline Location Gages

Flexible Threaded Hole Centerline Location Gages

FLEXIBLE THREADED HOLE CENTERLINE LOCATION GAGE

This style of Threaded Hole Centerline Locator Gage should be made from tool steel. The threaded end is made to the maximum material thread pitch diameter. The threaded end is then slit, usually twice, and the thread is expanded slightly so that when screwed into the internal threaded hole the Flexible Threaded Hole Centerline Locator Gage is a snug fit in the hole and conforming to the internal thread pitch diameter cylinder.

This style has the advantage of positive pressure against the internal thread pitch diameter cylinder, but there is an issue of whether or not the spring loaded thread is in fact concentric with the known cylinder. The thread was concentric with the known cylinder before the slits were added, but I know of no way to assure the relationship remains after the slits are added.

Another issue with the Flexible Threaded Hole Centerline Location Gage is that of calibration. The thread can be measured, but in its sprung condition the measurements are meaningless. Also, I know of no lab that is able to verify the relationship between the known cylinder and the thread pitch diameter cylinder.

Other Styles of Threaded Hole Location Gages:

Call or e-mail us for a quote on anyone of the above styles.

COMMENTS:
Initial posting: 8/18/2008
Last Revised: 7/26/2017
Refer comments/corrections to office@gagecrib.com.