Probe of the Month October 2017

Custom Calibration Sphere

This is a custom calibration sphere. It features a 15.0 mm diameter ceramic sphere and stainless steel base. What’s unusual is its relatively short 55.0 mm length, and its ¼-20 UNC thread. The base has a 12.0  mm major diameter and 7.0 minor diameter.  The entire assembly weighs 28.73 grams. A traceable laboratory calibration certificate was supplied with the sphere.

Our client is a New England-based aerospace manufacturer.  They ordered one.