This is our Northfield Model 1000 Sliding-Jaw Air Chuck (0.0001” TIR) with special Top Tooling and Axial Locator. Our customer is a gauging company that needed to grip a small area of a large casting so they can check O.D. run-out of their part. Special, tall top-jaws are diamond-coated for a secure grip on the casting. We used an Axial Locator with button pads as a resting surface for the part’s flange while swallowing the rest of the part.