Northfield Precision Instrument Corporation, a designer and manufacturer of precision workholding chucks, introduces their Model DPH-500-5 chuck. It has serrated jaws to enhance the grip force and an axial locator with integral/air-detect function to ensure positive loading of the customer's part. The axial locator also has a tertiary datum locator to allow the part to be twisted into position upon loading. Northfield Precision designs and manufactures air chucks for any lathe, boring machine, grinder or VMC. Models include through-hole, high-speed and quick-change. Available in SAE or metric, in sizes from 3" (76 mm) to 18" (457 mm). Accuracies of 0.001" to 0.00001" (0.254 m) guaranteed. Custom workholding chucks and jaws are available and free engineering assistance is offered.