6” Diaphragm Chuck with non-metallic top tooling in contact with the customer’s part. Our customer manufactures these delicate, ceramic rings (shown in the foreground) and needed a way to carefully hold them on the OD so they could grind the ID. They requested that no metal touches their parts. We developed custom top tooling made from the most abrasion-resistant plastic available (without a filler). These items can be quickly changed for new ones should a future need arise. Northfield Precision Instrument Corporation is a leader in developing custom solutions for difficult problems.