Diaphragm turning chuck DPH-500

automatic3-jawair-operated

Shown here is a special, Northfield 3-jaw, 5” Diaphragm Chuck (DPH-500 type) with custom top tooling. Our customer requested a method to accurately grip their small (.098” OD) fuel injector plungers without marking the OD. They also requested that the tip of their part rests in a carbide seat ground central to the chuck, requiring the special part stop shown. The jaws are made from a special, highly abrasion-resistant, engineered plastic designed to withstand repeated clamping with minimum wear. The bore diameter gripping the part was ground such that it yielded an accuracy and repeatability of better than 50millionths” TIR total runout to the chuck’s centerline.