Customized Sliding Air Chucks

Northfield is continually developing new products, custom designed to solve the most difficult workholding problems for all metal, composite, ceramic and glass materials. Our engineers provide custom workholding solutions for internal/external, thin-wall/rigid, over the shoulder, and hundreds of other unique solutions to exactly meet each workholding requirement to bring gage block accuracy to your production pieces.

MODEL 650 This is a model 650 tooled with special hardened and ground sub-jaws and inserts to grip (3) different hydraulic pistons. They look like head valves, but they are not. The changeable inserts grip the large diameter which is spherical. Inserts repeat to 1/10,000 T.I.R. when removed and re-installed. A tail stock supports the opposite side. This is a turning operation.		MODEL 650 This is a standard Model 650 (.0001” T. I. R.) air chuck with custom flex jaws….. Jaws flex to compensate for the out of round work piece
MODEL 350 This is a standard model 350 (.0001 T.I.R.) gripping a gun part. This part is located on the outer face of the Offset tab. Therefore the part is loaded into the jaws, compressing the spring ejector then the cross slide of The lathe moves into position and the chuck opens pushing the part against a hard stop. The chuck re-clamps and the part is hard turned.		QUICK CHANGE AIR CHUCKS Features Include: - Fast changeover chucks for reduced set up time - No reboring jaws - Standards from 3" to 18" - Custom specials for workholding applications - Changeable Inserts
MODEL 450 AIR CHUCK Model 450 Air Chucks (with special top tooling) mounted on a Pallet which installs on the bed of the customer’s machine. The machine’s pick-and-place arm picks up the parts after they are finished in the front (2) chucks and transfers them to the rear (2) chucks for finishing. All hosing is routed under the plate for actuation of the chuck’s jaws.		MODEL 625 (.250 JAW TRAVEL) This is a standard Model 625 (.250” Jaw travel) rotating air chuck. This customer needed the extra travel an custom cut top jaws to clear the flange at the back end of their work piece. The jaws are precision ground to locate and clamp the work piece.
12-IN. DIA. QUICK CHANGE CHUCK Northfield model 1200 air chuck with patented ultra precision quick-change sub-jaws. Top jaws have a tre-panned groove that engages with the precision ground bore of the sub-jaws. As the jaws are tightened, a flexible tab expands into the tre-panned groove, pulling the jaws against the ground bore and loading the jaws in position with zero play. The result is a top-jaw/sub-jaw connection that repeats to 1/10,000.		3-IN. DIA. CHUCK WITH OUTER RING ROTARY UNION Standard Northfield model 350 with special rotary union on O.D. of chuck. Chuck is mounted to rotary table with no hole through the center for an air feed tube. Chuck is used to check shear strength of small screws.
MODEL 670 2-JAW WITH SPECIAL JAWS Like many powdered metal parts, this water pump component comes out of sintering nearly complete, but still needing a few final operations. In this case that means machining the bore and flange, cutting the threads and tapping the holes. To hold this part, Northfield provided one of our standard Model 670 2-jaw chucks fitted with special jaws to grip the outside diameter of the part. Special orientation pins are used to locate the part for finish machining		MODEL 650-SWIVEL JAW CHUCK Model 650 standard chuck with face mounted axial locators and special swivel jaws to compensate for out of round parts (clutch stampings). We are gripping a thin walled stamped diameter for boring a bearing diameter that must be round within 2/10,000 of an inch
MODEL 700 – 4140 TOP JAWS Chucks are modified for spring clamp air open. Special hardened and ground 4140 top jaws grip O.D. of drive shaft slip yokes. Jaws have excess material milled away to reduce centrifugal forces. A special hardened & ground alloy steel spline driver is mounted to chuck face for easy loading and driving of shaft as it spins to 3,500 RPM for balancing. • T.I.R. = 1/10,000 • Cycle time 60 sec.		PRECISION AIR CHUCKS Features: - Standard Air Chucks from 3" - 18" diameter - Featuring Self Contained Actuator - High Speed Functionality - Standard Jaws in Stock
MODEL 625 CB Chuck has special jaws to grip I.D. of cast aluminum fuel pump component. Face mounted stop has three rest buttons for positive axial location. Part is gripped in chuck and a tail stock with live center supports the opposite side. Work piece is turned and faced.		MODEL 1000 Chuck is converted to spring clamp, air open. Springs are adjustable to give 6 different jaw force settings. Chuck has hardened & ground faceplate with coolant grooves to flush dirt & chips away. Sub-jaws hold special pull down inserts to pull work piece into face or zero axial location. Chucks mount on pallets as work pieces are machined at different stations. At end of cycle air opens chuck for parts loader. • T.I.R. = 1/10,000 • Axial = 0
MODEL 450 WHS Jaws and axial stop are air hardening tool steel (A-2) heat treated to 58/63 Rockwell “C”. Customer bores drill chuck outer ring at 5,000 RPM. • T.I.R. = 1/10,000		MODEL BIG RED No, we’re not making a fashion statement for chucks here! At Northfield, we affectionately refer to the aluminum anodized chuck as “BIG RED” (it’s anodized red).
MODEL 620 CB Chuck is modified with an extended counter bore. Jaws grip punches for finish form grind on Weldon profile grinder. Extended counter bore accepts long 1-inch diameter and below punches to eliminate overhang. • T.I.R. = 1/10,000		MODEL 450W Model 450W set up for auto-lube. Center stop has a carbide 60 degree female taper ground on chuck. Jaws have brazed carbide inserts and pull part into female carbide nest for zero axial location. Jaws hold part concentric to 1 micron. Customer grinds face of nozzle & needle to match the surfaces. • T.I.R. = 50 millionths • Axial = 0 • Cycle time 9 seconds
MODEL 620 CB Model 620 CB with precision MT-5 adapter. Parts are diesel fuel injection nozzles for O.D. profile grind on Tschudin Angle head grinder. Chuck has sub-jaws, pull down inserts & carbide ball nose shafts mounted on No. 15 taper sleeves. Carbide shafts run concentric to 1/10,000 T.I.R. Inserts repeat to 1/10,000 T.I.R. Inserts grip nozzle, center the base and pull the nozzle seat onto the carbide ball nose shaft.		MODEL 450 CHUCKS Special jaws made of air hardening tool steel (A-2) 58-63 Rockwell “C” with braze carbide inserts. Chuck grips 1/8-inch shank carbide Micro drills, RTW grinds flutes to diameters down to .002 inches. Drills are for circuit board drilling. Stack 3 boards drill 3 holes per second at 100,000 RPM. • T.I.R. = 1/10,000
MODEL 670, 2-JAW CHUCK The part has two shafts to be ground that are offset. (One is face down in the jaws.) Shafts are oriented with a spring-loaded wedge to center the tail while the off center bore of the jaws grip the shaft. Exposed shaft is on center. After shaft is ground, flip part over and grind 2nd shaft. • Center to center repeatability 2/10,000		MODEL 425 WITH SPECIAL FLOW CONTROL, SUB-JAWS AND INSERTS Monogram Aerospace manufactures highly sophisticated fasteners. If you have ever flown in a commercial airliner, you have probably seen Monogram fasteners dotting the wings of the plane. Monogram asked Northfield to develop a chuck to hold these fasteners during machining (hard turning and tapping). To accomplish this we had to address several challenges: The large size of the fastener head that our chuck jaws would have to grip over. Two head styles – flat head and button head – each having their own specific datum for axial banking. Finally, Monogram manufactures fasteners in hundreds of different sizes. This meant that our chuck would have to allow quick change from one set-up to the next. For the flat head style fasteners the chuck jaws open wide enough to clear the head of the fastener. The part is pushed into the chuck to the stop. The jaws close and the part is ready to be machined. A special stop allows a continuous chip to exit from the side. The button head style fastener goes all the way into the chuck, as usual. The jaws begin to close in sequence with a pusher piston mounted on the face of the chuck, forcing the part up against the back of the jaws. The pusher is adjusted with a built-in flow control valve. This method allows for greater accuracy than had been possible before. To accommodate the variety of sizes, the chuck uses a sub-jaw/insert set-up that allows Monogram to change from size to size by removing three screws and three inserts. Using our chuck, Monogram is able to run their machines twenty-four hours a day, seven days a week. Cycle times are measured in seconds and repeatability is to within 0.0001 inch.