Northfield Precision Instrument Corp.

Diaphragm Chuck is developed for indicator manufacturers.
Architectural & Civil Engineering Products

Diaphragm Chuck is developed for indicator manufacturers.

Designed for manufacturers of electronic and mechanical indicators, Model DPH-600 is 6 in., 10,000 rpm, totally sealed, TIR diaphragm chuck with special jaws, stop, and changeable fixtures. It enhances and increases production of machining 2 bores that guide indicator rod. Once side is machined, fixture is turned over, and second side is machined; alignment of 1/10,000 TIR is achieved bore to...

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Workholding Chuck has drawbar activated design.
Machinery & Machining Tools

Workholding Chuck has drawbar activated design.

Along with centered pilot for optimized accuracy and repeatability, 4 in. dia drawbar-actuated, pull-down chuck features spring-loaded funnel-shaped base that goes into chuck body with zero clearance sliding fit. Operator pushes part down into funnel, and 2 spring-loaded ball plungers hold part in place. Precision centering power air and diaphragm chucks are available for lathe and milling...

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Machinery & Machining Tools

Diaphragm Chuck has no metal-to-metal moving parts.

Measuring 5 in. in diameter, Diaphragm Chuck features 1-piece hardened and ground morse taper No. 5 adapter and female morse taper No. 3 in chuck face for stops and other tooling. Unit includes internal hammer to eject morse taper tooling and changeable inserts that repeat to 50 millionths T.I.R. Chuck is suited for high-speed extreme close tolerance grinding and turning.

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Air Chuck suits driveshaft clamping applications.
Machinery & Machining Tools

Air Chuck suits driveshaft clamping applications.

Modified for spring clamp air open, Model 700 features hardened and ground 4140 top jaws that grip OD of drive shaft slip yokes. Chuck jaws have excess material milled away to reduce centrifugal forces, while hardened and ground alloy steel spline driver is mounted to chuck face to facilitate loading and driving of shaft as it spins to 3,500 rpm for balancing. TIR is equal to 1/10,000, cycle time...

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Architectural & Civil Engineering Products

Pneumatic Chuck suits boring, milling, lathe applications.

Model 1200 air chuck incorporates precision, quick change sub-jaws. Top jaws have tre-panned groove that engages with precision ground bore of sub-jaws. As jaws are tightened, flexible tab expands into tre-panned groove, pulling jaws against ground bore and loading jaws in position with zero play. This results in top-jaw/sub-jaw connection with repeatability to 1/10,000. Chucks are stainless...

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Workholding Chuck features pull down insert.
Machinery & Machining Tools

Workholding Chuck features pull down insert.

Model 620CB Air Chuck features precision MT-5 adapter and diesel fuel injection nozzles for OD profile grinding on Tschudin Anglehead grinder. Device has sub-jaws and carbide ball nose shafts mounted on No. 15 taper sleeves. Carbide shafts run concentric to 1/10,000 TIR. Pull down inserts repeat to 1/10,000 TIR and grip nozzle/center base and pull nozzle seat onto nose shaft.

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Precision Diaphragm Chucks suit clamping applications.
Machinery & Machining Tools

Precision Diaphragm Chucks suit clamping applications.

With TIR of 50 millionths, 5 in. DPS-5s Air Open Diaphragm Chuck features 8 sets of alloy steel jaws, hardened to 58/63 Rockwell C, that repeat to 1/10,000 when removed and replaced. Six different stops mount to center of chuck for positive axial location. For C.V. clamping, Special 7 in. counterbalanced diaphragm chuck has 3 pull down fingers. Jaws grip OD of C.V. joint while fingers pull it...

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Diaphragm Chuck has internal rotary union.
Machinery & Machining Tools

Diaphragm Chuck has internal rotary union.

Model DPH-300I standard 3 in. dia (1 micron TIR) 6-jaw diaphragm chuck is designed with internal rotary union that keeps air feed tube stationary. This eliminates vibration of standard rotating tube and allows chuck to operate at speeds up to 15,000 rpm. Chucks are tooled with special jaws and stops to hard turn small fuel injection components.

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