Precision air chuck for timing gear

Precision air chuck for timing gear

February 8, 2017

Northfield Precision Instrument

Island Park, New York – A customer came to precision workholding chucks manufacturer Northfield Precision Instrument Corp. to design a chuck that would allow a precision sprocket to be positioned in the chuck only one way to assure a properly timed gear part. It would have to work with a range of gear diameters. Northfield’s engineers customized their NF-650 air chuck with special tooling to meet these requirements.

Modifications consist of a locating ring to ensure one-way loading. A custom axial locator, with air detect seat sensor holes, guarantees positive part seating. The custom top tooling also includes an adjustable air-actuated orientation key to time the work piece off of gear teeth. The orientation key supports air detection as well, to ensure part engagement. Custom designed and dedicated sub-jaws are ground to accept changeable inserts for a range of gear diameters. Inserts can be easily changed out and still repeat to .0001" TIR. 

Northfield Precision Instrument designs and manufactures air chucks for any lathe, boring machine, grinder, or VMC. Models include through-hole, high-speed and quick-change. Chucks are available in SAE or metric, in sizes from 3" (76mm) to 18" (457mm). Accuracies of 0.001" to 0.00001" (0.254µm) are guaranteed. Custom workholding chucks and jaws are available. Free engineering assistance also is offered.

Source: Northfield Precision Instrument Corp.