Northfield Precision Instrument Corporation introduces their Model 650 Sliding Jaw air chuck. This air chuck, with 0.0001” TIR, has special quick-change jaws and a hard stop. This particular custom-made chuck was made for a customer who manufactures output gears and needed to grip on the interior diameter.Subjaws are permanently mounted to the chuck’s master jaws. Quick-Change top jaws are held in place by one bolt through a keyhole slot in each jaw pad. Northfield Precision designs and manufactures the world’s most accurate 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” (76 mm) to 18” (457 mm). Accuracies of 0.001” to 0.00001” (0.254 m) are guaranteed. Custom workholding chucks and jaws are available and Free engineering assistance is offered.