Northfield Precision Instrument Corporation, a leader in the design and manufacture of precision workholding chucks, introduces its Model 1,070-250W air chuck. The 1,070-250W is a two-jaw chuck with a special 1/4” opening on diameter (1/8” opening per jaw). This chuck is modified for spring clamp and air open, using Nitrogen compressed gas springs in the spring clamp mechanism. The operators chose this modification so if they lose air pressure to their machines, the parts won’t fly out and damage the operator or machine. The chuck grips the part (a cover for a torque converter) on four points with special carbide-coated grippers. The chuck opens at < 50psi and grips the part at a constant 35psi. The jaws are special hardened and ground 1,018 steel with a Rockwell C hardness of 58-63. The chuck also contains a full-circle part stop for axial location. The stop is also hardened and ground with the same hardness as the jaws.