Northfield Precision Instrument Corp. introduces its Model 450 Sliding-Jaw Air Chuck. This air chuck (0.0001" TIR) has special ID-gripping top jaws and an integral axial locator.

Northfield Precision Instrument has a customer who inspects and balances torque converters and other driveline parts. The customer requested a chuck that could expand to grip the ID of their female splined shafts while it rotates on their balancing machine.

Previously, the customer used a "homemade" fixture that had a slip-fit without the expanding capability to grip the ID of the part. Northfield custom-designed the Model 450 sliding-jaw air chuck to also grip the ID of the part.