Photo shows Northfield’s standard model 650 air chuck (right) and standard 6in collet chuck (left). These chucks are used on a tilting rotary table which makes it difficult to remove the air feed when changing from air chuck to collet chuck. The adapter (center) has air ported through it, and the chucks have matching air ports. When changing over, there is no “air tube” to unscrew--simply unbolt one and mount the other.