Describe the main operating features of any one of the following: Four-jaw independent chuck, Plastic dip-coating tank, Sprocket and chain mechanism. - Leaving Cert Engineering - Question i - 2012

The four jaw independent chuck is a type of chuck commonly used in lathes for gripping square, round, rectangular, and irregular shapes. Unlike a three-jaw chuck, which centers the workpiece automatically, the four jaw independent chuck allows the operator to center workpieces more accurately, though it requires more time.

The jaws of a four jaw chuck can be moved independently of one another, providing versatility in gripping unevenly shaped components. Each jaw is actuated by its own screw, allowing for precise adjustments. Moreover, the jaws are reversible, enabling the chuck to handle various sizes and shapes effectively.