Which tool is necessary for measuring ball joint movement in small increments?

The necessity of a ball joint checker with a dial indicator for measuring ball joint movement in small increments arises from its precision and specificity in measurement. The dial indicator features a spring-loaded probe that can detect minute movements and displacements. This allows for accurate assessments of the ball joint's play or looseness, which are critical for ensuring proper vehicle handling and safety.

While other tools, like digital calipers or tape measures, are useful for general measurements and dimensions, they lack the specific design and sensitivity required to gauge small movements effectively. The Archimedes screw, being unrelated to measuring components in an automotive context, does not serve this purpose at all. Therefore, the ball joint checker with a dial indicator is the most suitable tool for this particular task, delivering the precision required for effective maintenance and inspection.