Split ball gauges use a similar principle as the telescoping gauge, but the measuring head uses a split ball mechanism that allows it to fit into very small holes.

Question

Quizplus · Accepted Answer

Split ball gauges are designed to measure small holes, and they use a split ball mechanism to expand and fit into these holes, similar to how telescoping gauges work for larger diameters.

Split Ball Gauges Use a Similar Principle as the Telescoping