Mitutoyo 505-742 Dial Caliper

The Mitutoyo 505 series dial caliper uses a combination of a vernier scale and a dial whose pointer travels one rotation for each 0.1” measured to perform precise outside diameter (OD), inside diameter (ID), depth, and step measurements. The dial caliper has a fixed (main) scale and a movable dial, unlike the vernier caliper which has a second, movable vernier scale. The dial is circular and has a pointer; it is mounted on a toothed gear track which drives the pointer. As the dial moves over the main scale rule, the pointer rotates once to give the additional fractional reading. The second measurement is added to the main scale reading to obtain a final result accurate to the smallest graduation marked on the dial. The main scale and dial are marked in inches. The dial can be rotated beneath the pointer to measure size differential between two objects. The dial caliper is easier to read than the vernier caliper, thus safeguarding against user reading errors. Its standard of precise me