PRECISION MEASURING AND GAGING - OD1642 - LESSON 1/TASK 2
are provided with a ratchet stop. The flat base ranges in size from 2 to 6
Several extension rods are normally supplied with this type of
(5) Dial Vernier Caliper. A dial vernier caliper looks much like a
standard vernier caliper and is also graduated in one thousandths (0.001) of
an inch. The main difference is that instead of a double scale, as on the
vernier caliper, the dial vernier caliper has the inches marked only along
the main body of the caliper and a dial with two hands to indicate
hundredths (0.010) and thousandths (0.001) of an inch.
The range of the
dial vernier caliper is usually 6 inches.
(6) Dial Bore Gage.
One of the most accurate tools for measuring a
cylindrical bore, or for