Vernier Calipers: Vernier Calipers are moreprecise tools capable for measuringexternal dimensions, internaldimensions, and depths. Besidesthe two pairs of measuring jaws andthe depth gauge, its main featuresalso include a main scale and avernier scale. (Acc : 0.02mm)
Vernier Height Gauge: A vernier height gauge is used for measuringheight of an object or for marking lines onto an object ofgiven distance from a datum base.
Micrometer: A micrometer is a more precise measuring instrument than the vernier calipers. The accuracy is comefrom the fine thread on the screw spindle. The ratchet prevents excess force from being applied. Generally, the screw spindle has a pitch of 0.5mm. The thimble is divided into 50 equal divisions. (Acc : 0.01mm)
Common types of micrometers used in the workshops are:
Outside Micrometer: An outside micrometer (figure) is used formeasuring external dimensions. The work to bemeasured is placed between the anvil and the tip ofthe spindle.
Inside Micrometer: This is similar in structure to an outside micrometerand is used for measuring internal dimensions asshown in figure.
Depth Micrometer: A depth micrometer is used for measuringthe depth of a hole, slot and keyway etc. A completeset of depth micrometer is equipped with spindles of different lengths, which can be interchanged to suitdifferent measuring ranges.
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