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micrometer caliper [1]click to hear

Instrument that measures the thickness or the diameter of relatively small parts; it produces finer results than a vernier caliper.
micrometer caliper [1] ratchet knob frame anvil thimble spindle lock nut

ratchet knob click to hear

Part that stops the finely threaded screw when the pressure on the object being measured is sufficient.

frame click to hear

Horseshoe-shaped part that supports the anvil and a graduated device from which the measurement is read.

anvil click to hear

Cylindrical part that is attached to the frame of the micrometer to support the object to be measured; the object is placed between the anvil and the spindle.

thimble click to hear

Graduated cylindrical part that is activated by the finely threaded screw and measures the thickness with precision.

spindle click to hear

Cylindrical end of the finely threaded screw.

lock nut click to hear

Ring-shaped part that locks the finely threaded screw in its final position to preserve the measurement obtained.