![]() The ship's find dates to the 6th century BC. The earliest caliper has been found in the Greek Giglio wreck near the Italian coast. History A bronze sliding pinch scale (collected by the Yangzhou Museum) excavated from the tombs belonging to the Eastern Han dynasty (Gansenshan tombs in Hanjiang District, Yangzhou City) In this usage, caliper implies only the form factor of the instrument. In machine-shop usage, the term "caliper" is often used in contradistinction to micrometer, even though outside micrometers are technically a form of caliper. ![]() In loose colloquial usage, these phrases may also refer to other kinds of calipers, although they involve no vernier scale. The tips of the caliper are adjusted to fit across the points to be measured, and then kept at that span while moved to separate measuring device, such as a ruler.Ĭalipers are used in many fields such as mechanical engineering, metalworking, forestry, woodworking, science and medicine.Ĭaliper is the American spelling, while calliper (double "L") is the British spelling.Ī single tool might be referred to as a caliper or as calipers - a plural only ( plurale tantum) form, like scissors or glasses.Ĭolloquially, the phrase "pair of verniers" or just "vernier" might refer to a vernier caliper. Some calipers can be as simple as a compass with inward or outward-facing points, but with no scale (measurement indication). A common association is to calipers using a sliding vernier scale. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or an electronic digital display. The least count of vernier caliper is 0.1 mm. ![]() A vernier caliper clamping on an objectĬaliper(s) or calliper(s) are an instrument used to measure the dimensions of an object namely, the diameter or depth of a hole. ![]() For other uses, see Caliper (disambiguation). ![]()
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