VERNIER CALIPER
Vernier
calipers are a type of measuring device used to measure precise increments
between two points. Vernier calipers work best when used between parallel
points, their intended design. Due to their precision they can be used across
less stable points of reference to a high degree of accuracy. Calipers come in
various sizes, but the most common is 6 inches. These tools are not intended to
measure large spans
MICROMETRE
A micrometer is a measuring device typically used
in machining and mechanical engineering to gauge or determine the precise
length of a short object or sample. Also known as a micrometer screw gauge,
most types of micrometers are calipers and are used alongside other
metrological measuring instruments, such as vernier and dial calipers
A dial gauge is a precision measurement
commonly used to measure machined parts for production tolerances or wear. Dial gauges are capable of
producing extremely fine measurement values; increments of 0.00005 inch
(0.001mm) may be possible with some gauges. Measurement inputs are transferred
to the gauge via a plunger, hinged lever,
or the jaws of a vernier. Plunger instruments are generally used in conjunction
with a clamp or stand which holds the gauge in a fixed position in
relation to the workpiece. The workpiece is then rotated or moved to take the
measurements
MULTIMETER
Multimeters are instruments
used to test, measure and monitor electrical devices, such as circuits,
electrical components or wall outlets. The two types of multimeter are analog
and digital, with digital being the most common due to accuracy and ease of
use. Analog ones have displays that use moving needles, while digital ones have
digital readouts
BORE
GAUGE
Bore
gauges are used to measure the inner diameter of bores or holes. Most have to
be used in conjunction with a micrometer or caliper and, if measurements are
performed correctly, can be as accurate as the tool used to measure the gauge.
Other models come equipped with a dial indicator to perform measurements
themselves. What ever the type of bore gauge used, all use similar simple
principles to obtain dimensional readings.
FEELER GAUGe
Feeler
gauges are used to measure the dimensions of a gap between two objects or
surfaces. Feeler gauges are uniform strips of steel or stainless steel with a
precise thickness, marked with their thickness dimension. They come
individually or as folding progressive sets of gauge blades hinged on the same
pivot pin or screw. As the name implies, the blades are individually inserted
into the gap being measured and slide back and forth until a slight mechanical
resistance is felt as the blade touches both surfaces simultaneously without
binding or moving the surfaces away from each other.
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