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Vernier Caliper: Micrometer

The document discusses two measurement tools: the vernier caliper and micrometer. The vernier caliper uses a main scale and vernier scale to take accurate linear measurements through mechanical interpolation, reducing measurement uncertainty. The micrometer incorporates a calibrated screw and is used to measure mechanical components by placing the item between the screw and anvil and moving the screw until it lightly touches the item. Both tools provide precise dimensional measurements.

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100 views1 page

Vernier Caliper: Micrometer

The document discusses two measurement tools: the vernier caliper and micrometer. The vernier caliper uses a main scale and vernier scale to take accurate linear measurements through mechanical interpolation, reducing measurement uncertainty. The micrometer incorporates a calibrated screw and is used to measure mechanical components by placing the item between the screw and anvil and moving the screw until it lightly touches the item. Both tools provide precise dimensional measurements.

Uploaded by

Abomb
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Flores, Ashley M October 2, 2018

AMTE 117 – 8B Mr. Noel Tolentino

VERNIER CALIPER
Is a visual aid to take an accurate measurement reading between two graduation markings on a linear
scale by using mechanical interpolation; thereby increasing resolution and reducing measurement
uncertainty by using Vernier acuity to reduce human estimation error.
The Vernier is a subsidiary scale replacing a single measured-value pointer, and has for instance ten
divisions equal in distance to nine divisions on the main scale.

Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 mm ± 0.02 mm by adding 3.00 mm
(left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is
that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned
lines between the two scales. The 0.02 mm engraving indicates the caliper's accuracy and is the
"Vernier constant" for this scale.

MICROMETER
Is a device incorporating a calibrated screw widely used for accurate measurement of
components in mechanical engineering and machining as well as most mechanical trades, along with
other metrological instruments such as dial, vernier, and digital calipers. Micrometers are usually, but
not always, in the form of calipers
The spindle is a very accurately machined screw and the object to be measured is placed between the
spindle and the anvil. The spindle is moved by turning the ratchet knob or thimble until the object to be
measured is lightly touched by both the spindle and the anvil.

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