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How to take outside measurements using a

dial caliper

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Dial calipers are most commonly used to measure outside distances such as width, length or diameter. These distances are measured using the outside measuring faces of the caliper, the lower jaws. Dial calipers are most commonly used to measure outside distances such as width, length or diameter. These distances are measured using the outside measuring faces of the caliper, the lower jaws.
Step 1 Hold the object you are measuring in one hand, and tighten the lower jaws around the object by adjusting the thumb screw with your other hand.

Step 1 – Position object between jaws

Hold the object you are measuring in one hand, and tighten the lower jaws around the object by adjusting the thumb screw with your other hand.

Step 2 Turn the lock screw to tighten the jaws so that you can remove your object and take your reading. Read the measured value (See How to Read a Dial Caliper).

Step 2 – Turn lock screw

Turn the lock screw to tighten the jaws so that you can remove your object and take your reading.

Step 3 – Read measured value

Read the measured value (See How to read a metric dial caliperor How to read an imperial dial caliper).