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How to take inside measurements using a

dial caliper

Shop for Dial Calipers

Inside distances, such as the diameter of a hole, are measured using the upper jaws of the dial caliper. Inside distances, such as the diameter of a hole, are measured using the upper jaws of the dial caliper.

Step 1 – Zero caliper then insert jaws into hole

Close the jaws completely so that the caliper reads zero. Insert the upper jaws into the hole you are measuring.

Step 1 Close the jaws completely so that the caliper reads zero. Insert the upper jaws into the hole you are measuring. Step 2 Open the internal jaws using the thumb screw, until the outside of each jaw touches the edge of the hole.

Step 2 – Open jaws

Open the internal jaws using the thumb screw, until the outside of each jaw touches the edge of the hole.

Step 3 Turn the lock screw to tighten the jaws so that you can remove your object and take your reading. Step 4 Read the measured value (See How to Read a Dial Caliper).

Step 3 – Turn lock screw

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

Step 4 – Read measured value

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