The vernier caliper is a measuring tool for measuring the length, the inner and outer diameter, and the depth. The vernier caliper consists of a main ruler and a vernier attached to the main ruler. The main ruler is usually in millimeters, while the cursor has 10, 20 or 50 compartments. According to the different compartments, the vernier caliper can be divided into a ten-degree vernier caliper, a twenty-degree vernier caliper, and a fifty-degree vernier caliper. The vernier caliper has two movable jaws on the main ruler and the vernier, the inner measuring claw and the outer measuring claw. The inner measuring claw is usually used to measure the inner diameter, and the outer measuring claw is usually used to measure the length and the outer diameter.
Vernier caliper
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