Must Know ノギスの使い方 References

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Introduction to Vernier Caliper

If you are into woodworking, engineering, or any other field that requires precise measurements, then you must have heard about vernier calipers. Vernier calipers, also called ノギス in Japan, are measuring devices used to accurately measure the dimensions of an object. In this article, we will discuss the basics of using a vernier caliper in 2023.

Parts of Vernier Caliper

Before learning how to use a vernier caliper, it is essential to know about its parts. A typical vernier caliper consists of a main scale, a sliding jaw, a vernier scale, and a locking screw. The main scale is the long ruler-like part of the caliper that displays the measurements in millimeters or inches. The sliding jaw is the moveable part of the caliper that slides along the main scale. The vernier scale is the small scale that measures the fractions of a millimeter or inch. The locking screw is the knob that locks the sliding jaw in place.

Using a Vernier Caliper

To use a vernier caliper, first, clean the jaws with a clean cloth to ensure accurate measurements. Then, place the object you want to measure between the jaws of the caliper. Make sure that the object is held firmly between the jaws. Next, slide the sliding jaw along the main scale until it touches the object. The point where the sliding jaw touches the main scale is the measurement in millimeters or inches. To get a more accurate measurement, use the vernier scale. The vernier scale measures the fractions of a millimeter or inch. The vernier scale has ten divisions, each division being 0.1 mm or 0.01 inch. To read the vernier scale, align the zero mark on the vernier scale with the closest mark on the main scale. Then, look at the vernier scale to see which division aligns with a mark on the main scale. The number of the aligned division is the fraction of a millimeter or inch.

Locking the Vernier Caliper

After taking the measurement, it is essential to lock the vernier caliper to prevent any changes in the measurement. To lock the vernier caliper, turn the locking screw clockwise until the sliding jaw is locked in place.

Using the Depth Gauge

Some vernier calipers come with a depth gauge that measures the depth of a hole or slot. To use the depth gauge, extend the depth gauge from the bottom of the caliper until it touches the bottom of the hole or slot. Then, read the measurement on the main scale and vernier scale, similar to the process used to measure the length of an object.

Using the Beak Jaws

The beak jaws of a vernier caliper are used to measure the diameter of a hole or the thickness of an object. To use the beak jaws, open the jaws wide enough to fit around the object. Then, close the jaws until they touch the object. Read the measurement on the main scale and vernier scale.

Conclusion

In conclusion, using a vernier caliper is a simple process that requires practice and patience. Remember to clean the jaws before taking measurements, and always lock the caliper to prevent any changes in the measurement. With these tips, you can accurately measure the dimensions of an object using a vernier caliper in 2023.