A tool with such a complex name as a caliper allows measuring with an accuracy of 0.1 mm. And you can measure both external and internal dimensions of parts, as well as the depth of the holes.
How to learn to use the caliper correctly?
Before using, you need to carefully inspect the instrument, check it for accuracy. To do this, connect his jaws - the risks on both scales must match. The tenth bar of the vernier with the 19th bar of the millimeter scale should also be combined.
When measuring the dimensions with a caliper, do not allow the jaws of his jaw. Their position is fixed by a locking screw. While reading the reading, hold the instrument straight in front of your eyes.
The sequence of actions when measuring parts with a caliper:
- If you want to measure the external dimension of a part, clamp it between the lower jaws, holding the caliper in the right hand. With your thumb, move the frame until the jaw comes into contact with the object being measured, fix the position with the clasp with the thumb and forefinger of the right hand. Make sure that there are no skewed jaws and that the part passes between them, easily contacting the measuring surfaces.
- To remove the internal size of the parts, use sharpened sponges of the caliper. Blend them and insert into the hole details, then start to build sponges. Before taking the measurements, check that the same conditions are met as when measuring external dimensions.
- To measure the depth, place in the hole a depth gauge located at the end of the caliper. Spread the sponge until the depth gauge rests against the surface. The dimensions of the protrusions are determined in a similar way.
How to use a vernier caliper?
A certain complexity is the process of reading from the vernier caliper. It must be kept right in front of your eyes, since a different position will lead to inaccuracy.
Regardless of which parameter you measured (external, internal or deep), the reading process is always the same. First, determine the number of whole millimeters on the main scale, located to the left of the zero vernier.
After that you need to determine the number of fractions of a millimeter. On the nonius scale, find the bar that matches the main scale mark. If there are several such strokes, take a value that is closest to zero of the vernier. To get the full size of the part or hole, you need to fold the whole part of the millimeters and the tenths.
How to use the electronic caliper?
The electronic measuring instrument is much more convenient to use. With it you do not have to look at the marks on the scales, which is especially important for people with poor eyesight. Measuring with such a caliper is possible in both millimeters and inches. So you do not even have to look for information on how to use an inch caliper.
A new generation of this important tools is used in locksmith, construction, installation works. In a word, everywhere, where you need to know the exact dimensions. Moreover, it replaces the micrometer, because it shows very accurate measurement results.
You just need to clamp the detail as with a standard caliper and count the digits from the electronic screen on the instrument.
Disadvantages of electronic caliper:
- higher cost (several times higher than that of a conventional tool);
- special storage conditions - extremely careful. It can not be stored in a garage amidst dust and dirt, besides, not every ambient temperature will suit it;
- the need for periodic replacement of batteries (with active use they last for 2-3 months).