# How to use a caliper?

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How to use a caliper?

The caliper is used tomeasure the distance (length), depth, and if necessary, the diameter of various parts and objects, if they are small in size. Calipers are of several types. They differ in that different calipers are able to measure objects of different sizes. Also the difference is in what accuracy in the measurement they will observe.

Before using a caliper, you need to study its structure. In the photo you can see these parts:

1. 1. The bar. This is the ruler itself, to which are plotted the size of 1 millimeter each. The length of the standard scale is 150 millimeters or 15 centimeters. It is this maximum size that a measurable object can have. There are such types of calipers, the length of the bar in which exceeds the mark of 15 centimeters.
2. The frame of the caliper (movable). With this framework you can move the sponge. Movable frame allows you to expand or narrow the sponges of the caliper to the size of the measured object. Due to the special screw (8) the movable frame can be fixed in the position that corresponds to the size of the measured object.
3. Scale with divisions. Due to this scale it is possible to clarify and refine the size of the measured object in the form of an integer.
4. "Sponges" for measurement (internal). Using the jaws, the size of the desired object inside is measured. For example, glasses. Sponges are bred to the walls of the glass, only inside.
5. "Sponges" for measurement (external). Thanks to such sponges, it is possible to measure the object from the outside. They need to be closed so that the left and right sponges are in tight contact with the walls of the measured object from the outside.
6. The ruler for measuring the depth is a depth gauge. Such a device can measure the depth of a certain hole. Also a depth gauge is needed to refine the dimensions of the various projections, which can not be measured with a caliper.
7. Auxiliary scale or vernier. This scale is located below the base. The size of each vernier division is 1.9 millimeters. The scale itself has 10 such divisions. Accordingly, the length of the entire vernier is 19 millimeters. These dimensions are relevant only for the caliper of the series ШЦ-1, which is depicted in the figure. With the aid of such an auxiliary scale as the vernier, you can more accurately determine the size of the measured object, taking into account a tenth of a millimeter.
8. A screw that clamps the sliding frame of the caliper. This part of the caliper helps to fix the movable frame so that after measuring the desired object, do not lose the available parameters.

The video on how to use the caliper, located on this page, can help you a lot. You can also read the instruction on how to correctly check the accuracy of this item.

In order to measure the desired objectcalliper, its (object) should be taken with your left hand. The caliper is better to hold in the right hand. Then you need to move the sponges (outer) to the size of the object. They are divorced with the vernier. Since this auxiliary ruler is movable, it helps to extend the sponge to the width of the measured object. Sponges should be in tight contact with the end points of the measured object.

Code size is measured, it is required to fixsponge screws. When you do this, the item can be postponed. Now look at the scale with the markings. There you can see the length of the object. On what number (by how many divisions) the nonius - an auxiliary ruler has shifted to the right side, so many tenths of a share will contain the size of the measured object. Now you know how to use a caliper, and accordingly, and apply it in the necessary for this purpose.