What is the smallest unit of vernier caliper for factory use?

According to the different grids, vernier calipers can be divided into ten-degree vernier calipers, twenty-degree vernier calipers, fifty-degree vernier calipers, etc., the vernier is 9mm for 10 divisions, 19mm for 20 divisions, and 49mm for 50 divisions.

There are two sets of movable measuring jaws on the main ruler and vernier of the vernier caliper, which are 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 outer diameter.

Scope of application: Vernier caliper, as a common measuring tool, can be used in the following four aspects: measuring the width of the workpiece; Measure the outer diameter of the workpiece; Measure the inner diameter of the workpiece; Measure the depth of the workpiece.

Digital yes, mechanical yes.

Vernier calipers with an accuracy of 0 05 mm and 0 02 mm are commonly used in practical work. They work on the same principle and are used in the same way as the vernier calipers with an accuracy of 0 1 mm presented in this book. Vernier calipers with an accuracy of 0 05 mm have 20 aliquot scales on the vernier with a total length of 19 mm.

If the 11th tick mark on the vernier is aligned with the master ruler, the decimal part will read 11 20 mm 0 55 mm, and if the 12th tick mark is aligned with the master ruler, the decimal part will read 12 20 mm 0 60 mm.

Generally speaking, there are n equal parts of the vernier on it, and their total length is equal to the total length of (n 1) equal parts of the scale on the ruler, if the minimum scale length on the vernier is x, and the minimum scale length on the main ruler is y

then nx (n 1) y, x y (y n).

The difference between the minimum scale of the main ruler and the vernier is.

y n is called the accuracy of the vernier caliper, which determines the number of digits in the reading result. As can be seen from the formula, improving the measurement accuracy of the vernier caliper lies in increasing the number of scales on the vernier or decreasing the minimum scale value on the master ruler. In general, y is 1 mm, n is taken and its corresponding accuracy is 0 1, 0 05 mm, 0 02 mm.

The accuracy of the mechanical vernier caliper with an accuracy of 0 02 mm can not be improved due to the limitation of its own structural accuracy and the resolution of the human eye on the alignment of the two engraved lines.

The accuracy of a vernier caliper is usually determined by its scale spacing and resolution. Vernier calipers are generally divided into two kinds, one is the threaded sock touch vernier caliper, and the other is the digital display vernier caliper. For threaded vernier calipers, generally their scale spacing is millimeters or inches, and their resolution is millimeters or inches.

As a result, its accuracy is generally millimeters or inches. For digital display vernier calipers, the scale spacing can be small, generally millimeters or inches, while its resolution can also reach millimeters or inches. As a result, its accuracy can reach millimeters or inches.

It should be noted that the accuracy of the actual use of the mid-range caliper is also affected by the user's usage habits, ambient temperature and other factors.