Measurement of small dimensions without a micrometer. Drawing, description

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Measurement of small dimensions without a micrometer. home workshop

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It is possible to measure the diameter of a hole or a rod, to determine the size of the gap with an accuracy of 0,1 mm, not only with the help of a micrometer, caliper or feeler gauge. Each of the measuring tools offered here is easy to make at home in just an hour.

Measurement of small dimensions without a micrometer

The first tool in this series is for determining the diameter of a hole. It is a flat triangular wedge with a 10:1 height to base ratio of the equilateral triangle that forms it. It is best to cut it out of a metal ruler or square, but millimeter divisions can also be applied to any plate. How to use such a device is clear from Figure 1.

The tool for measuring external dimensions is based on the same principle (Fig. 2). It will give you the same accuracy as a caliper.

Well, if you need to know the exact size of the gap between two parts, make the fixture shown in Figure 3. These are two dozen safety razor blades blunted on fine emery, assembled in a bag. The thickness of each is known - either 0.08 or 0,1 mm.

And the last is the measuring caliper (Fig. 4). Outwardly, the tool resembles wire cutters: the same short jaws and long handles. The ratio of short and long leverage is 1:10. A metal ruler with a millimeter scale automatically scales exactly ten times - each division becomes equal to 0,1 mm.

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