How to Read and Use a Micrometer

 Have you ever needed to make an extremely precise measurement? If you work in an industry that works with small parts or fittings, you more than likely have.

What Is a Micrometer?

Micrometers make precise measurements, ensuring a perfect fit for the task. Machine shops use micrometers to verify that their work meets specifications when fabricating custom parts. Pipefitters, mechanics and quality assurance professionals may also keep a micrometer in their toolbox to check tolerances tighter than 0.001 inch.

 

When To Use a Micrometer

Micrometers are used when very precise measurements are needed. There are several different designs, depending on what needs to be measured., for example, the size of a pipe, tool or object from the outside. They are also used to measure the inside width of a pipe, bearing or another hollow object or the depth of a hole or recess.

These are the tools you will reach for when accuracy is the most important factor. This is frequently true for machines with moving parts. Parts that move in and out of each other, like a piston, for example, need to remain in a steady, straight line. If these parts have even the smallest bit of sway, they can begin to fail. This is also true in other applications, such as the use of bearings. Other applications that require the most exact measurement are pipe fittings—especially if the pipe will be moving gases with very small and light molecules, like helium. Micrometers are also the preferred tool when measuring the thickness of items like sheet metals.

Also see: https://www.microntools.ru/c/mikrometry/

 

How Do I Read a Micrometer?

It is important to check if the micrometer is English or metric before using it for measurements. Make sure you are using a tool that has the same unit of measure as whatever you are already working with.

Once the micrometer is rotated into the proper measurement, the measurement can be taken. This requires adding together numbers found on the spindle and thimble which will give you the accurate measure. How to find the numbers you want will vary depending on the type and design of the micrometer. Instructions on how to read your micrometer will come from the manufacturer with your tool.

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