What Is A Micrometer Screw?

If you need to measure the section or thickness of any part, you are interested in knowing what a micrometer or micrometer screw is. With this piece it is easy to obtain precise data in a very comfortable way, thus improving the results of any job.

One of the most common tasks when doing any carpentry, plumbing, machining or similar work is taking measurements. Something that is essential, if we want to do a good job, since the easiest way to ruin any of these tasks is to do everything by eye and bypass the measurement tools.

This leads us to a second question, such as the need to use measurement tools that are adapted to what we need to measure. A fundamental question if we want to obtain precise and quality measurements.

To measure the thickness of screws, nuts, tubes, sections and other elements, the most recommended tool is the micrometer screw. A tool that, although it is not very common, the truth is that it is very useful in these small jobs. Something that you can check if you keep reading our article, where we discover the secrets of this add-on and how it can help you make any task easy, with maximum precision.

Parts of a micrometer

One of the things to know before starting to measure with a micrometer is the parts that this tool has. Depending on whether we are dealing with a digital micrometer or a traditional one, we will see certain variations, which affect the way we read the measurement result or what we can measure.

The first thing we find in this product is the area of ​​the body or frame. This piece is the one that opens the screw area, and it is where we will place what we want to measure . It is located between two elements, called anvil and spindle. The anvil is the fixed part, while the spindle is the mobile one. This is moved by means of the ratchet, which moves it inside the body until it joins the anvil.

The micrometer is finished off with two elements. One of them is the scale, which varies according to the unit of measurement that we are going to use. The other element is the graduated drum, where we are going to read the measurement. These two pieces are replaced by a digital LCD display when using a digital micrometer.

This would be the approach to an outside micrometer. The parts of an interior screw vary a bit, since the type of measurements to be made are different. For this reason, the anvil and the spindle that we have discussed become two elongated tabs , which are inserted into what we want to measure. As always, it is important to choose eyelashes of a suitable size according to the size of the object, although we will talk about this in more detail when we explain how it is measured with one of these products.

Types of micrometers

Since we are not always going to measure the same thing, there are different types of micrometers. The one we have defined in the previous point is the outside micrometer, which measures the total thickness of a given part. If what we want to measure is the inner section of a tube , for example, then we will need an inner micrometer, which differs by opening from the inside to the outside. The third option is the so-called depth micrometer, with which to comfortably measure this parameter by means of rods, which move with the movement of the wheel already commented inside the object to be measured.

Regarding the form of measurement, when the micrometer screw uses the aforementioned wheel, we are talking about an analog one. If it is replaced by an LCD screen, we would be facing a digital micrometer. The latter has the advantage of eliminating display errors and generally offering greater accuracy in operation. It all depends on the quality of the chosen product and the performance that it is capable of offering us.

As a third option, we have the dial micrometer, which changes the measuring drum for a dial with a needle, where the measurement we make is shown. However, this does not show a measurement in millimeters, but rather the variation between a model part and a similar one, being used to measure the margin of error in manufacturing processes. For this reason, its scale uses percentages, which indicate how much thicker or thinner the measured object is compared to the original piece.

How to measure with a micrometer

Once we are clear about the types and parts of the micrometer, it is time to take action. To measure with a micrometer, it is essential to choose the appropriate piece both for what we want to measure and the size of the object. A thin micrometer is of little use if we want to measure the size of a thick pipe, just as a huge micrometer is not useful to calculate the thickness of a screw .

Take, for example, a Playmobil One Two Three figure . If we want to measure the thickness of one of its arms, we will need an outside micrometer, duly regulated for a reduced size. We will introduce the arm between the spindle and the anvil and we will turn the ratchet until the arm is correctly positioned, taking the measurement reading. The same process is used to measure the thickness of the body or head.

However, if what we want is to measure the interior space of his head, the one that we filled with plasticine when we were little, we will need an internal micrometer and rather small, since the Playmobil are not especially big heads. To proceed, we will place the two measuring tips inside the head and we will open it until we reach the limit. We finish the work by making the corresponding reading, to have the correct measurement.

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