Best micrometers for 2020

From time to time, situations arise when it is necessary to accurately measure miniature parts (drill diameter, wire cut, etc.). In this case, a ruler and caliper will not work to obtain the required data. The dimensions are commensurate with thousandths of a millimeter, and such accuracy is not available to the devices indicated above.

In such situations, the micrometer comes to the rescue. This is a special tool designed for ultra-precise measurements. The maximum error is up to 0.002 mm.

A universal measuring device is essential for determining highly accurate dimensions of the smallest parts. In comparison with similar instruments, it allows you to obtain data with an accuracy of one hundredth of a millimeter (micron). Such accuracy is necessary when measuring the thickness of the part, diameter, section. This accuracy is important for controlling the size of the part when making a copy and fitting elements.

What are they?

There are many different types of micrometers. They are designed for specialized applications and have excellent reading systems. Main types:

1. Smooth with a graduation of 0.1 μm. With their help, measurements of the covered objects are carried out using the absolute method. Quality control of tools is carried out in accordance with GOST 6507-90. The size of the original part is determined depending on the angle of rotation of the drum. The longitudinal main scale is located on the stem. It is used to count the number of complete revolutions. The surface of the device is made of hard alloys. The smooth parts of the screw have a diameter of 8h9, or 6h9. They come in two classes of accuracy. Each has its own margin of error. The setting is carried out by setting measures. Devices with a range from 25 to 300 mm have one measure, which corresponds to the lower end of the range. For tools over 300 mm, two additional setting measures are included. If the range is 0 to 25 mm, they are absent.
2. Electronic digital. The main supplier is the PRC, but Russian enterprises are also singled out. They have no significant differences. The basis of the design is a micrometric screw-nut pair. In comparison with the mechanical ones, there are no scales on the stem and drum. The result is displayed on the LCD. It also displays in which system the calculations were made. In certain cases, the function of displaying the charge level is available. As soon as it becomes necessary to replace the power supply or recharge, the corresponding icon lights up on the screen. The device has additional useful functions. These include taking measurements in millimeters and inches and setting zero. The latter allows you to measure in relative and absolute reference systems. A number of models have such a function as holding the obtained result ("HOLD"). Additional options have separate keys. Ease of use and reading of the results obtained, two reference systems, additional quality options that allowed electronic micrometers to win their niche. The main disadvantage is the high cost.
3. Lever micrometers. They have a graduation rate of 0.001 to 0.002 mm. It is used to measure precision parts with direct evaluation and comparison with a standard used in precision engineering.To get started, it must be placed horizontally. Horizontal and vertical position of the scale of the reading device is allowed. In such micrometers it is lever-toothed. The contact surface is hardened with hard metal. The contact surfaces are installed in corundum alloys. Due to the heat-insulating linings, the influence of hand heat on the performance is excluded. The retraction of the movable heel is carried out using a cage.
4. Arrow keys. The size is determined using a dial gauge. They are used in serial and piece production during plumbing and repair work. With their help, the level of wear of parts is determined, where high accuracy is important. With a pointer mechanism there can be lever devices with a movable and replaceable heel.
5. Leafy. It is used to measure the thickness of sheets and tapes. Taking into account the purpose, the micrometer has acquired an elongated shape, since it is more comfortable to take measurements in this form. The dial for taking the reading makes the use as comfortable as possible. The measuring surface is made of hard metal.
6. Pipe. With its help, the thickness of the pipe walls is determined. Cylindrical measuring tips allow you to achieve the most accurate result when taking measurements of curved surfaces.
7. Wire and thread gauge. Designed to determine the thickness of the wire, the diameter of the balls.

How does the device work?

Mostly for household purposes, a smooth micrometer is used. It includes the following elements:

1. Staples The main component of the tool. A high degree of rigidity is important for her. This is due to the fact that the slightest deformation will lead to a decrease in accuracy and an error will arise.
2. Heels. Depending on the model, it can be removable or molded into the base. The first option allows you to use a larger measuring range.
3. Micrometric screw. It moves with the rotation of the ratchet.
4. Locking mechanism. It is a clamp with a screw design. It is used to fix an object.
5. Stem with scales (main with millimeters and additional with halves).
6. Drum. Tenths and hundredths of a millimeter are marked on it. The end part acts as a pointer on the stem.
7. Reference. With its help, the accuracy of the tool setting is checked. Not every model is equipped with it.

How to work with a micrometer?

A mechanical smooth tool is given as an example. It is most often found in everyday life. With its help, it is allowed to define a calculation in two frames of reference. For absolute, the object is placed between the support post and the screw. The result is obtained based on the readings of the scale. For a relative system, the size of nearby objects is revealed, and calculations are made.

1. Ensure accuracy is not compromised. To do this, tighten the screw, and check the coincidence of zero marks on the two scales.
2. For objects not exceeding 25 mm, check is carried out with standards.
3. If a mismatch is detected, the stem is adjusted using a special key.
4. Before proceeding to the beginning, the screw is unscrewed to a mark exceeding the size of the part.
5. The object is placed between the screw and the stop.
6. The screw is clamped with a ratchet until a characteristic sound is produced. Stop after third click.
7. Read off indicators from 3 scales. Two of them are on the drum and one on the stem. To the full millimeters from the upper scales, add half of the second.
8. The final stage is to add values ​​from the drum scale in accordance with the division value.
9. The results are summarized.
10. In order for the measurement to be as effective as possible, it is recommended to carry out several operations and calculate the average value.

What to look for when choosing?

In order to purchase a micrometer corresponding to the specifics of the activity, you need to know the basic parameters. Only in this case there will be no problems during use.

1. Scope of application. There are 4 groups of tools for parts with a cross section of 0-25, 250-50, 50-75, 75-100 mm. In order to be prepared for any situation, it does not hurt to have a representative of each of the groups with you. This is especially true for turners.
2. Measurement step. For a digital device, its values ​​are 1 μm (0.001 mm). On the shelves you can find other indicators. As a result, the parameter is checked in practice and in the instructions.
3. Permissible error and accuracy class. There are two classes of accuracy. The error ranges from 2 to 50 mm.
4. Ergonomics. The weight of the tool ranges from 190 grams. up to 2 kg. The comfort of use depends on this, especially if the work is carried out for a long time. In such cases, the minimum weight is preferable so that the hand practically does not get tired. The length can be from 155 to 305 mm. It depends on it in what conditions measurements can be made, as well as whether it is possible to put it in a pocket. The fit is comfortable in the hand. When taken in the left hand, nothing should cover the screen. The right one effortlessly reaches the main controls and the ratchet. For greater convenience, the parts in the hands are covered with an anti-slip coating and a relief surface. This reduces the risk of falling.
5. Transportation. The protective cover will reduce the risk of breakage when used in the workplace. If the work involves frequent travel, models with a special case with a soft lining are preferable.

Best micrometers for 2020

Inforce 06-11-44

Instrument of the Russian company Inforce with a measuring range of 0 - 25 mm. The error is only 2 microns. Due to the length of 15.5 cm and weight of 190 grams. it is convenient to carry it with you in your pocket, use it in hard-to-reach places and for several hours. At the same time, the hand does not get tired at all. The model is powered by a battery. The embossed handle does not slip in the hand. The choice is available in metric and imperial readings.

Advantages:

Disadvantages:

Harden 580832

Used to determine the exact linear dimensions by the absolute and contact method. They have a wide range of applications, from locksmithing to mechanical engineering. The measuring range is 0 - 25 mm. The tool is made of high quality steel. The large, wear-resistant scale is laser engraved. Its accuracy is 0.01 mm. The tool is delivered in a plastic case, which will greatly simplify its storage and transportation to the workplace.

Advantages:

Disadvantages:

MATRIX 317255

The micrometer is focused on parts in size from 0 to 25 mm, the measurement step is 0.01 mm, the error does not exceed 2 microns. Tool steel was used in the manufacture. The device is aimed at those who do not care about maximum accuracy. A good solution for a car locksmith, modeller, repairman and an irreplaceable assistant for a home craftsman.

Advantages:

Disadvantages:

CALIBRON 121893

Smooth tool for determining the outer dimensions of a workpiece with a measuring range of 25 - 50 mm. The measuring surface made of hard metals will serve for a long time with careful use. Installation in the initial position is facilitated by setting measures. The micrometer belongs to the first class of accuracy. Its error is 0. 002 mm. The report is made on the scales on the stem and drum.

Advantages:

Disadvantages:

CHIZ MK-25 0.01

The tool is manufactured in accordance with GOST 6507-90 in Chelyabinsk. It belongs to the 1st class of accuracy. Measurement range: 0 - 25 mm. The margin of error is 2 microns. The base of the micrometer is a bracket; a screw pair of a micrometer screw and a nut has become the conversion device. The brace houses the heel and stem. The micrometer will become an irreplaceable assistant for the home craftsman and in production.

Advantages:

Disadvantages:

MEGEON 80800

Electronic measuring equipment with high accuracy rates. Its measuring range is from 0 to 25 mm. The steel base is covered with ABS plastic to prevent slipping in the hand. The embossed wheel and ratchet are comfortable to use. Two buttons are allocated for control. They turn on and zero the readings. The micrometer is powered by a battery.

Advantages:

Disadvantages:

NORGAU IP65 041057025

A quality product for measuring parts from 0 to 25 mm. In the manufacture of surfaces, hard alloys were used, which are carefully ground to each other. The electronic mechanism is protected from dust, dirt and water splashes according to the IP 65 standard. The readings are displayed on the LCD in such a way that it is easy to take them even for people with low vision. The device has buttons for the options for switching on and off, changing the metric system, resetting the readings and saving the results.

Advantages:

Disadvantages:

MTI-20 0.01 Tulamash

The prism micrometer is designed to measure the outer diameter of a three-blade cutting tool. For this, he has 2 scales. The accuracy of the stem scale reaches 0.5 mm, on the drum - 0.01 mm. To determine the size, add 2 values. A ratchet is used as a limiter for measuring forces. When the maximum is reached, it emits characteristic sounds.

Advantages:

Disadvantages:

The presented Top includes the best representatives of the computing industry. They have proven themselves on the positive side in their business and earned recognition. The tool is recommended for purchase by home craftsmen and people who are engaged in car and motorcycle repairs.