How to use micrometer?

There are situations when you need to know the exact size of the part, right up to hundredths or even thousands of millimeters. Such, for example, instruments of accurate mechanics, in which almost every micrometer is important. For this, and serves the device with the same name in which the emphasis falls on another syllable.

How to use micrometer?

Rules for using different species

In the simplest version, the micrometer is a measuring device for at least three line. One, basic, considers whole millimeters. The second, offset on half a million relative to the first, allows you to measure the width (thickness, height) of the part with an accuracy of up to 500 microns. Third, threaded, has a point of reference (zero), with respect to which the drum rotates. It turns around the main axis of the device – and has 50 divisions similar to millimeter. In this case, the accuracy of measurements is 10 μm (0.5 mm / 50 = 0.01 mm). The simplest analog (mechanical) micrometer operates on a screw pair representing microtic, in which the parts measured in thickness, wire or steel sheet segment are clamped.

How to use micrometer?

Device

Micrometers intended for specific applications, its own characteristics. So, Smooth micrometer, removing dimensions in the range of 0-25 mm with a mechanical or digital alter, consists of the following details.

  • The bracket is the carrier element for the fixed part;
  • emphasis – fixed at the end of the bracket and strictly perpendicular to the surface of the clamping part;
  • Screw – long brackets up to dozen times, spinning on a fixed screw basis and also perpendicular to the clamping part; It moves within the measuring zone equal to 2.5-7.5 cm mechanical micrometers;
  • stopper – does not give a screw to hang out;
  • Measuring base (stem) – contains two rough measurement scales (with an accuracy of half a million); It has the form of a hollow cylinder, in which a screw pair rotates with the help of special fasteners;
  • The drum is the basis for an accurate measurement that rotates with the screw and contains the precision measurement scale (up to 0.01 mm);
  • ratchet – limits the force applied to the measured part;
  • The reference part for calibration is used to adjust the incredited micrometer; Comes complete with the device.

How to use micrometer?

Accuracy class

In everyday life bigger than 0.01 mm accuracy is hardly useful. But in production – especially at the factories of accurate mechanics – and in narrow-profile masters the norm is considered to be the price of division in 1 μm (0.001 mm) or 100 nm (0.0001 mm), achieving mainly on micrometers with a digital scale. An even higher accuracy class used in the production of nanomaterials used, for example, in chips – Dutch is not micrometers, but completely different mechanisms and devices.

How to use micrometer?

How to use micrometer?

How to arrange micrometers of other species?

All varieties of micrometers operate in the same principle. The most famous area of ​​application is the definition of defective parts that can cause breakdowns in the mechanisms where they are applied. But measurement accuracy – up to 10 microns – is achieved in various ways.

  • In the lever micrometer, the twinkling drum is replaced by an arrow pointer. The advantage of the arrow meter is to increase the speed, throughput at the stage of checking the parts by the micrometer: not needed in the divisions.

How to use micrometer?

  • Micrometer with countable mechanism (watch or dial-type) – It seems that used in electromechanical meters and cassette (or coil) tape recorders – calibrated and used similarly to the classical. Rotate numbers in the counter is steady. The change of one digit another is divided into 10 additional divisions (positions) – thanks to the meters of the counter, which increases the accuracy of measuring from ten to one micron.

How to use micrometer?

  • A particularly accurate sensor is installed on digital models, giving calibration in units of microns. Dignity – the measurement accuracy is 1 μm, the errors are practically excluded. Such a product is not inferior to the previous type – the instrument readings are read almost instantly. There is no need to put the testimony – sensors and microprocessor successfully perform this work “on the fly”.

How to use micrometer?

  • Above digitally in terms of accuracy are laser micrometers. The laser beam is overshadowed by a detail, his high-precision photomatritsa catches it, sending the resulting rejection of the beam on the ADC and further – on the processor and display. Measurement takes less than 1 s.

But the laser micrometer does not tolerate the jokes and vibration, requires regular adjustment. It is even critized to the slightest dust, and the internal dimensions of the parts will not be able to measure.

How to use micrometer?

For specific tasks

A highly specialized micrometer inherent in its own characteristics.

  • Casomouser has truncane-conical nozzles, allowing to determine the gap in the grooves, the sizes of the tooth of the gear or gear. Theoretically, you can remake the usual (smooth) micrometer to the toolver, installing special nozzles for a screw and heel. In shape they resemble the secret screws of the screws – in the simplest case, they can be made precisely from such screws, welding them then to the heel and screw. When measuring, the length of the nozzles is subtracted from the one that the device is measured in such a way. This will introduce additional action when calculating. In addition, the source micrometer must have a screw stroke of a screw no 2.5 cm, and more, for example, by 5-7.5 cm.

Do not do amateur – better buy a ready-made micrometer-pricer, on which the manufacturer has already been configured.

How to use micrometer?

  • The “tube” micrometer is in demand for employees of the control offices. They measure the thickness of the pipe walls to determine their wear. It has adapters, allowing to measure the diameter and thickness of the pipe walls covered with rust. These nozzles also allow you to find out in detail the dimensions of the battered pipe, which has a variable wall thickness. The “pipe” device is easy to reject pipes and tubes that have deviated from the normative wall thickness still at the casting and rolled steel stages. From the usual (smooth) micrometer tubular is characterized by special focus (heel), not perpendicular, and parallel to the clamping pipe. This probe touches the inner surface of the pipe point, which ensures the accuracy of the measurement. The actions during the measurement are no different from the actions with a smooth micrometer: the same screw and drum with a ratchet, when you trigger which you get the desired diameter or thickness of the pipe wall.

How to use micrometer?

  • The lester thickness of the heel is smaller than the usual micrometer, But the screw in diameter roughly coincides with the screw screw. Graduation here is much more accurate than the usual product. The bracket from the “leafomer” is far stretched toward, like a long U-shaped tube. Nozzles for such a device are supplied in two versions: narrow (for the corresponding parts and sheets) and elongated (measured the thickness of wide and elongated blanks).

Measure the usual micrometer sheets is not recommended – it will sell them with its narrow screw. Here you need a surrounding area at times big than when removing measurement from bearings and rolled.

How to use micrometer?

  • The universal micrometer includes nozzles – for details of different types. It measures the diameter of the bearing ball, and the diameter of the sheet is equally accurate. It has a large reserve of the screw of the screw – up to 10 cm, which makes it “omnivorous”: they can be measured the ball, sheet, the transverse dimensions of the profile pillars and structures – and even measure the head of the railway rail from all sides.

How to use micrometer?

  • Wire – suitable for wire, rolled, balls and other small parts with a round cross section that is easy to disrupt the climb of the usual micrometer.

How to use micrometer?

  • Prismatic – makes it possible to measure the thickness of the knife blade. Nozzle to it is performed in the form of a circuit repeating the tire with a 30-degree descent. Simply put, this is a double heel with skates. The screw at the same time pointed, but his edge is a little posted. Included the nozzles and under the other angle of descent, including for “single-sided” sharpening blades, for example, like the knives of lawn mowers.

How to use micrometer?

  • The groove micrometer measures the depth and diameter of the holes drilled in the walls and supports. Measurement is performed by a special retractable probe having a small hat at the end. This allows the wizard, without reversing or not drilling a hole again, pick up for it a suitable self-tapping screw.

How to use micrometer?

  • Threaded device freezes the depth of the thread. It includes screwed (and screwed) nozzles with cone-shaped ends either with gloves in the form of a bomb.

How to use micrometer?

  • Multish-hard micrometer has an additional scale. Almost he reminds Chatnizubeher, but he has one significant difference. It’s like two (three, more) micrometers in one – the same, classic micrometric mechanisms on a common, stretched far away in the direction of the bracket. Having a stroke of up to 10 cm, you can measure the blank of the corner, brand or rail profile in one reception.

Accelerated measurement is also amenable to any profile designs with a complex cross section, resembling a letter or simple hieroglyph.

How to use micrometer?

  • Hot focused – Attribute of the Metallurgical Plant. It allows you to measure the thickness of just a frozen product in the form. Instead of a screw in such a device included a marking wheel. The heel is spring-loaded, has a transversely elongated (and not round, like a simple product). The principle of operation – the micrometer is rolled along the sheet or profile, allowing you to detect defects (chip, curvature) on the entirely cast blank.

How to use micrometer?

  • The nutrometer – works with the machine when the part is pulled out on the inner surface. Its probes having a smooth curvature and decreasing by the end of the planting size are inserted into the processed piece of the pipe or tube, or any other part that rotates in the locking machine. It accelerates Tokar’s work – do not need to remove the detail from the Pathist to make sure whether the part has taken the desired form.

How to use micrometer?

Whatever the micrometer – when buying a product, ask the seller to check. An essential superiority will be checking the diameter or thickness of the same part with the help of another same or similar to the device.

Clear control when buying is the key to a successful and long use of the product.

How to set up and check accuracy?

This measuring device is from among those that the measurements are calibrated at mandatory, as it is about microns, and not about millimeters. Carrying it without a cover or case, a random drop can bring down the accuracy. The method of verification, despite the seemingly newcomer, is very simple. To adjust to zero a conventional mechanical micrometer 0-25 mm, follow several steps.

  1. Make sure the device is clean – especially check the retaining surfaces on the heel and the screw. To remove the saidium and fat tax, the clean sheet of paper is best – place it between the terminals of the device and tighten the drum until it stops.
  2. Split drum back. If necessary, repeat this step several times, moving the paper until the surfaces are not cleaned. Adjusting without cleaning these surfaces is impossible – solid particles will not allow to put accuracy.
  3. Check the reliability of fixing brackets and heels. They should not hang out. If this is not the case – the tool is subject to repair, in which the bracket is re-fixed again, and the parallelism of the presser surface of the screw and heel is renovated.
  4. Tighten the drum to the stop without the part – until the 3rd, 4th or 5th clicks. Make sure all the scales got up exactly at zero marks.
  5. If, for example, the mark on the drum does not coincide with the zero – adjust the basis (stem), taking it using a special switch supplied in the kit. The key is used on the device in which the screw is retained using an additional nut or secondary (reference) screw with a special deepening.
  6. Check the measurement accuracy by pressing the micrometer the reference part – on average, up to 4th clicking. It is for it that the device itself can calibrate. Micrometer is successfully configured and ready for work.

Important! If you drop the device – it will not hurt him. Calibrating its zero marks, you can use them again. Such instruments are made of high quality tool and stainless steel.

How to use micrometer?

How to measure?

In the drum of the device, a ratchet is mounted. When measuring the thickness or diameter of the part, as soon as that slightly squeezed with the clamps, the first click. This is the “moment of truth” – stop turning the drum and count the resulting division size. The instruction is extremely simple and looks like this:

  1. Place the part between the screw and the focus;
  2. Scroll through the drum until the ratchet click.

Further twisting of the drum with force after clicking the ratchet is able to break the screw grooves drum. With repeated repetition of this incorrect step, the micrometer will begin to be labeled – the carving of the drum is spoiled. No most accurate calibration on zero will make the accuracy of measurements on it the pristine, installed by the manufacturer. Measure the damaged device will not be possible.

How to use micrometer?

How to use micrometer?

As for the fine wire made of soft metals and alloys – for example, copper, aluminum, tin, lead or wire solder – the micrometer’s legs will suck such a wire by 0.01-0.15 mm, and the measurement result will be inaccurate. Organized steel and winning alloy is much more resistant to pulling. Such a wire without any problems will endure multiple measurements, not flattering on the diameter either on the microns – provided that you did not continue to compress it after the control click of the drum.

Features of determining indications

Remove the instrument readings is also extremely simple. For example, you measured the diameter of wrapped steel wire, At which, after clicking when the drum rotation, the following marks were installed:

  • 3 mm on the first line;
  • between 0.5 and 1 mm on the second;
  • “Kratilka” stopped at 5 divisions.

Accordingly, the diameter of your wire rod is 3 + 0.5 + 0.05 = 3 mm 550 μm (microns). In millimeters – 3.55 mm. The full turn performed by the accurate measurement drum is 0.5 mm.

How to use the micrometer correctly, you will learn in the video below.

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