Rating of the best bore gauges for 2022

On sale you can see a huge number of measuring devices. In rare cases, a caliper is used. Using the apparatus, the distance between two planes is measured. Also, the tool is suitable for taking readings from the inner diameter of workpieces. The fixture accuracy is 0.01 mm.

Device Information

Nutromer is intended for measurement of diameters of round details. The kit includes interchangeable rods of different calibers. They act as an extension and head.The last element has the following components:

• changing tip;
• locking mechanism;
• kernel;
• micrometric type bolt;
• cap;
• drum.

Scope of use

The design of the device is simple and reliable. Therefore, it is used in a wide variety of industries. The measurement technique is universal. Many industries require an accurate reading system. Gauges are used in the following areas:

1. Engineering. This industry produces a huge number of rotating mechanisms. All parts and assemblies must have certain dimensions and exact contact with each other, minimum clearances. Therefore, devices with a minimum error are required.
2. Vehicle repair. Here, measurements are carried out to determine the degree of wear of parts. According to their testimony, they decide whether to repair equipment or not.
3. metalworking industry. Here, workers drill holes and mill parts. Therefore, the help of inside meters is required.

In most cases, a bore gauge measures the diameters of the internal cavities of metal parts after turning and milling. A device is required in manual work, when it is necessary to remove a thin layer from the workpiece in order to achieve high accuracy. All this is typical for the metalworking industry.

Making a workpiece with high precision dimensions is not so easy. The product must be in good condition. The qualification of the specialist is also of great importance. CNC machines are more efficient. Computer technology will allow you to achieve a more accurate result.

With the help of a caliper, you can check other devices. All measuring tool must be accessed to work. To do this, it must be certified.

Measurements are taken with two rounded tips placed at an angle of 180⁰. Almost all fixtures have a mechanism for centering measurements. All movements of the tip are fixed on the instrument. Nutromerov allow to carry out the most exact measurements. This is their big plus. Low cost and long service life make the tool indispensable for professionals. However, it must be remembered that the caliper requires careful handling and special care. After a breakdown, the product is disposed of. Restoration of the instrument is not possible. Buying a new device will be the best way out.

Care must be taken when measuring the soft parts of the workpieces. During the procedure, strong pressure occurs, which can deform the surface of the part.

Product varieties

Nutromers are of two types:

• devices of micrometric design;
• indicator products.

Both types of devices need to be carefully examined. This will enable the user to select a product with the desired parameters and characteristics.

Micrometer fixtures

The device has a distinctive feature. It is a micrometer screw. A special drum is firmly fixed on it. There is also a measuring tip with a stem. The design of the caliper resembles a micrometer. Measurements can be carried out in the range from 50 to 4000 mm.

During reading, the device is set in a perpendicular position relative to the workpiece. One side of the device is securely fixed to the edge of the hole being measured. The second part moves in a diametrical position. During the procedure, the micrometer screw must be adjusted without fail. This is necessary to obtain more accurate measurements.

The error of micrometric calipers is very small. Their accuracy is 0.01 mm. This is a very good indicator. The size of a circle is obtained by adding two values. The first is taken from the reading of divisions on the scale. The second indicator is taken from the stem length and end values. These devices are equipped with an additional setting measure. It is for validation purposes. Also, the mechanism can adjust the accuracy of adjustment at the workplace. The micrometric device is stored exclusively in a case. It protects the product from dirt and nicks. The case will also extend its lifespan.

At the time of purchase, the tool must be checked. Efficiency must be at a high level. The check is done in several steps. The tool is first visually inspected. The buyer evaluates its configuration, marking and manufacturer. After that, you can proceed to the correct interaction of the parts of the device.

The caliper is being tested in operation. It is advisable to have an instrumental microscope with you. It will help to reveal the size of the strokes of the stem and drum. The result obtained must be compared with the factory indicator. Then the distance from the rod to the end of the drum is checked.

The next step is to examine the radius of curvature of the measuring surface of the micrometer head and tip. The measurement error is determined by means of a horizontal optimeter. The difference between the total size of the head and the extensions that are attached to it is calculated.

The procedure is completed by identifying the beating of the moment of touching the measuring plane of the device and the dimensions of the setting measure at the points of its working surface.

Display devices

Inside gauges of this type have their own design. Manufacturers have installed 2 working elements on them.This includes the measuring system and indicator head. The latter has a dial made in the form of a watch. This design is considered the most common. The tool is designed to measure the diameter of workpieces from 6 mm and more. The error is small and can be in the range from 0.15 to 0.025 mm.

The indicator has 2 scales (one small, the other large). The first denotes the number of whole revolutions of the second dial. You need to be very careful when taking data. The second scale shows the size within 1 mm at a division of 0.01 mm. Therefore, according to the number of notches of the small dial, the measurement is calculated. On a large scale, fractions of a millimeter are counted with an interval of 0.01. The movement of the rod is about 10 mm. The value can be increased if the production process requires it. For such purposes, a set of rods of different sizes is included with the product.

When buying an indicator option, like a micrometric one, you can check for serviceability. Here the process is much easier. First of all, the buyer needs to make an external inspection of the product for integrity and the absence of traces of mechanical influences. Then the equipment, marking and manufacturer are checked. Some users prefer indicator types of bore gauges. Others like the micrometric option. The opinions of the people were divided. Everyone chooses a device according to their needs and requirements.

Nutromer should be checked for performance. To do this, you need to test it. You need to complete the process by comparing the metrological and technical parameters of the device.

The best bore gauges in 2022

Budget

Indicator inside gauge 50-100 mm, 0.01 mm CHIZ NI 43159

With the help of this device, measurements of internal cavities, gaps between mechanisms and parts are carried out.The device is easy to use, has a handle with a special relief, which is not subject to slip when in hand. This makes it possible to carry out measurements with high accuracy.

• easy to operate;
• special relief on the handle;
• high accuracy.

• not detected.

AutoDelo indicator 40161 silver

Instrument manufacturer Autodelo now also offers instruments for internal measurements. Determining the internal dimensions of cavities and parts under various housings is done by point-to-point contact, which has measurable surfaces using the relative method.

The countdown is made using an indicator having a clockwork. A special centering bridge allows you to combine the measuring line and the axial plane of the hole being measured. The interchangeable rod allows you to adjust the range of the desired measured dimensions. It is included in the scope of delivery. The total range reaches 50-160 mm, the tool is supplied in a plastic case.

The cost is 4 thousand rubles.

• has a clock mechanism;
• replaceable rod;
• high precision.

• not detected.

NI TEHRIM T050021 indicator

An indicator type device allows you to obtain the dimensions of internal cavities and parts. The measurement is made thanks to a two-point contact, which has measurable surfaces of the relative method. The countdown is made using a clock mechanism. A special centering bridge allows you to combine the measurement line and the axial plane of the hole being measured. The required dimensions can be adjusted using the special rods included in the scope of supply.Certified rings or blocks of end measures allow such adjustment.

The cost is 4.6 thousand rubles.

• has a clock mechanism;
• special centering bridge;
• accuracy of measurements.

• not detected.

NI 6-10 0.01 Caliber

An indicator-type tool allows you to make accurate relative measurements of internal cavities and mechanisms. With the help of a measuring tip, you can take measurements in hard-to-reach places where you cannot use a tape measure, micrometer, caliper, and the data is more accurate compared to them.

A precision type device allows you to determine the internal dimensions of mechanisms (the gap between two parallel planes, grooves, diameters, surfaces). Structurally, the indicator caliper combines hourly and digital indicators, which have the designations CHI and QI. It is also equipped with a lever system that includes movable and fixed rods for measurement, replaceable special inserts.

The cost is 4.9 thousand rubles.

• accurate relative measurements of internal cavities and mechanisms;
• combines hour and digital indicators;
• interchangeable special inserts.

• not detected.

Devices of the middle price segment

MEGEON 80055 silver/black

This device is used when carrying out high-precision measuring work, when measuring internal mechanisms, groove diameters and other parameters. It has a measuring force of 2.5 to 5 N and a probe length of up to 6 mm. The mass of the device is small, so it is comfortable to use in different conditions.

Cost - 8 thousand rubles.

• an inexperienced user will be able to deal with the device;
• has a high rate of accuracy;
• high measurement speed.

• not detected.

NI 50-100 0.01 CHIZ* indicator

The indicator-type device has a purpose - measuring internal cavities, the groove of parts. If it is not possible to make a measurement using a ruler, tape measure, conventional devices, this device comes into play. When taking measurements, there is an error (0.01 mm).

To ensure accurate data, you must purchase a machine made directly by the manufacturer. When purchasing such a device, the guarantee is confirmed by Russian standards GOST 862-82. Together with the meter, the buyer also receives documentary evidence in the form of appropriate certificates.

The indicator type product has two components:

1. indicator head. It has a mechanical scale in the form of a circle, an arrow moving left and right to show the desired value. With this pointer head, measurements can be easily read without the need for special knowledge.
2. Rod for measurement. It consists of two working elements that have contact with the groove or the boundaries of the cavity of the measured part. The rods lead to the inner head by means of a mechanism connecting them.

The measurement range can be adjusted using inserts of the required dimensions. Calibration is carried out using rings or gauge blocks. The tool is equipped with a handle that is protected from the effects of temperature, preventing heating. This avoids errors and inaccuracies during measurement work.

The cost is 14.5 thousand rubles.

• there is a comfortable handle;
• relevant certificates;
• the guarantee is confirmed by Russian standards.

• not detected.

NI 18-50 Range

An indicator-type apparatus is used to carry out measuring work on the internal parts of a part using the relative method. The wedge gear and the reporting mechanism interact with each other, forming its basis. You can adjust the required dimensions using certified rings and a gauge block.

The cost is 17.4 thousand rubles.

• quality tool;
• comfortable in using;
• accredited tool.

• not detected.

HM 100-160 Range

This micrometer type apparatus is used to measure the internal parts of the part. Measurements are made using the micrometer head of the measurement tip, extensions. They are the main components of the device. The head and tip are composed of hard alloy. This provides good wear resistance and long service life.

The cost is 17.9 thousand rubles.

• hard alloy;
• good wear resistance;
• long service life.

• not detected.

High cost devices

MICRON electronic NI 10-18 0.001 MIC

The indicator type tool has a dial that allows you to get accurate results when measuring. Used to obtain accurate data on the dimensions of the inner diameters, the groove of the part, measure the width and length.

With the help of an inside gauge, the depth of ledges, grooves, and various holes is measured. The error in obtaining the result is minimal. The device can be used in industry and in various industries. It is included in the State Register.

The cost is 68 thousand rubles.

• accurate results;
• the error is minimal;
• included in the State Register;
• versatile at work.

• not detected.

NM 50-1300 0.01

With the help of the meter, you can control the linear dimensions of the workpieces using various machines and equipment for metal processing.

The purchase of a micrometer type device guarantees high precision data on the workpieces being machined. The error during measuring work is small, up to 0.01 mm, most parts do not require more accurate data. The delivery set includes extension cords that allow measurements from 50 to 1300 mm. A wooden box is provided for storing tools and extension cords, which protects against mechanical impact.

The cost is 49.5 thousand rubles.

• There are extension cords included.
• the error is small;
• There is a wooden box for storage.

• not detected.

It should be noted that this device can only be used by specialists with a certain experience who have the necessary knowledge on the correct use of inside gauges.