TOP 10 best 8-inch tablets: rating 2021-2022 and how to choose a convenient model with good technical parameters + customer reviews

The tablet market is replete with models with very different screen sizes. In this selection we will look at the best tablets equipped with an 8-inch display.

Typically, a tablet computer is purchased to solve a specific range of tasks. Most often, it is used to read books (and sometimes magazines), watch videos on YouTube and visit social networks. It is best to use a tablet with a not-so-small screen for these purposes. 8 inches is just right. Such a device still remains compact, so you can take it with you on the subway or train. But when choosing an 8-inch tablet computer, it is important not to make a mistake. In large retail chains and Chinese online stores you can find “tablets” equipped with weak components, which is why their operating system works with terrible “brakes” and freezes. If you don’t want to be disappointed, then take a look at our selection!

Alldocube iPlay 8 Pro

• Processor : MediaTek MT8321, 4 cores, 1300 MHz
• Display: 8 inches, IPS, 1280×800 pixels
• Operating system: Android 9

Price: from 6,000 rubles

This 8-inch tablet at a low cost offers buyers good parameters that are enough for comfortable use of the device every day. The device has an IPS matrix with HD resolution, a quad-core processor and 2 GB of RAM. The permanent storage here is 32 GB and, if necessary, it can be expanded by installing a memory card.

In addition, this model allows you to install a SIM card with 3G support and a call function. The remaining wireless modules are Bluetooth 4.0, Wi-Fi 2.4 GHz, GPS and Glonass. The cameras are modest - 2 MP on the back and 0.3 MP on the front. A 5500 mAh battery is responsible for autonomous operation.

Advantages:

• Good performance for everyday tasks.
• High quality display.
• There is support for voice calls.
• Good autonomy.
• High quality display.
• Metal body.

Flaws:

• Mediocre cameras.
• Does not support LTE.

How to choose and what to pay attention to?

Choosing an 8-inch tablet is not a difficult process if you understand what exactly you need from the technology.

For active games, you should choose models with a good processor and a lot of RAM, but for surfing the Internet and viewing documents, simpler models are suitable.

When choosing a tablet, you should pay attention to the following points:

• Operating system . It is better to give preference to the latest versions, as they support most applications and increase the performance of the model. However, not all processors are capable of supporting the latest version of Android.
• Amount of built-in and RAM memory . Not all tablets support transferring applications to a memory card, so you need to pay attention to the amount of memory already available. We should also not forget that the operating system itself will take about 10 GB. RAM is responsible for multitasking and response speed, so it is better to choose models with a minimum of 4 GB - modern applications require a lot of resources.
• Battery capacity . Autonomy depends on this parameter. Those who use tablets on long trips should give preference to models with energy-intensive batteries that maintain autonomy up to 18-20 hours.

Teclast P80X

• Processor: Unisoc SC9863A, 8 cores, 1600 MHz
• Display: 8 inches, IPS, 1280×800 pixels
• Operating system: Android 9

Price: from 6,600 rubles

Teclast P80X falls into the top 8-inch as an inexpensive device with good build and parameters adequate for its price. It has an IPS matrix with HD resolution, an eight-core processor and 2 GB of RAM. The permanent memory is available in two versions – 16 or 32 GB; if necessary, it can be expanded using MicroSD. This device has the ability to use a SIM card, which can not only work in LTE networks, but also allows you to make voice calls. Wireless modules also include Wi-Fi 2.4 GHz, GPS and Bluetooth 4.1. The device has a 4200 mAh battery and 3 MP cameras on the back and 0.3 MP on the front.

Advantages:

• High quality display.
• Good connection quality.
• Quickly picks up navigation satellites and accurately plots routes.
• Good performance for basic tasks.

Flaws:

• No voice speaker.
• Not the best autonomy.

Results

All the tablets discussed above were included in our rating for a reason. They all have good data and prices that will suit most people. Each model has its own “zest”, works very well and does not cause any complaints.

Today, an eight-inch screen is enough - you can watch movies, surf the Internet, draw, and do other interesting things. And by purchasing one of the models presented in the rating, you can be sure of its quality.

Huawei MatePad T 8.0

• Processor : MediaTek MT8768, 8 cores, 2000 MHz
• Display: 8 inches, IPS, 1280×800 pixels
• Operating system: Android 10

Price: from 8,000 rubles

The rating of 8-inch tablets for 2022 includes a new product from Huawei. It is officially sold on the Russian market and offers sufficient performance to solve everyday problems. But first of all, this model will appeal to those who are looking for a large display in a compact body. Due to the thin bezels around the screen, the MatePad T 8.0 is slightly larger than a 7-inch tablet, and it is also quite thin and light (including the metal body) - 8.5 mm and 310 grams. At the same time, the device looks quite modern and stylish.

In addition to a nice design, the tablet will delight you with an eight-core chipset, 2 GB of RAM and, at the user’s choice, 16 or 32 GB of storage. An optional SIM card with LTE is provided; if the device will only be used at home, you can save a couple of thousand and choose the Wi-Fi version. The module operates in two bands - 2.4 and 5 GHz, and also has Bluetooth 5.0, GPS and Glonass. The model has a slot for memory expansion, the 5100 mAh battery is designed for 12 hours of surfing or offline video viewing. Cameras – 5 and 2 MP.

Advantages:

• Nice screen.
• Good autonomy.
• Stylish appearance.
• Compact sizes.
• There is a children's mode.

Flaws:

• No Google services.

Review of the best manufacturers

The domestic market is represented by a large assortment of inexpensive, budget tablets made in China. However, they are not able to seriously compete with popular global manufacturers of household and computer equipment, and their only advantage is their low cost.

Which brand of tablet is better, which one is better to buy? If you need a device for watching media content or playing games, then it is preferable to buy tablets manufactured by Apple. The products of the world-famous Samsung company are perfect for solving a variety of business problems.

If you need an inexpensive, high-quality device to perform simple everyday tasks (watching videos, surfing the Internet), then you should pay attention to the products that are presented on the domestic market by Lenovo. Also, models that are quite good in terms of quality and performance are produced by a company called Huawei. To work with office applications as comfortably as possible, it is best to buy devices that are presented on the market by Microsoft.

BQ 8077L Exion Plus (2020)

• Processor: Spreadtrum SC9863A, 8 cores, 1600 MHz
• Display: 8 inches, IPS, 1280×800 pixels
• Operating system: Android 10

Price: from 8,500 rubles

The new product from BQ offers an excellent balance between price and parameters. It has an eight-core processor that can run simple games, has 3/32 GB of memory, supports two SIM cards (LTE) and can install a memory card. The model is available in several colors and has a metal body. The cameras here are 8 and 2 megapixels. Wireless modules – GPS and Wi-Fi 2.4 GHz. Battery – 4000 mAh.

Advantages:

• There is practically no third-party software.
• Current OS version.
• Two SIM cards with LTE.
• Good performance.
• The case is metal.
• Several bright colors of design.

Flaws:

• The speaker is turned back - the sound is not very comfortable.
• Modest autonomy.
• To install MicroSD you will have to give up one SIM card.

Inch system

Most jeeps use tires labeled 31x10.5R15.

31 here refers to the inch diameter of the wheel. One inch, as you know, corresponds to two and a half centimeters, and to be very precise, then 2.54 cm. In other words, after translation, D will become equal to 78.7 cm.

This marking is quite in demand because it is convenient, since it shows the size of the wheel with the disk parameters already taken into account.

The wheel diameter 31x10.5R15 is almost equal in size to a tire designated 31x10.5R16. The only difference will be a reduction in the tire profile by 2.5 cm.

10.5 – tire width in inches. But this value is not entirely accurate, since when converted from inches to traditional centimeters, the result is 26.5 cm.

However, when measuring this value with a regular ruler, the value will fluctuate within 23 cm. Only if the tire has a width index of 12.5 can we talk about a width of 26.5 cm.

You should always remember this nuance if you decide to install the maximum tire size in the arch of an SUV.

Alcatel 3T 8/9032X

• Processor: MediaTek MT8766B, 4 cores, 2000 MHz
• Display: 8 inches, IPS, 1280×800 pixels
• Operating system: Android 10

Price: from 9,000 rubles

The new product from Alcatel is an 8-inch tablet that has fairly typical parameters for its price tag, but at the same time offers several options that can make you buy this particular device.

The device runs on a quad-core chipset. It provides comfortable performance for everyday tasks and is also capable of running games at medium settings. The processor is supported by 2 GB of RAM, and the permanent storage is installed at 32 GB. If desired, it can be expanded using MicroSD. Access to the network is possible via Wi-Fi (works with two bands) or via SIM (LTE), in addition, wireless modules include Bluetooth 5.0, GPS and Glonass. The new product also received support for Miracast, which makes it possible to broadcast the screen to TVs.

The body of the device is plastic, the surface is textured and due to this the device fits perfectly in the hand. There are two colors on sale - gray and green. The model has a 4000 mAh battery, a USB-C charging connector, an intelligent sound amplifier, a children's mode and 5 MP cameras on the front and back.

Advantages:

• Ergonomics.
• Nice colors.
• Good performance.
• Dual-band Wi-Fi.
• USB-C support.
• Children's mode.
• Modern OS.
• Miracast support.
• There is face unlocking.

Flaws:

• Not the best autonomy.
• Charges in about 4 hours.

Device Description

Tablet PCs are devices that, in terms of their functionality, are somewhere between the familiar PC and smartphone. Compared to nettops or desktops, these gadgets use a more simplified OS. In addition, they are not equipped with a keyboard for data entry.

However, tablets are compact gadgets, and they have a touch screen for entering information. Some models of these mobile devices can work with SIM cards, so they can be used as a smartphone.

Lenovo Tab M8 TB-8505X/F (2019)

• Processor: Helio A22, 4 cores, 2000 MHz
• Display: 8 inches, IPS, 1280×800 pixels
• Operating system: Android 9

Price: from 9,500 rubles

This device appeared in 2022, but even today it is worthy of being included in the best 8-inch tablets due to its well-built hardware. The model runs on Helio A22, a quad-core processor that is enough for everyday use and running undemanding games. At the same time, it is energy efficient, allowing the 5000 mAh battery to survive about 18 hours while surfing.

The device turned out to be compact - its thickness is only 8.15 mm and its weight is 305 grams. It has support for Wi-Fi 5 GHz, Bluetooth 5.0 and optionally installs SIM cards that work in LTE networks. The model is sold in a memory combination of 3/32 GB and allows you to expand it using MicroSD if necessary. Cameras – 5 and 2 MP.

Advantages:

• Pretty fast.
• Holds the battery well.
• Doesn't get hot during games.
• High quality build.
• Nice appearance.

Flaws:

• Poor speaker placement - watching movies without headphones is uncomfortable.

Tire calculator

Diagonal 20 inches

When changing tires, the question often arises about the size of tires available for a particular car model. This is due to the fact that the tire diameter and its width must be within certain limits allowed by the car manufacturer. Most often, the latter places this information in the instruction manual or on the gas tank cap. Even with minor deviations from the recommended standards, fuel consumption increases and the accuracy of the speedometer decreases. If the selected size significantly exceeds the recommended one, the risks of accidents increase significantly.

Tire calculator to convert inches to mm

Conversion of inch tire sizes:

To simplify the determination of tire size, a special tire calculator was developed, allowing the user to do without the need to decipher the digital values ​​​​on the side surfaces of the rubber. Using such a calculator, the difference in tire sizes, profile height and other parameters are determined. In addition, such a calculator allows you to obtain other related information, for example, on deviations in the speedometer, changes in ground clearance, and so on.

DIGMA CITI Octa 80 (2019)

• Processor: Spreadtrum SC9863, 8 cores, 1600 MHz
• Display: 8 inches, IPS, 1920×1200 pixels
• Operating system: Android 9

Price: from 9,600 rubles

This tablet from Digma is one of the best in its price segment. It has a good processor, which is enough to run undemanding games, but its most important advantage is its memory capacity. Here it is 4/64 GB and for the money that’s a lot. In addition, the model allows you to install microSD here and supports two SIM cards, they can work in LTE networks and allow you to make voice calls. The best thing about the device is the screen – it has FHD resolution and provides excellent image quality. There is also a GPS module, Bluetooth 4.2 and Wi-Fi 2.4 GHz. Cameras - 5 and 2 megapixels, shoot modestly. The case combines metal and plastic, it is thick (10 mm), but the weight is small (325 grams), the reason for this is a small 4000 mAh battery.

Advantages:

• Performance is enough for gaming.
• Two SIM cards with LTE and calls.
• High quality high resolution display.
• Lots of memory.
• Metal body.

Flaws:

• Great thickness.
• Not the best autonomy.

Inches (inches), designation

Part of the world measures dimensions in inches and feet. In fact, meters, centimeters, and millimeters are usually used, too, but inches are more common. These are the units of measurement in the USA, Canada, and Great Britain. And the rest follow them. It so happened, for example, that the diagonals of televisions, screen sizes in smartphones, pipe diameters, shoe sizes (and much more) are indicated in inches. So you have to think about how to convert inches to centimeters, meters or millimeters.

Converting inches to centimeters (cm) is a simple task. You just need to remember that 1 inch is 2.54 cm

First, let's talk about how these inches are designated. In English it is inch. If there are a lot of them (inches), they write inches. In the abbreviated version, only the first two letters in are used. This appears in the text. There is also a graphic image - these are two lines at the top next to the number. For example: 3″, 5.2″. It reads 3 inches, five and two inches.

Samsung Galaxy Tab A 8.0 (2019)

• Processor: Snapdragon 429, 4 cores, 2000 MHz
• Display: 8 inches, TFT, 1280×800 pixels
• Operating system: Android 9

Price: from 10,000 rubles

Samsung Galaxy Tab A 8.0 (2019) is an inexpensive solution that will become a good companion in everyday life. The device has a good processor, which is enough to solve basic tasks and 2 GB of RAM. The 32 GB permanent storage can be expanded via microSD. This device has dual-band Wi-Fi, Bluetooth 4.2, as well as navigation modules - GPS and Glonass. The tablet turned out to be compact and quite light. The battery in it is set to 5100 mAh. According to the manufacturer, it will be enough for 14 hours of online video.

The model will also delight you with the presence of stereo speakers, 8 and 2 megapixel cameras, and there is also a children's mode. In it, parents can set the time for using the gadget, and the manufacturer has installed educational software for young users.

In 2022, Galaxy Tab A 8.0 was released in the Kids Edition, where the amount of pre-installed software for children was expanded, and it also included a bright shockproof case with a stand.

Advantages:

• User-friendly interface.
• Ergonomics.
• Good display quality.
• Long battery life.
• Good cameras (for a tablet).
• There is a children's version.

Flaws:

• Not designed for games, only the simplest ones for children.
• It takes a long time to charge.
• The stereo speakers are located on the bottom side, which is inconvenient when watching movies in landscape orientation.

Rating of the best 8-inch tablets for 2022

Tablet PCs are compact, portable devices that, when used together with a Bluetooth keyboard, can replace gadgets such as laptops or PCs. Eight-inch tablet computers are excellent devices that can be used for entertainment, Internet surfing, communication, and even for solving work issues and tasks.

Thanks to their small size, they fit easily into small bags or pockets. Tablets with a screen diagonal of 8 inches are perfect for students, everyday home use, and office workers.

Alldocube M8

• Processor: MediaTek Helio X27, 10 cores, 2600 MHz
• Display: 8 inches, IPS, 1920×1200 pixels
• Operating system: Android 8

Price: from 12,600 rubles

Our rating includes the rather old Alldocube M8 model, which, despite its age, still offers quite interesting parameters. It has a powerful processor with ten cores and 3 GB of RAM, which in total will provide good performance even for games. The screen here has FHD resolution and shows an excellent picture, and this device can also install two SIM cards with support for LTE networks and calls.

The M8 will be pleased with the presence of a dual-band Wi-Fi module, GPS and the ability to install a memory card independently of the SIM to expand the built-in storage, which has a capacity of 32 GB. Cameras – 5 and 2 megapixels, battery – 5500 mAh.

Advantages:

• Powerful processor.
• Supports two SIM cards with call and LTE functions.
• High quality screen with high resolution.
• Dual Wi-Fi bands.
• Long battery life.

Flaws:

• Old OS.
• No earpiece.

Prestigio Node A8 PMT4208 3G

Together with your tablet, you can immerse yourself in the world of quality content.
Excellent detail will allow you to enjoy the latest movies and mesmerizing photographs. Pros :

• the case has an anti-scratch coating that protects against mechanical damage and scratches;
• there is a SIM card slot;
• The battery capacity allows you to use the device throughout the day;
• The tablet's internal memory is 32 GB;
• There is a slot for an SD card up to 128 GB.

Minuses:

• RAM 1 GB;
• long charge.

Huawei MediaPad M5 Lite

• Processor: Kirin 710, 8 cores, 2200 MHz
• Display: 8 inches, IPS, 1920×1200 pixels
• Operating system: Android 9

Price: from 16,000 rubles

This 8-inch Huawei tablet went on sale back in 2019, but it remains quite relevant today. The first thing that attracts attention is the proprietary Kirin 710 chipset. It is enough for games and everyday use. It is helped by 3 GB of RAM and given the price this is not the most interesting value, but taking into account other parameters this can be forgiven. The model has 32 GB of permanent memory and can be expanded using MicroSD.

The tablet has stereo sound with Harman/Kardon tuning, a high-quality high-resolution display, LTE support and dual-band Wi-Fi. The battery in the model is set to 5100 mAh and when playing video it lasts for 9 hours. The cameras have proven themselves positively. There is a 13 MP module on the back and an 8 MP module on the front. Unlike most competitors' cameras, they can take quite good photos and FullHD videos at 60 fps.

A serious advantage of the model is the presence of Google services in it. MediaPad M5 Lite was released before sanctions were imposed against the company, so there are no difficulties with installing applications and using the Google store.

Advantages:

• Productive processor.
• Metal body.
• Great sound.
• Good cameras.
• Availability of Google services.

Flaws:

• For this money I would like more memory.
• Mediocre oleophobic coating.

Characteristics important for selection

Yes, the screen diagonal is an important point in this article, but still not the only one. There are many other criteria that can also affect which tablet you choose in the end.

To make it easier to understand, we will present you with a table with descriptions of all the main criteria.

Table No. 1. Criterias of choice

Taking into account the criteria will help you choose the best tablet for performing specific tasks.
I would also like to highlight such a criterion as the operating system. Of all the criteria that are taken as the main ones, this is the most changeable. It's all about the desire of manufacturers to please their customers. Today, there are three main operating systems that can be installed on a tablet.

1. Android
2. iOS
3. Windows.

The last OS on this list is found only in extremely expensive tablets with large inch screens. So our rating examined the remaining two operating systems. Apple fans will take the hardware of the same name and carry it with them all the time. Those who prefer Android may feel more free both in setting up and regulating the correct operation of the device.

Manufacturers of Android tablets

Xiaomi MiPad 4

• Processor: Qualcomm Snapdragon 660, 8 cores, 2200 MHz
• Display: 8 inches, IPS, 1920×1200 pixels
• Operating system: Android 8.1

Price: from 19,500 rub.

The Xiaomi MiPad 4 model received an 8-inch display, the popular Qualcomm Snapdragon 660 processor with Adreno 512 graphics, 3 gigabytes of RAM and 32 gigabytes of internal DDR3 memory. The main camera received a 13 megapixel module, the front camera was equipped with a 5 megapixel image sensor and a face unlock function. A serious 6000 mAh battery is responsible for the operating time. The tablet is equipped with a modern USB Type-C port, Wi-Fi 802.11ac, Bluetooth 5.0, GPS and LTE modules.

Advantages

• 13 megapixel main camera.
• Good stereo sound.
• Powerful battery.
• Built-in support for LTE and GPS.
• There is a USB Type-C port.
• Nice price tag.
• There is support for the latest Bluetooth 5.0 protocol.
• High resolution display.

Flaws

• Long recharging.

Inches vs mm. Where does the confusion come from and when is a correspondence table needed?

Pipes, the diameter of which is indicated in inches (1″, 2″) and/or fractions of inches (1/2″, 3/4″), are a generally accepted standard in water and water gas supply.

As a rule, the installation of inch pipes proceeds without difficulty, but when replacing them with pipes made of plastic, copper and stainless steel, a problem arises - the discrepancy between the size of the indicated inch (33.5 mm) and its actual size (25.4 mm).

Usually this fact causes bewilderment, but if you look deeper into the processes occurring in the pipe, the logic of the size discrepancy becomes obvious to a layman. It's quite simple - read on.

The fact is that when creating a water flow, the key role is played not by the external, but by the internal diameter, and for this reason it is used for designation.

However, the discrepancy between designated and metric inches still remains, since the internal diameter of the standard pipe is 27.1 mm, and the reinforced one is 25.5 mm. The last value is quite close to the equality 1”=25.4, but still it is not it.

The solution is that to designate the size of pipes, a nominal diameter rounded to a standard value (nominal diameter Dy) is used. The nominal diameter is selected so that the pipeline capacity increases from 40 to 60% depending on the increase in the index value.

In situations with plastic pipes, adapters are used to solve the problem of inappropriate sizes. If it is necessary to replace or connect inch pipes with pipes made according to real metric dimensions - copper, stainless steel, aluminum, both the outer and inner diameters should be taken into account.

Table of nominal diameter in inches

Table of correspondence between nominal diameter, thread and outer diameters of the pipeline in inches and mm.

GOST - state standard used in heat - gas - oil - pipelines

ISO - standard for designating diameters, used in plumbing engineering systems

SMS - Swedish standard for pipe diameters and valves

DIN / EN - the main European standard for steel pipes according to DIN2448 / DIN2458

DN (Dy) - nominal diameter

Tables with sizes of polypropylene pipes are presented in the following article >>>

Conformity table for nominal pipe diameters with international markings

Diameters and other characteristics of stainless steel pipes

HUAWEI MediaPad M5 8.4

• Processor: HiSilicon Kirin 960, 8 cores
• Display: 8.4 inches, IPS, 2560×1600 pixels
• Operating system: Android 8.0

Price: from 28,000 rub.

The Huawei MediaPad M5 tablet is equipped with an 8.4-inch high-resolution display and a powerful proprietary HiSilicon Kirin 960 processor with Mali-G71 MP8 graphics. It is supported in its work by 4 gigabytes of RAM and 64 gigabytes of internal memory. The main camera received a 13 megapixel module, the front camera was equipped with an 8 megapixel image sensor. A 5100 mAh battery is responsible for operating time. The case is metal, weight - 316 grams. There is support for A-GPS, accelerometer, gyroscope, compass, light sensor, as well as a modern USB Type-C port.

Advantages:

• 13 megapixel main camera.
• Good stereo sound.
• Still a powerful processor.
• A-GPS support.
• There is a USB Type-C port.
• Built-in LTE support.
• High resolution display.

Flaws:

• The branded shell may seem uncomfortable to some.
• High price tag.
• Long recharging.

Calculation of pipe volume

Determine the pipe radius R.

If you need to calculate the internal volume of a pipe, then you need to find the internal radius. If it is necessary to calculate the volume occupied by a pipe, the outer radius should be calculated. By measuring, you can easily obtain the diameter (both internal and external) and circumference of the pipe section. If you know the diameter of the pipe, divide it by two. So, R=D/2, where D is the diameter. If the circumference of the pipe section is known, divide it by 2*Pi, where Pi=3.14159265. So, R=L/6.28318530, where L is the circumference.

Find the cross-sectional area of ​​the pipe.

Square the radius and multiply it by Pi. So, S=Pi*R*R, where R is the radius of the pipe. The cross-sectional area will be found in the same system of units in which the radius value was taken. For example, if the radius value is in centimeters, then the cross-sectional area will be calculated in square centimeters.

Calculate the volume of the pipe.

Multiply the cross-sectional area of ​​the pipe by its length. Pipe volume V=S*L, where S is the cross-sectional area and L is the length of the pipe.

Huawei MediaPad M6 Turbo

• Processor : Kirin 980, 8 cores, 2600 MHz
• Display: 8.4 inches, IPS, 2560×1600 pixels
• Operating system: Android 9.0

Price: from 33,000 rubles

Huawei offers a wide selection of 8-inch tablets. Among this variety, an improved version of the M6 ​​was released with the Turbo prefix, which hints at its gaming performance. The device was announced in 2022 and received a top-end proprietary chipset, 6 GB of RAM and 128 GB of storage. The latter can be expanded via MicroSD if desired. The M6 ​​Turbo also features improved cooling and GPU Turbo 3.0 technology for even better gaming performance. To switch to gaming mode, the device received a special button on the body.

The powerful hardware of the device is complemented by a beautiful appearance - the tablet is made of a composite material reminiscent of glass. There is a gradient pattern on the back panel, and the body itself can be blue or red. There is support for LTE (optional), Bluetooth 5.0 and Wi-Fi with support for two frequency bands. The model was equipped with a 6100 mAh battery. You will be pleased with the sound in the device; it is represented by stereo speakers certified by Harman/Kardon. Cameras – 13 and 8 megapixels.

Advantages:

• Beautiful appearance.
• High performance.
• Efficient cooling system.
• Good cameras.
• 2K screen.
• Good sound.

Flaws:

• No fast charging.
• The case is easily soiled.

Markings and accuracy classes

There are 3 classes of thread accuracy: first (the coarsest), second and third (the most precise). The choice of one class or another depends on 2 factors: the dimensions of the thread diameter taken from the table, the fluid pressure in the pipeline. The higher the thread class, the greater the fluid pressure it can withstand.

Dimensions are checked for compliance with a certain accuracy class using special gauges. This method allows you to most reliably determine whether the thread matches the required dimensions, but it is more labor-intensive. This method is effective in conditions of multi-batch production of parts that require high precision. When the production volume is not so large and there are no increased requirements for accuracy, the thread sizes are controlled as follows:

• The dimensions of the outer diameter are measured using calipers, micrometers and other mechanical measuring instruments. The readings are then checked against a reference table.
• The pitch dimensions are determined by applying special dies, for example an inch thread gauge. Then the resulting number of turns per inch is correlated with the value of the inch thread size table. The easiest way to measure the thread pitch is to take a ruler, mark 25.4 millimeters on it and count how many turns are included in this segment. Let us immediately note that this is the roughest method and is not suitable for measuring threads with the third and second class of accuracy.

Let's look at the designation of inch threads in technical documentation using an example:

The letter "G" means that the pipe thread is cylindrical. According to Russian standards, a conical pipe is designated by the letter “K”.

The number "2" indicates the size of the outer diameter. The unit of measurement is inches. Thread sizes and their options are fully regulated by GOSTs and are listed in special tables.

The letters "LH" indicate that the thread has a left-hand screw direction. The absence of this designation indicates the right direction.

The number “2” characterizes the accuracy class. The table of deviation limits is indicated in GOST. The number “40” is the size characterizing the length of screwing.

Apple iPad Mini (2019)

• Processor : Apple A12 Bionic, 6 cores, 2000 MHz
• Display: 7.9 inches, IPS, 2048×1536 pixels
• Operating system: iOS

Price: from 34,500 rubles

The 2019 iPad Mini is a long-awaited new product that has become a revival and update of Apple's compact tablets. The design of this device is quite standard for brand technology - a thin body (6.1 mm), light weight (300 grams), a Home button with Touch ID at the bottom of the display and large frames. This device has a 3.5 and a proprietary Lightning connector. The device is available in three colors.

There are no questions regarding the operation of the model - everything works quickly and stably due to excellent optimization of hardware and software. The permanent memory is available in 64 and 256 GB versions; there is a version with LTE or Wi-Fi only; the sound is provided by stereo speakers. The battery is designed for 10 hours of battery life. The cameras here are 8 and 7 megapixels; by tablet standards, the shooting quality is excellent.

One of the main features of the iPad Mini (2019) is support for the proprietary Apple Pencil stylus, which significantly expands the model’s capabilities and makes it an excellent option for digital artists.

Advantages:

• Great screen.
• Dimensions and weight.
• Performance.
• Convenient software for the stylus.
• Good cameras.

Flaws:

• The stylus is purchased separately and is expensive.
• Autonomy is less than stated.
• There is no 128 GB version.
• There are wide frames around the screen - it looks old-fashioned.

Screen sizes from inches to centimeters

To characterize the equipment, use the tablet screen size in cm or inches diagonally.
Commonly accepted units of measurement came from Europe, where for a long time each country and even region used its own value of the same inch. Monitor inches

Therefore, the normal screen size for a smartphone of 8″ should be converted into centimeters for clarity and calculate the width and height of this monitor.

The size of an inch is currently reduced to a single value and is equal to 2.54 cm. An 8″ tablet has a diagonal of 20.32 centimeters.

How to calculate the dimensions of the sides

The dimensions of length and width with a known diagonal are calculated using the Pythagorean theorem. Math lovers can create a system of equations based on the aspect ratio and calculate the display size. Calculations are made as follows:

A2 + B2 = C2;

A : B = 4:3.

The following values ​​are used here:

• A – screen width in centimeters or inches;
• B – height;
• C – diagonal.

Tablet options

The system of equations for determining the size of the sides of the monitor in this case was compiled for old square screens with an aspect ratio of 4:3. This proportion standard in cm and inches was used for a long time for ray tube televisions.

The display is only 25% longer horizontally than vertically. Other types of monitors are calculated in inches and centimeters using the same system. You can determine how many centimeters are in oblong screens in the same way, only the numbers are replaced by the corresponding ones. The easiest way to make calculations is on a calculator, using such types as, for example, an engineering one.

Contrast

Those who do not want to sit through calculations can find the necessary conversion table on the Internet. For an 8″ monitor, or 20.32 centimeters, below are the dimensions of the length and height of the display in centimeters and inches. All that remains is to select in the table the aspect ratio that the tablet screen has.

To determine the size of the tablet screen, you should find out how many centimeters the diagonal is. Then calculate the length and height. The 4:3 monitor is very different from other models. It is wide, almost square. It is good for watching amateur videos, working with tables, making graphs, and watching analogue television programs.

Chinese version

You can determine the length and height of the screen in inches. Then, multiplying by 2.54, determine how many cm this tablet is.

Changing the size

Some car owners specifically change the radius of the wheels, and such changes are divided into several categories:

• Increasing the width - it is permissible to increase this indicator by no more than 24mm, but only while maintaining the same height. Otherwise, the wheel will rub against the body, which will quickly render it unusable. An example will be the diameter of an R15 tire with a dimension of 185/65. After enlargement, the characteristics will be 195/65 (24mm is the maximum expansion value, the average is 12). After this, the braking distance will decrease and the car will drive a little softer, but the price of purchasing new tires will increase.
• Height - the installation will slightly increase the cross-country ability, but it is impossible to increase the indicator much. This will lead to rapid abrasion of the tires on the car body.
• Wheel offset - some car owners try to increase the width of the rim, and it turns out that the wheel ends up protruding slightly from the arch. Such a change is detrimental to the car and will quickly lead to suspension failure. The optimal wheel offset is regulated by the manufacturer, and changing it is not recommended.

The bottom line is the following: when choosing new wheels and tires, the optimal solution would be a selection based on factory recommendations. To change tire parameters, you need to clearly understand what this could mean during vehicle operation.

Installing and selecting modified tires on your own, without consulting a specialist, is not recommended, and can lead to failure of the entire vehicle.

Conical pipe thread R / BSPT [ edit | edit code ]

Pipe conical threads are used in conical threaded connections, as well as in connections of external conical threads with internal cylindrical threads, standardized by GOST 6357-81 “Basic standards of interchangeability. Cylindrical pipe thread." Based on BSW thread (English British Standard Whitworth) and compatible with BSP thread (English British Standard Pipe thread). Designated as BSPT (English British Standard Pipe Taper thread. The seal is achieved by compressing the thread at the point of the threaded connection when screwing in the fitting.

The following standards apply to threads:

• GOST 6211-81 “Basic standards of interchangeability. Conical pipe thread";
• ISO R7;
• DIN 2999;
• BS 21;
• JIS B 0203.

Thread parameters

Inch thread with a taper of 1:16 (cone angle φ = 3°34′48″). The profile angle at the apex is 55°.

Symbol according to GOST 6211-81: letter R for external thread and Rc for internal thread, numerical value of the nominal thread diameter in inches and letters LH for left-hand thread. For example, a thread with a nominal diameter of 1 1/4″ is designated as R 1 1/4

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