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Cordless screwdriver. Power tools are included in the list of technically complex goods Electromechanical qualities of a screwdriver

Description of the equipment: ............................................... ................. 3

Model Specifications.................................................................... 4

Scope of delivery: ............................................................... ................. 4

Delivery set:

1. Cordless drill

2. Battery

3. Charger

4. A set of bits

5. Instructions for use and maintenance

Safety regulations.

Attention! Power tools are hazardous equipment. When using power tools, to avoid the risk of electric shock, injury, or fire, STRICTLY follow the following basic safety precautions. Read and remember these instructions before operating the power tool. Keep the safety instructions in a safe place.

SAVE THESE INSTRUCTIONS

Workplace

Contain workplace clean and well lit.

Cluttered, poorly lit workplaces are a cause of injury.

Do not use power tools in explosive environments such as where flammable liquids, gases, or dust are present. Power tools create sparks that can ignite dust or steam.

Keep children and visitors a safe distance from operating power tools.

Avoid distractions as this can cause you to lose control of your work and cause injury.

electrical safety

Before switching on, check whether the supply voltage of your power tool matches the mains voltage; check the serviceability of the cable, plug and socket; in case of failure of these parts, further operation is prohibited.

Double insulated power tools do not need to be connected to an outlet with a third ground wire. Power tools without double insulation must be connected to a grounded socket

Avoid body contact with grounded surfaces such as pipes, radiators, stoves, and refrigerators. The risk of electric shock increases dramatically if your body comes into contact with a grounded object. If the use of a power tool in wet places is unavoidable, the current to the power tool must be supplied through a special breaker device that turns off the power tool in the event of a leak. Electrician's rubber gloves and safety shoes will further enhance your personal safety.

Do not expose power tools to rain or damp conditions. Water entering a power tool greatly increases the risk of electric shock.

Handle the power cord with care. Never use the cord to carry power tools or pull the plug from a socket. Keep cord away from heat, oily liquids, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase the risk of electric shock.

When operating power tools outdoors, use extension cords specifically designed for outdoor use.

Personal safety

Stay alert, watch what you are doing at all times and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs or drugs that slow the reaction, as well as alcohol or drugs. This could result in serious injury.

Wear appropriate clothing. Loose clothing, jewelry, or long loose hair can get caught in moving parts while the power tool is running. Keep your hair, clothing, and gloves away from moving parts. Hands must be dry, clean and free from traces of oily substances.

Avoid sudden activation. Make sure the On/Off switch is in the "OFF" position before plugging in the power tool. Do not carry power tools with your finger placed on the on/off switch.

Remove adjusting and/or setting keys before switching on the power tool. A left key caught in the moving parts of the power tool may result in damage to the power tool or serious injury.

Keep your balance secure. Use good support and always keep your body firmly in balance. Proper footing and balance allow for reliable control of the power tool in unexpected situations.

Use equipment that ensures your safety. Always wear safety goggles. A respirator, non-slip safety boots, hard hat, or ear protection must be used for the appropriate conditions.

Safety Rules for Working with a Cordless Drill Driver

Do not drill into walls or other surfaces where electrical wiring runs. If this situation is unavoidable, turn off all fuses and/or automatic fuses through which electrical power is supplied to this work area.

If the drill/nozzle gets stuck while working, turn off the drill immediately, release the drill and then continue working.

Wear noise canceling headphones when using a power tool for extended periods of time. Prolonged exposure to high intensity noise can cause hearing loss.

Always wear safety glasses when using this power tool. Use a respirator for work that generates dust.

Hold the workpiece securely when drilling. Never hold a part in your hand or with your feet. Poor fastening of the part can lead to deformation of the tips leading to loss of control over the tool and possible injury.

Never leave the on/off key locked in the "ON" position. Before turning on, make sure that the on / off key is in the “OFF” position. Accidental starts may cause injury.

Position yourself so that you are not caught between the tool or accessory handle and walls or poles while you work. If the accessory is bent, this will cause kickback from the power tool and may cause injury.

Only branded chargers may be used, chargers from other manufacturers may cause a fire.

Only branded batteries may be used, batteries from other manufacturers may cause a fire.

Do not overload the cordless drill driver, use the product strictly for its intended purpose.

Rules for the operation of equipment:

Using the Power Tool

Use clamps, clamps, a vise, or other method to securely hold the workpiece. Holding the part with your hand or body is not secure and could result in loss of control, tool breakage, or injury.

Do not overload the power tool. Use power tools appropriate for your job. The right power tool allows you to get the job done better and ensures greater safety.

Do not use the power tool if the "ON/OFF" key does not work. Any power tool with a defective on/off switch is HIGHER dangerous and must be repaired before use.

Disconnect the plug from the power source before making any adjustments, changing accessories or accessories, or when storing the power tool. These preventive safety measures reduce the risk of starting the power tool accidentally.

Keep power tools out of the reach of children and other people who are not familiar with power tools. Power tools are dangerous in the hands of unskilled users.

Carry out the necessary maintenance of power tools in a timely manner. Properly maintained power tools with sharp blades make the job easier and more efficient and increase safety. Any change or modification is prohibited as this may result in damage to the power tool and/or personal injury.

Regularly check tool settings and check for deformation of working parts, breakage of parts, and conditions of the power tool that may affect the incorrect operation of the power tool. If there is damage, have the power tool repaired before starting work. Many accidents are caused by poorly maintained power tools. Establish a periodic service schedule for your power tool.

Use only accessories recommended by the manufacturer for your model. Accessories that may be suitable for one power tool may become hazardous when used on another power tool.

Rotation speed adjustment:

The cordless drill is equipped with an "On / Off" button, which has the ability to adjust the rotation speed. The rotation speed depends on the intensity of pressing this button, i.e. the harder you press, the higher the rotation speed and vice versa.

Right-left rotation switch:

Has three positions:

Left hand rotation.

Right hand rotation.

· Intermediate (in the middle) position, which provides blocking of inclusion.

Attention! It is strictly forbidden to switch the direction of rotation until the product comes to a complete stop!

The range of cordless drills includes two-speed products. Low RPM provides low RPM and high torque for heavy duty applications and screwdriving applications.

The high speed selection is for light duty applications at high speeds and low torque.

Attention! Clearly set the position of the speed of rotation, avoid the intermediate position: this leads to damage to the gearbox.

Torque adjustment:

There is a “drill” icon on the ring for switching the position of the moment force. This position is intended for drilling and time-consuming tightening of screws.

Quick stop:

When you release your finger from the On/Off switch button, the product automatically and momentarily stops.

Charging the battery.

To charge the battery you need:

· Disconnect the battery from the drill by pressing the two side buttons (left and right) on the battery and, pulling it down, remove it from the body of the cordless drill/driver.

· Connect the charger to a 230V power supply, the red indicator will light up.

· Observing the polarity of plus with plus, minus with minus, install the battery in the charger.

· When charging is complete, the green indicator light will turn on.

Important:

· Battery charging time 1 hour

Use only branded chargers to charge the battery. !. Do not use a charger designed for one model to charge another model.

· The rechargeable battery is designed for 500 charge/discharge cycles.

· After a full charge, the battery lasts for 1 hour without load.

· During the first few charges, the battery capacity is filled to 80%. With subsequent charges, the capacity increases to a maximum.

· The capacity of the rechargeable battery decreases as the work progresses.

· If you have not used the product for more than 30 days, you must first completely discharge the battery and only then proceed to charge it.

· If you do not use the product for a long period of time, the battery capacity will decrease, it will increase after several charges.

Rules for the care and storage of equipment.

In the process of storing, adjusting or replacing nozzles, it is necessary to disconnect the battery from the product, the switch button "On / Off." should be in the off position. This reduces the chance of accidental activation.

During storage, keep the battery away from metal objects such as paper clips, coins, keys, nails, screws, and other small metal objects that may cause contact. internal parts battery, causing sparks and possible fire.

Check the product for jamming of rotating parts, breakage and other situations that adversely affect the operation of the cordless drill/driver.

During operation, hold only the insulated parts of the cordless drill/driver with your hands.

Be sure to hold the product with both hands!

In case of jamming, immediately turn off the product, change the direction of rotation, press the "On / Off" button. and slowly pull the product towards you.

It is strictly forbidden to touch the rotating cartridge or nozzles with your hands.

During the installation of the drill, make sure that the shank is correctly positioned on the jaws of the drill chuck.

Do not install broken or worn attachments.

It is forbidden to move a working cordless drill/driver along the body.

Attention! To avoid damage to the battery after purchase, you must fully charge the battery for 5 hours!

Rechargeable battery/charger.

· To avoid damage to the battery, we recommend that you use only chargers under the trademark https://pandia.ru/text/78/486/images/image009_1.png" alt="(!LANG:Adobe Systems" width="58 height=16" height="16">. Обслуживание, выполненное неквалифицированным персоналом, может стать причиной поломки инструмента и травм.!}

Life time.

Subject to the requirements specified in this manual and in the warranty card, the service life of the product is 3 years

Guarantee obligation.

Electric tools are covered by a warranty, according to the period specified in the warranty card.

You can read the rules warranty service in the warranty card attached to the instruction manual.

Powered by a built-in battery, it has significant advantages over wired models - autonomy, mobility and ease of manipulating the tool with hard-to-reach fasteners. How to choose the right one, which one is better to use at home, and which one is more suitable for work in production? To do this, you need to choose the necessary model of the tool, based on its purpose and main technical indicators:

  • battery type;
  • maximum torque value;
  • maximum spindle speed;
  • type of clamping head (chuck);
  • availability of additional functions and devices.

Types of batteries, their features

As with all power tools, the battery is the weakest part of the screwdriver. They can be of the following types:

  1. NiCd - nickel-cadmium;
  2. NiMh - nickel-metal hydride;
  3. Li-ion - lithium-ion;
  4. LIP - lithium-ion polymer.

NiCd batteries were developed in the middle of the last century, but are still used today due to two main advantages. Firstly, they have a large possible number of charge-discharge cycles (up to 1000), which allows them to operate for 20 years, and secondly, this is the ability to withstand large temperature differences without degrading their technical characteristics.

Disadvantages limiting their use on a wider scale include:

  • relatively large size and weight;
  • loss of capacity due to incomplete discharge, i.e. requires the battery to be completely discharged before the next charge;
  • requires special disposal as a product containing an environmentally harmful substance.

NiMh batteries have been produced since the 70s of the last century, as a modification of nickel-cadmium batteries, and in comparison with them, they have become much lighter, environmentally friendly, and also less critical to the requirement to use batteries until they are completely discharged. However, frequent recharging also negatively affects their capacity. Unfortunately, all of these advances come at the cost of reduced battery life and the inability to use batteries at sub-zero temperatures.

Li-ion batteries have been produced on a mass scale by Sony since the 90s of the last century and have become widespread due to their low weight, high capacity and non-critical requirements for recharging the battery to full discharge. These advantages of Li-ion batteries most conveniently meet the requirements of developers of professional autonomous batteries, including screwdrivers, which are used by craftsmen continuously throughout the entire work shift.

Video: Cordless screwdrivers - how to choose.

Specifications of cordless screwdriver

The main technical parameters of batteries are capacity and voltage. The larger the battery capacity, measured in "ampere-hours" (Ah), the more electric charge it can accumulate, respectively, the longer the tool will work offline. The battery capacity of 1Ah, declared in the product data sheet, means that it can deliver a current of 1A for 1 hour.

The higher the battery voltage, measured in "volts" (V), the greater the power and performance of the tool. Screwdrivers can use batteries with a voltage of 3-36V. High voltage batteries are used in high power applications for drilling large diameter holes or driving screws into hard materials. Low-power tools with 3-6V batteries are used for drilling thin holes and driving thin screws in not very hard materials.

The most popular household tools among consumers are those equipped with built-in batteries with a nominal voltage of 12V, as they have the most optimal ratio of cost, operating time without recharging and power. When operating the device, it must be borne in mind that optimal performance and tool life are ensured only when using the type of battery specified in its passport. If you install a battery with a lower voltage, the performance of the screwdriver will be insufficient, and if you use a battery with an increased voltage, premature wear of the engine and a quick breakdown of the tool occur.

Cordless screwdriver device

1. Maximum torque

Torque, measured as newton per meter (N/m), determines the force developed by the tool when driving a screw or turning a drill, and depends on the engine power and spindle speed. It is enough for models used for domestic purposes to have a maximum torque of 12-20N / m, while professional screwdrivers are capable of developing up to 100N / m.

2. Maximum rotation speed

If drilling holes requires a high rotation speed of the drill in the range of 900-1200 rpm, then to tighten the fasteners, it is necessary to have a low bit rotation speed of 400-550 rpm. This problem is solved by using a switch or a regulator of the speed of rotation of the motor rotor. The greater the maximum rotation speed developed by the rotor of the electric motor, the more productive the tool. Adjusting the engine speed is usually achieved by changing the amount of voltage supplied to its winding through a potentiometer controlled by a button-regulator for turning on the motor.

3. Chuck type

The screwdriver can be equipped with both a key and a keyless chuck. The second type, unlike the first, does not require the use of a key to secure the bit and thus saves the time required to replace it. In addition, there is no need to constantly carry the key with you, which is often lost in the most right moment. However, the keyless chuck is inferior in the reliability and strength of the clamp and allows the drill to be rotated with high material resistance.

Video: How to choose a screwdriver for home

Additional features and accessories

They are aimed at creating comfort and speeding up the work performed with the tool and include:

  1. reversal of the direction of rotation of the spindle allows not only to tighten, but also to unscrew the screws, facilitates the removal of jammed drills from the hole;
  2. adjustment of the torque allows you to increase the accuracy of drilling and prevents constriction and disruption of the slots on the screws;
  3. the spindle lock makes it possible to replace the nozzles in the chuck with one hand;
  4. illumination of the drilling site is convenient for work in unlit and dimly lit places;
  5. the presence of a case for storing the tool and components in the best way ensures its safety and readiness for work;
  6. a double set of replaceable batteries allows you to work with the tool without interruption for recharging;
  7. not the last role is played by the ergonomics of the device. A heavy tool should be conveniently and securely located in the hand so as not to tire it in work, be well balanced, without causing additional effort on the part of the person to hold it.

Choosing a cordless screwdriver, which is better by brand

Many different domestic and foreign companies are engaged in the production of power tools, the products of which differ markedly in terms of kit, reliability and cost. Such brands as Makita, Bosch and Hitachi deserve great popularity among them, due to the high quality of products and their durability, despite the high cost. The products of Black & Decker and Interskol are also in good demand. Choose a cordless screwdriver, which is better according to the brand of the manufacturer, based on its operating conditions - the tool is intended for industrial or domestic purposes.

Video: Which screwdriver to choose: Makita, Black&Decker, DeWalt, Arsenal. Choosing a screwdriver

Features of professional models:

1. Bosch GSR 12-2 has:

  • powerful electric motor that allows you to work continuously for an hour;
  • an original charger that provides charging in a gentle mode and extends the life of the batteries;
  • accelerated braking and automatic locking of the keyless chuck, providing convenience and speed in changing the nozzle.

The model performs excellently during assembly and repair work in the process of drilling holes of small diameter and tightening self-tapping screws or medium-sized screws. The manufacturer allows users registered on the company's website to receive a 3-year warranty service for a branded tool.

2. Hitachi DS 12 DVF3 has:

  • gearbox with two-speed transmission, allowing you to get a high speed of rotation and great importance torque;
  • a powerful flashlight that provides comfortable working conditions at night and in dark rooms;
  • safety clutch that provides 22 options for attaching equipment and allows you to produce customization the torsion force applied to a particular type of fastener and material;
  • electronic speed control circuit and reversal of the direction of rotation, facilitating handling various types fasteners;
  • convenient ergonomics of the tool, which determines the popularity of the model among furniture assemblers and repairmen.

3. The compact model Makita 6281DWPE has:

  1. Powerful electric motor and gearbox with 2-speed transmission for high speed drilling of large holes and high torque.
  2. reverse rotation and electronic adjustment its speed, which allows you to quickly deal with fasteners;
  3. single-sleeve chuck with automatic locking, which ensures quick change of working nozzles while holding the tool in your hands.

4. Drill driver DeWalt DC 727 KA has:

  • high power electric motor with aluminum air cooling radiator;
  • two-speed gearbox made of solid metal, protected by a durable shockproof housing, ensuring the serviceability of the tool after falling from high construction scaffolds;
  • a safety clutch that stops the chuck at high material resistance;
  • smooth speed control, allowing the tool to work with small fasteners.

Affordable price favorably distinguishes the model for use in installation and repair work.

Popular household models of screwdrivers:

1. Skil 2006 AB is an inexpensive model for home use. She has:

  1. reverse function;
  2. 12 torque settings;
  3. simple execution and maintenance;
  4. long service life;
  5. comfortable handle and light weight, does not tire the hand.

2. "Interskol DA-18 ER" is great for jobs such as redecorating an apartment or assembling furniture after a move. The model is a drill driver with a very capacious battery that allows you to work for a long time without charging. Ease of use is ensured by good tool balancing.

Such a hand-held power tool as a screwdriver has become very popular and sold in the tool market today. All because he is an excellent assistant and in household, and for the professional builder. After all, you must admit that with the help of an electric screwdriver it is much easier, better and faster to perform a number of repair and household types of work. For example, if you need to hang a picture or a shelf on the wall, then using an ordinary screwdriver you will have to spend a lot of time and effort on such a seemingly simple job. But using an electric screwdriver you can do it in a matter of minutes.

Due to the fact that power is constantly supplied from the network through the wire, you can work with a corded screwdriver for exactly as long as you need. No need to worry about charging the battery or stop work if it is dead. A corded screwdriver, unlike a cordless one, has less weight, due to the absence of a battery. But you see, an important factor when working with a power tool is its weight. Hands get tired quickly from a heavy tool, which makes it impossible to work with it for a long period of time. Another significant plus is that when you buy a corded screwdriver, you only pay for specifications tool. In the case of a battery-powered device, the cost of the battery is included in its price. And this means that its price may not correspond to the characteristics for which you could purchase a cheaper network counterpart. A corded screwdriver also wins in terms of costs, because in the event of a breakdown or wear of the battery cell, it will have to be purchased again.

But the main advantage of a cordless screwdriver is its mobility. After all, independence from the outlet allows you to perform the workflow anywhere, whether it is a high-rise building or a basement. The power cord does not interfere with work and there is no need for extension cords and their constant movement to the work area.

There is another important factor in the cordless screwdriver, which is not in the network device. This is the type of battery used and its specifications.

The technical characteristics of the battery include its operating voltage, charge capacity and time for a full charge. Voltage affects the power of the screwdriver itself, the higher the voltage, the greater the power of the screwdriver, and therefore the greater its torque. The charge capacity affects the duration of the screwdriver from one full charge, that is, this is the amount of energy that the battery is able to contain in itself. The full charge time indicates the amount of time it takes for the battery to fully recharge its charge.

There are three types used in screwdrivers: nickel-cadmium (Ni-Cd), nickel-metal hydride (Ni-MH) and lithium-ion (Li-Ion). All of them have their dances and disadvantages, therefore, in order to arrange them, it is better to consider them based on the following parameters:

- Number of charges. Nickel-cadmium can withstand up to 1000 charges, nickel-metal hydride - up to 500, and lithium-ion can be charged almost an infinite number of times.

- Memory effect. This setting reduces the capacity of the battery if it was not fully charged or charged when it was not fully discharged. Lithium-ion batteries do not have this effect, which is not the case with the other two types of screwdriver batteries.

- Resistance to low temperatures. Nickel-cadmium batteries can be used without problems when working outdoors in sub-zero temperatures. The remaining two types of batteries lose their maximum charge capacity at low temperatures, and the temperature also affects their charging speed.

- Security. In terms of environmental performance, the lithium-ion battery wins.

The online store offers a wide selection of models of electric screwdrivers of any type. in our online store you can at a pleasant affordable price simply by filling out an application on the website or by calling the number: +7 495 268-06-66.

If you doubt the choice or need help, our experienced consultants are always ready to help you. They will answer your questions and help you choose the right model.

You can contact them directly on our website by clicking the button in the lower right corner, you can fill in or call by phone (+7 495 268-06-66) and they will be happy to provide you with all the necessary information and answer all your questions.

When purchasing goods in Moscow and the Moscow region, you can use the door-to-door delivery service in the city and the nearest suburbs, and you also have the opportunity to pick up the goods yourself from our warehouse or pick-up point. In cases of purchase of goods from other regions of Russia, delivery is provided by any transport company as agreed.

Please check the requirements before purchasing. portable power tool. They are regulated by state standards and technical specifications for electrical safety.

You can get acquainted with them, for example, on the Energokontakt website.

First of all, we list what applies to portable power tools. These are electric soldering irons, electric drills, screwdrivers, wrenches, furrow cutters, electric hammers, grinders, portable electric heaters for technological needs, step-down transformers for powering power tools, local lighting fixtures, portable electrical panels and other current collectors.

Classes

Portable power tools are divided into classes.

The zero class includes a power tool with working insulation, without grounding elements, not belonging to the second and third classes.

The first class power tool has a working insulation and an element for grounding. Its wire leading to the power source must be equipped with a grounding conductor and a plug with a grounding contact.

Class 2 power tools have double or reinforced insulation, but no grounding elements.

The power tool of the third class is designed to operate at extra low voltage (not more than 42 volts) and does not have any electrical circuits operating at a different voltage.

Voltage for tools of the first and second classes - no more than 220 volts at DC, 380 volts - with alternating.

room


The voltage of the tool must not exceed 380/220 volts when working in rooms without increased danger and 36 volts in other rooms or outside them.

In rooms with increased danger there is one of the following factors: high dampness (relative humidity more than 75%); temperature above 35ºС; conductive floors; conductive dust; the possibility of simultaneous contact with the metal structures of the building that have a connection to the ground, or with technological equipment- on the one hand, and with a metal case of electrical equipment - on the other.

Particularly dangerous are rooms with a relative humidity of about 100%; with a chemically active or organic medium; containing two or more risk factors.

The main thing general requirement for individual users - to work from the mains only if the power tool has a non-removable flexible cord with a plug. The cord must be protected from damage and contact with damp, hot and oily surfaces.

When the plug is turned on, its design must ensure the early closing of the grounding contact, and when turned off, the subsequent opening. It also needs to be protected from moisture. The power tool must be quickly connected to the network and disconnected from it (but not spontaneously).

Faults

And super important! If any, even a minor malfunction is detected, work must be stopped immediately!

Typical malfunctions of a portable power tool include: damage to the plug or cord; fuzzy operation of the switch; leakage of lubricant from the gearbox; sparking of the collector brushes with the appearance of a circular fire on the surface; the appearance of smoke, the smell of burnt insulation, hanging noise, knocking or vibration.

To ensure safe operation, it is very important that the body of the power tool is grounded.

Man


Power tools may only be operated by persons specially trained in safe handling. In the event of a malfunction, you cannot repair the tool or its cord and plug yourself - such repairs are usually not of high quality.

When working with power tools, depending on their type, you need to use tools personal protection, which include a cotton suit or dressing gown, dielectric gloves, galoshes, rubber and rugs, etc. In especially dangerous rooms, the use of personal protective equipment is mandatory!

Before starting work, it is necessary to carefully inspect the power tool for proper grounding and insulation of wires, the absence of bare live parts and defects. Defective power tools must not be used!

At the end of work, do not forget to unplug the power tool from the mains.

Many of their readers still remember those days when, to work with fasteners or threaded connections, it was necessary to use only screwdrivers and ordinary wrenches. It is clear that it is not even necessary to talk about the high productivity of such work. Very often, in order to "drive" the screw into place, it was impossible to do without preliminary, since the efforts of the hand in this case, not enough overcoming the resistance of solid wood, not to mention the situation when it was necessary to "pierce" even the thinnest metal sheet. A few hours of such work - and the inevitable calluses on the hands, and the work progressed barely.

The situation has changed radically with the advent of screwdrivers. At first, they were referred to as a kind of instrumental "exotic", causing genuine envy. But very soon these useful tools appeared in free sale, "migrated" to the category of public, and today they are included in the mandatory "arsenal" of the vast majority of owners of houses or apartments. Those who are just now thinking about acquiring such an invaluable assistant should first understand the question of how to choose a screwdriver, that is, what to pay special attention to when evaluating the models presented in a wide range.

The main types of screwdrivers

Under the general name "screwdriver", consumers often mean several types of such a tool at once, which, despite the general similarity of functions, still have differences. So, there are three main types:

  • Electric screwdrivers.
  • Electric wrenches.
  • The most versatile drill drivers. Some models can also be equipped with a shock function.

The most popular tools are those that work autonomously, from rechargeable batteries. However, it is quite possible to purchase a screwdriver that runs on a conventional 220 V / 50 Hz network. Tools with a cord for connecting to an outlet are commonly called “network”.

It is necessary to get to know the main types better - it will be easier to make a choice, realistically representing the intended nature of the work, their intensity and the load on the tool.

Electric screwdrivers.

Despite the fact that in terms of their main performance indicators and overall functionality, cordless screwdrivers are to some extent inferior to standard ones drill drivers, they have their own specific advantages, which make these instruments widely popular among both professional craftsmen and amateurs. These invaluable "advantages" include a small mass, compact layout of the device, high ergonomics. This allows you to use cordless screwdrivers in conditions where the use of a larger tool is either more inconvenient or even simply impossible.


Such a tool becomes indispensable for production lines for the assembly of small household equipment, computer and office equipment, it is widely used by craftsmen in the production process or final assembly. Due to their compactness, ergonomics and low weight, these screwdrivers do not cause rapid hand fatigue, and therefore are very convenient for working at heights, including, for example, when installing false ceilings.

Cordless screwdrivers are different in their layout. Many models have a cylindrical body, which, however, is equipped with a swivel that allows you to fold if necessary, to concentrate the pressing force of the hand.


Other screwdrivers have the usual "pistol" shape, but always very compact, comfortable in the palm of your hand.


Cordless screwdriver in "pistol" design

In addition, very easy-to-use models are available, in which the swivel is provided for the working head with a rotating chuck. This opens up the possibility of tightening fasteners or dismantling in the most inconvenient places where it is not possible to start a conventional tool.


The compactness of such power tools is achieved through the use of small batteries, with a voltage usually in the range of 3 to 9 V. Screwdrivers do not have high rotation speeds - usually from 150 to 250 rpm. For their direct purpose, this is quite enough, as well as a tightening torque of about 10 N × m. For the vast majority of fasteners, especially in domestic conditions, such indicators are more than enough. However, there are more advanced models equipped with a two-speed switch, and allowing you to perform drilling work with plastic and wood - their rotational speed can reach up to 600 rpm.

Almost all cordless screwdrivers are equipped with a ¼" hex bit adapter. Usually bits under Various types fasteners, as well as small-diameter drills with the same hexagonal shank, are included with the screwdriver itself.


Unlike larger tools, electric screwdrivers are often equipped with a non-removable battery located in the product body. For charging, a special power adapter is used, which is connected to a power outlet.


What is the result? If the owner has a good drill in his tool kit, and he only needs to mechanize the process of working with fasteners, then a cordless screwdriver can be a very useful assistant. In the convenience of such operation, it surpasses a screwdriver, but is significantly inferior to it in functionality.

Electric wrenches

Another the type of tool that very similar to a screwdriver, and even in certain circumstances it can be used as it, but still has features that are directly related to its intended purpose.


If the master, according to the specifics of his work, very often has to resort to the installation or dismantling of threaded connections of medium or large diameter, then limit himself to using wrenches This means a drastic reduction in productivity. A classic example is an assembly production put on stream or, which is closer to private practice, car repair or tire shops. In addition, in particular, when repairing machines, it is very often necessary to deal with old, “soured” nodes, which are very difficult to unscrew manually, even after processing with a special compound.

The way out is to use an impact wrench. Its design is such that, in addition to the usual rotational movement, impulse actions with a certain frequency are also transmitted to the working part of the spindle by a special mechanism. In a word, these are a kind of “micro-shocks”, capable of moving and unscrewing even very rusted nuts or bolts, without violating the integrity of the faces of their heads.

Most nutrunners have the usual "pistol" design, but can be additionally equipped with a removable side handle to concentrate the clamping force when breaking the connection. Nevertheless, there are also "straight" devices, with a working head located perpendicularly - for performing operations in hard-to-reach places.


Of course, such operations require special drive power - usually it ranges from 350 W for the smallest tools and even up to 1300 W for professional-grade devices. The rotation speed does not play a decisive role here, and it is usually small. But due to this, a high torque is achieved, which even for “weak” impact wrenches is about 200 ÷ 300 N × m (compare, for example, with the already considered cordless screwdriver!), And in professional-class models, with an electric drive power of over 1000 W, this figure can even reach 1000 N × m.

In appearance, wrenches are very similar to screwdrivers, but they are distinguished by a feature - the absence of a maximum torque adjustment ring (“ratchet”). The working end of the spindle is also different - most often there is an adapter-square for socket heads. The dimensions of the square for models of different power can vary - ½ (most often for household models), ¾ or even 1 inch (for a professional powerful tool), which means that sets of heads should be purchased accordingly. Although, there are special adapters for this case.


Some manufacturers immediately provide for increased adapter versatility. So, in the center of the square spindle there may be a socket for inserting standard ¼ inch hexagons - bit shanks or drills.

More versatile model - the adapter is designed for both sockets and hex bits

But even this does not add much versatility to the wrench. Its specific electromechanical characteristics are nevertheless "sharpened" for specific operations. High torque, and even with a pulsed mode, can be completely unnecessary and even harmful when working with materials that do not require excessive effort. And a low rotation speed may not be enough to perform drilling work.

In a word, impact wrench, if the specifics of the work of the mater involves its frequent use, it will be a good addition to the screwdriver, but it is unlikely that it will be able to completely replace it in the householder's arsenal.


By the way, many well-known manufacturers produce tool kits,which are included and drill driver, and an impact wrench that run on a single set of batteries. Here it's a really versatile set. True, its cost is quite high, and such a purchase should be really justified.

Drills

This is the most common and most frequently purchased variety of such tools, which has increased versatility.

The vast majority of these screwdrivers are made according to the basic "pistol" scheme.


"Classic" drill-driver layout

1 - housing made of impact-resistant plastic (some professional-grade models have an all-metal housing). Inside there is an electric drive with controls, a well-thought-out air cooling system.

2 - pistol grip. In high-quality models, it has rubberized pads that prevent the tool from slipping in the worker's hand, making the tool as comfortable as possible.

3 - battery with a locking mechanism in the handle. In most models, it looks similar to what is shown in the figure. However, some modern screwdrivers are equipped with powerful compact type batteries, which are completely hidden inside the handle, making working with the tool even more comfortable.

4 - key (trigger) start. Moving the trigger at the same time smoothly adjusts the speed of rotation of the screwdriver's spindle. Usually the trigger is also covered with a pad of rubber or soft plastic.

5 - switch for the direction of rotation of the spindle (reverse). It is designed so that the switching process is as simple as possible - just the effort of a finger.

6 - gear switch, which allows you to change the operating modes of the tool - low speed with high tightening force, or, conversely, high-speed rotation, necessary for drilling work. This feature is not available on all models.

7 - cartridge for clamping a working tool - a bit holder or drills. The design of the cartridge may be different. Some models are not equipped with a chuck - they have a ¼ inch hex socket for standard bit shanks or special drills. The types of cartridges will be discussed below.

8 - clamping jaws of the cartridge.

9 - an indispensable element of any screwdriver - a mechanism for limiting the torque transmitted to the chuck. It is usually made according to the “ratchet” principle - when the set tightening torque is exceeded, the clutch slips with a characteristic sound. The number of torque setting positions can be different - from 5 ÷ 6 in inexpensive models to two dozen or more in professional tools. A drilling mode is necessarily provided - when the rotation is transmitted from the gearbox to the chuck without torque restrictions. This mode is indicated by the corresponding icon.

10 – modern models screwdriver in more often they are equipped with an LED workspace illumination system. Location LEDs may be different.

Thus, this type of screwdriver is the most versatile, which determines its widest popularity among professionals and home craftsmen.

What to look for when choosing screwdriver

Deciding to purchase a particular model drill driver, the future owner of the instrument must clearly understand, for what goals it is necessary what kind operations are planned to be performed by them and with which exploit intensity. It is these preliminary "bastings" that will become the basic points when evaluating the characteristics of the devices offered for sale.

Type of batteries and their characteristics

It is advisable to start the consideration with the "energy" of the screwdriver. No matter how wonderful the tool itself is, its performance directly depends on batteries, the cost of which, by the way, is always more than half the price of the entire kit. Surely, many have had to deal with a situation where the screwdriver itself is still quite functional, but the way out of troy power supply creates a lot of problems. It is far from always possible to find a suitable replacement - many manufacturers do not sell batteries separately, apparently trying to encourage users to purchase a new set.

The main characteristics of batteries for screwdrivers are voltage and capacity.

  • From voltage directly the power of the electric drive and, accordingly, the maximum torque, which determines functionality tool. So, on sale most often there are screwdrivers with batteries with a voltage of 9.6; 12; 14.4 or 18 V. This, however, is not the limit - powerful professional tools have batteries of 20 or even more volts (up to 36). 9 volts still looks not enough even for household tool. The optimal solution for a screwdriver purchased for home use, it will most likely become the "golden mean" - with 14.4 V batteries.

By the way, you can find almost the same ones from the same manufacturer, differing only in the supply voltage and, as a result, in power indicators. But even in this case, it should be understood that the batteries are not interchangeable - the electric drive is designed for a specific voltage, and exceeding it will lead to its failure.


  • Battery capacity is measured in ampere-hours (Ah or Ah - you can meet both one and the other designation). Usually this indicator is indicated on the marking made on the battery case, next to the voltage.

In fact, battery capacity is a value that shows how long the tool can operate on one fully charged battery without recharging. Naturally, the larger this value, the less often it will be necessary to interrupt work to replace the power supply and put the elements on recharging.

Usually for household grade screwdrivers used occasionally, a capacity indicator of 1.2 ÷ 2 Ah is sufficient. For intensive use, this indicator will not be enough - you should look for kits with a battery capacity of 2 ÷ 3 Ah.

The performance of batteries is directly dependent on their types. This issue requires closer consideration.

  • Nickel-cadmium batteries (Ni-Cd )

Due to the low price, such batteries remain the leaders in the mass use in middle-class power tools, despite the fact that they are being replaced by more advanced batteries.


Reliable Workhorses: Nickel Cadmium Batteries

Advantages nickel-cadmium batteries are as follows:

  • The already mentioned low manufacturing cost.
  • High resistance to negative operating and storage temperatures.
  • The only ones that exist, they are not afraid of an absolutely complete discharge. Nickel Cadmium it is quite possible to store the battery in a discharged form - and after that it will fully recover after proper charging.

They have a lot of disadvantages:

  • Inability to achieve high specific capacitance. An indicator of 2 Ah, at best, will already be the limit.
  • A rather short overall "life" - even high-quality Ni-Cd-batteries rarely withstand more than 1000 charge-discharge cycles.
  • Such batteries are prone to self-discharge - with infrequent work, you may encounter the fact that a seemingly fully charged battery “sat down” from storage and does not cope with its task.
  • The main "ailment" of such batteries is the "memory effect". It is unacceptable to charge the battery if it has not fully exhausted its resource. The fact is that when receiving a charge not from “0”, the remaining level of charge is still perceived by the device as the minimum value. Thus, the capacity of a fully charged battery spontaneously decreases by the value of the previously undeveloped potential. It is required in one way or another to completely discharge the battery (for example, by connecting a light bulb or a flashlight that is often included with a screwdriver), and only then insert it into the charger. This can be extremely inconvenient, especially in situations where it seems that the power of the tool is already beginning to be lacking, and “hands are reaching out themselves” to put the battery on charge.
  • Improper disposal of used nickel-cadmium batteries can harm the environment.

However , nickel-cadmium Batteries are considered true "workhorses", and are most often installed on household-class models. In such operating conditions, their qualities will be quite enough.

  • Nickel metal hydride batteries (Ni-MN )

Nickel metal hydride batteries are an attempt by battery developers to get rid of the main disadvantages of Ni-Cd. But to say with full responsibility that this is a good step is still impossible.


Advantages of such batteries:

  • Their production and disposal are environmentally friendly.
  • High charge capacity, which can quite reach 3Ah. And this, coupled with a more compact size of the battery itself. Accordingly, above power density power source.
  • The negative effect of memory is no longer so significant, oneako, it was not possible to completely get rid of it.

Disadvantages of such batteries:

  • Their price is significantly higher than nickel-cadmium.
  • Low duration of "active life" - the number of recharge cycles rarely exceeds 500.
  • Such batteries are characterized by a high level of self-discharge - the drop can reach up to 10% on the first day of storage after a full charge.
  • The performance of batteries is sharply reduced when working in conditions of negative temperatures.
  • These batteries must not be stored in a fully discharged state.

In short, the high price of such batteries looks unjustified. It is better to purchase or a cheaper running option - nickel-cadmium, or don’t be stingy anymore and choose a screwdriver with lithium-ion batteries.

By the way, nickel-metal hydride batteries have not received much development, and tool kits with them are quite rare on sale - due to the low demand for them.

  • Li-ion batteries (Li—ion)

These are the most modern and, accordingly, perfect batteries for autonomous power tools.


The most modern, powerful and capacious - lithium-ion batteries

The advantages of such batteries are as follows:

  • The memory effect is practically absent, that is, you can recharge the battery at any degree of its discharge.
  • Among all other batteries, lithium-ion batteries have the highest charge capacity and power density.
  • Charging speed is the fastest.
  • But the effect of self-discharge is extremely weak. It is considered normal that for a year of storage under normal conditions, a high-quality lithium battery can lose no more than 20% of its charge.
  • The term of active life, the allowable number of charging cycles of such a battery is three times, or even more, exceeds similar indicators nickel-cadmium.

There are also several disadvantages:

  • High cost is a rather conditional disadvantage, since high performance justifies it.
  • The operating temperature range of lithium-ion batteries is quite wide, and they can be used in frosty conditions (although they lose some of their characteristics). But they will not perceive charging at negative temperatures.
  • A complete discharge of the battery is categorically unacceptable - it will not charge from scratch. Manufacturers take into account this drawback, and equip their products with special built-in electronic circuits that will not allow a full discharge. In addition, very widespread the trend is to equip batteries with charge level indicators - this makes it easier to visually monitor them.

When choosing the right model, it is best to purchase a kit that includes two batteries. This way you can ensure the continuity of large-scale work - while one battery is standing on a screwdriver, the second one is being charged. True, when using Ni-Cd batteries, you should always keep in mind the need to fully discharge them so as not to cause a “memory effect”.

Very often, in the technical documentation of the product, the manufacturer indicates the average duration of charging batteries - the shorter it is, the more convenient the tool will be to use.

Well, for those users who do not want to mess with batteries, and who are not afraid of the power cord stretching from the tool, it remains to be advised to purchase a network model.


The performance of the tool does not suffer from this, but the amenities, of course, somewhat smaller. When choosing, it remains to pay attention only to the length of the cord - so that it is enough for the specific conditions of the intended operation.

Electromechanical qualities of a screwdriver

  • A few words about the drive. In most models of the low price range, the already old and proven scheme with a brush collector is used. Such engines are quite reliable, but still not without flaws. And the main one is significant friction forces at the place where the brushes fit to the collector lamellas. Naturally, this is accompanied by a significant release of thermal energy, and the drive heats up quite quickly. In addition, sparking of the brushes on the collector is not excluded, especially if you have to work in conditions high humidity air.

All these shortcomings are devoid of a brushless motor with electronic control. The absence of an additional friction area leads to a sharp increase in tool performance. So. tests carried out on similar models with batteries of exactly the same characteristics showed that a screwdriver with a brushless motor did almost three times more work than with a commutator one.


Brushless and frameless motor "DeWalt"

Some manufacturers (for example, DeWalt) decided to get rid of the engine housing - all its components are located directly in the housing of the screwdriver itself. And this is not a trifle at all - it turned out to be a significant gain in total mass tool that makes it much easier to work with.

So, if there is a choice between a conventional and brushless drive, it would be wiser to make a decision in favor of the latter. True, this is reflected in the price of the instrument.

  • When choosing, be sure to clarify what materials the screwdriver gearbox is made of. This mechanical assembly is subjected to the greatest loads, and its quality will determine the functionality and overall life of the entire tool.

It cannot be said that plastic gears are of poor quality, but still their resource is less than that of solid metal ones. And the deformation of even one tooth on any of the gears entails jamming or complete destruction of the entire kinematic scheme of the gearbox. So it is better to make a choice in favor of metal ones.

  • Characteristics of the speed of rotation of the working spindle - they are always indicated in the product passport. It probably does not make sense to chase after too high indicators - to perform installation and dismantling operations with fasteners an excess of 500 rpm is enough, and for drilling wood or metal - about 1200 ÷ 1500 rpm. Higher speeds are inherent in a professional tool for performing specific operations, and are unlikely to be in demand at the household level.

Rotation speed adjustment from zero to the maximum is made by changing the force of pressing the trigger (key). For a more comfortable performance of basic operations, you should choose a screwdriver, which has the ability to switch the gearbox to high and low speeds. Usually the switch is located on top of the housing.


  • Maximum torque is an important characteristic that envy the functionality of a screwdriver.

So, to work only with small fasteners, 10 Nm is enough, but it will be more like an electric screwdriver. In order for the screwdriver to perform simple drilling operations, it is better to select a model with a maximum force of at least 25 Nm. Respectively. in the case when more is expected from the tool - for example, drilling wood with large-diameter crowns or metal, choose screws rt with a torque of 36 Nm or more.

For many consumers, torque values ​​expressed in newton meters. They can say little. Therefore, the technical documentation of screwdrivers usually additionally indicates the maximum diameters of drills, separately - for processing metal and wood. This will make it much easier to make a choice.

  • Torque adjustment (tightening torque) - is on almost all screwdrivers. As a rule, this is a rotating ring with a printed scale - from the minimum value to the maximum value used for drilling.

If the set force is exceeded, the ratchet or slip clutch is activated, and the excessive torque is not transmitted to the fastener.


The numbers on the scale show only the serial number of a particular switch position as the tightening torque increases, but are in no way connected (as some inexperienced users mistakenly believe) with the diameters of the fasteners. The drill symbol indicates the maximum torque required to drill.

  • There is a rotation direction switch on all, probably, models - without it, screws rt will simply cease to be so. Usually located above the start key (trigger). In some miniature screwdrivers (like a cordless screwdriver) two different keys can be provided - for forward and reverse rotation of the spindle.

Cartridge type

Most modern screwdrivers are equipped with quick-release chucks, making it easy to change bits or drills.

Keyless chucks can be single or double sleeve.


In a two-sleeve chuck, when installing and removing a working tool, the lower sleeve is held by hand, and the upper sleeve is tightened or, conversely, released. It is even easier to work with a single sleeve - the whole operation is performed with the movement of one hand. True, at the same time, the screwdriver itself must be equipped with a spindle lock function. Such blocking can be automatic, triggered when the rotation stops, or forced (there is a special button).

By the way, when choosing a screwdriver, be sure to clarify whether the tool has the option of forced spindle braking - when the trigger is released, the rotation should immediately stop. Almost all modern tools are equipped with such a function, but if you still come across an outdated model, the cartridge of which continues to rotate by inertia after turning off the power, you should not purchase it, as it will cause a lot of inconvenience in work.

Cam chucks, which require a special key to tighten, are rarely used with screwdrivers. The key tends to disappear forever in the course of work, and the process of replacing the drill requires a lot of time and additional effort. Nevertheless, many craftsmen include such a chuck in their kit, since sometimes for drilling that requires significant effort, the tightening force of the coupling chuck may not be enough.


If the choice is made based on the minimum dimensions of the screwdriver and with its predominant use for screwing fasteners, then you can purchase a model without a cartridge at all - with an adapter for a ¼ inch hexagon.

On the right is a compact screwdriver with a removable chuck with a hex shank for a standard adapter

In this case, if you need to make any small drilling operations, you can use a small chuck with an adapted hex shank.

Additional criteria for choosing a screwdriver

Many models of modern screwdrivers are equipped with additional useful features.

  • In addition to rotational, it can also be provided for impact force on the tool chuck. This allows drilling holes in some building materials. Such screwdrivers have a switch between normal and impact modes. It can be located both on the torque switching ring, and taken out separately.

Many models of hammer drills come with an optional detachable side handle to accentuate forward force when drilling.

By purchasing a similar screw rt, it should still be quite realistic to imagine that he can cope with brick wall or made of some kind of lightweight concrete (gas silicate). If it is required to drill holes in reinforced concrete structures, for example, in the walls or ceiling of a panel house, then it is better to have a hammer drill for such operations.

  • A great help in the work can be the presence of a pulsed mode of operation of the tool - by analogy with impact wrenches. This allows you to cope with soured threaded connections or accurately mark the start of the drill in dense material.

The inclusion of the pulse mode can be on the torque adjustment ring, or it can be performed in the form of a separate button, pressed as needed.

  • An additional convenience when working will be the presence of a built-in backlight. The LED "flashlight" can be located coaxially with the body, under the cartridge. However, as practice shows, this is not always convenient - the cartridge itself can obscure the area of ​​\u200b\u200bwork.

Another location for the flashlight is at the bottom of the pistol grip. The flow of light is directed in this case so that it completely illuminates the working area from below.


The convenience of a particular lighting scheme can be assessed when choosing a tool.

  • The most important selection criterion is the weight, balance of the tool, the convenience of its location in the palm of your hand. If work at height is expected, then more attention should be paid to lightweight compact models. And in t for frequent drilling operations, the weight of the tool even becomes a certain help in the work.

But in any case, when assessing the “acceleration” of a screwdriver in a store, one should evaluate the location of the center of gravity of the tool - moving forward or backward gives a quick fatigue of the hand.


Experienced craftsmen are advised to evaluate the place of transition from the handle to the trigger - it should be with a smooth transition at an obtuse angle. A right-angled or sharp-angled transition will cause the middle finger to quickly fatigue during large-scale work, and may even cause the formation of a corn on it.

  • Be sure to evaluate the equipment of the delivery set.

- The kit includes a charger with a power cord. Modern " chargers"- This is a well-thought-out electronic circuit that will not allow the battery to overheat, and will automatically turn off when the upper charging limit is reached.

As noted above, you should not buy a screwdriver, equipped with only one battery. - it is extremely inconvenient to work.

- The kit may include a flashlight - as additional lighting during work or as a device for the necessary complete discharge nickel-cadmium batteries.

- Often, screwdrivers are equipped with special belts or even holster covers for the convenience of placing the tool on the master's belt when working at height.


— To the included bits and drills m Many professionals are quite skeptical, preferring to purchase the required types separately. However, leading manufacturers equip their kits with equipment of a fairly high level. True, the specification is not always sufficient, and the need for an additional purchase most often arises.


- Professional-grade screwdrivers can be additionally equipped with replaceable gear blocks. Example - model " FESTOOL C15» .


Screwdriver "FESTOOL C15" - a model of increased versatility

In addition to the adapter for hex bits, a keyless chuck can be installed on the tool. In addition, the kit includes a reducer nozzle that allows drilling and tightening fasteners at an angle of 90 °. More it is a replaceable nozzle - this is an eccentric that transmits rotation to the drill or bits with an offset from the axis of the screwdriver. A very handy feature for working in a corner, where the body of a conventional tool does not allow for a perpendicular application of force.

True, the price of such kits is very high.

Brands you can trust

An important selection criterion should always be the manufacturer and availability in a particular region. after-sales service of this brand. For example, dynamically developing European company KRÜGER.

Prices and range of KRÜGER screwdrivers

The German brand KRÜGER offers three models of screwdrivers: 12, 18 and 21 V. KRUGER brand tools are increased in power, equipped with various functions and come with a rich package. The 12V and 18V units work for drilling/tightening, the 21V drill/driver also has an impact mode.

Professional cordless screwdrivers Kruger (https://shurupovert.krugerpro.ru) show excellent technical characteristics. Inside is a lithium-ion battery with large capacity which allows you to use the tool for a long time. The drill-screwdriver provides illumination of the working area, so it can be used at night or in places with poor lighting.

Using the tool, not only drill holes, but also screw or unscrew the fasteners. The Kruger cordless drill/driver comes with a set of 13 bits and 7 drill bits, as well as a charger that charges the screwdriver in just one hour. The presence of the reverse function allows you to quickly get the stuck drill.

This is a compact and lightweight tool that should be in the arsenal of every master. Depending on the modification, the prices for Kruger screwdrivers vary in the range of 4000-8000 rubles.

  • Without any doubt you can buy Makita screwdrivers - this company has always been a leader in the production of power tools.
  • A wide range of models, from inexpensive household to professional tools, is offered by Bosch. Regardless of the class of screwdrivers , they are all of the highest quality and reliability .
  • The AEG tool cannot be called cheap, but it fully justifies the money invested in it.
  • DeWalt brand power tools are always distinguished by the most innovative developments in this area.
  • Screwdrivers "Metabo", as a rule, are saturated with electronics, including regulating and torque value.
  • Hilti brand tools are a high functionality, but still their price looks unreasonably high, despite the tempting manufacturer's warranty.
  • are in great demand and good feedback get affordable Hitachi, Sparky, Skil screwdrivers.
  • Among domestic manufacturers, it is quite possible to put Interskol, Caliber, Zubr in this series. Perhaps, in certain positions they lose to the novelties of the world's leading manufacturers, but in terms of reliability, service availability and price level, they are a very attractive choice.

But to acquire a “pig in a poke”, under an unknown delirium, most often made in China, is, of course, a “lottery”. It is quite possible that such a screwdriver will last a long time, and will fully cope with the tasks assigned to it. However, in the event of a failure, it is not necessary to rely on any technical support or warranty. And with spare parts for self-repair, big problems can arise.

And at the end of the publication - a very voluminous and informative video lecture on choosing the best screwdriver.

Video: the right approach to choosing screwdriver