Cordless screwdriver. Cordless drill/driver Is a screwdriver a portable power tool?

Which is designed for drilling holes in wood, metals, plastics and other materials.

The use of various attachments instead of a drill allows such a drill to perform some additional operations, including screwing in and out of screws.

Screwdriver- this is a type of power tool in which, on the contrary, the main function is to screw in and unscrew screws and screws, and drilling is in second place.

In other words, a screwdriver is a special drill designed for driving in and out screws, as the name of the tool directly implies.

More precisely, this tool is called drill screwdriver, but for simplicity of presentation and perception of the text, we will still use the term screwdriver.

In recent years, a screwdriver has become an increasingly popular tool for a mandatory kit for an amateur craftsman and is in maximum demand in the country, at home, and in the garage.

This tool can significantly facilitate labor and increase productivity during various construction, repair and assembly works.

In this article we will only consider cordless screwdriver, since its design and operating principle are similar to an electric screwdriver connected to the mains using a cord.

The only difference is that the cordless tool does not connect to the network, but uses the built-in battery as an energy source.

Working with such a screwdriver is easy and simple; there is no need to have a large set of screwdrivers different sizes for different screws and bolts.

The “acquisition” of calluses on the hands from repeated screwing in of self-tapping screws is completely eliminated.

Device of cordless screwdrivers

The cordless screwdriver “descended” from the electric drill, so their design has similar design components, but there are also differences.

It consists of an electric motor, gearbox, torque control clutch, chuck, controls, battery and housing.

Electric motor- transforms electrical energy battery into a mechanical rotational movement, which must be imparted to the working tool of a screwdriver (bits, drills).

Gearbox- usually planetary type, installed immediately after the engine, serves to reduce the engine speed and increase torque.

Torque control clutch- this is a very useful screwdriver unit that allows you to adjust the required torque (in other words, the screwing force) depending on the material, diameter and length of the screw.

This is necessary in order to accurately stop the screw head in a certain position when tightening the screw (for example, flush with the surface of a wooden block).

The required torque is set using a rotating ring with divisions. When the specified torque is reached, the “ratchet” is activated and screwing in the screw stops.

If insufficient torque is specified, the screw will not be tightened. If excess torque is installed, the screw will be deeply recessed into the “body” of the block.

Cartridge– performs the same function as in a drill, namely, it is used to install working tools (bits, drills and other attachments).

Controls– the control elements of a cordless screwdriver include: a power key (trigger), a torque adjustment ring, a speed switch (in the case of a two-speed version of the screwdriver), a reverse (direction of rotation) switch.

The power key also controls the rotation speed - the deeper it is recessed, the greater the rotation speed.

Battery– cordless screwdrivers can use batteries of the following designs

Nickel-cadmium (short designation Ni-Cd),
- lithium-ion (short designation Li-ion),
- nickel metal hydride (short designation Ni-MH).

We will not consider in detail internal structure each type of battery and the chemical processes occurring in them in different modes. This is quite difficult, and not necessary for the user.

We will limit ourselves to the characteristics and properties of batteries necessary for optimal choice screwdriver models to suit your capabilities and needs.

Each type of battery has its own characteristics, and when purchasing a tool, this information will help you make the best choice.

Ni-Cd batteries They have been used in screwdrivers and other power tools for quite a long time.
- service life – up to 5 years; (*)
- cycles (charge-discharge) – up to 1500;
- minimum temperature use - up to minus 15°C;
- charging time – 3-7 hours;
- presence of “charge memory” - yes;
- weight - significant;
- price - (with equal battery capacity) the lowest of the three options.
It is recommended to charge and discharge batteries of this type completely, otherwise the battery capacity will decrease. It is recommended to store such batteries in a completely discharged state.

Li-ion batteries are the most modern batteries, they began to be used in power tools much later than Ni-Cd and Ni-MH batteries. This type of battery is now the most common in cordless screwdrivers and other tools.
- service life – up to 3 years;(*)
- cycles (charge-discharge) – up to 3000;
- minimum temperature of use - up to minus 10°C;
- charging time – 1 hour;
- presence of “charge memory” - no;
- weight - insignificant;
- price - (with equal battery capacity) the highest of the three options.

Ni-MH batteries– occupy a middle position between the batteries discussed above. Currently, they are found quite rarely in some models of screwdrivers from individual manufacturers.
- cycles (charge-discharge) – up to 1000;(*)
- minimum temperature of use – negative temperatures undesirable;
- the presence of “charge memory” is insignificant;
- weight - significant.

(*) Attention! All specified battery characteristics are average and reference. The exact characteristics of specific batteries are given in the screwdriver instructions or on the battery case.

The charge duration depends on the battery version and the model of the charger included in the kit (regular charge, accelerated charge).

To ensure the service life of batteries specified by the manufacturer, it is necessary to strictly follow the conditions of their storage, use, charge and discharge recommended by the instructions.

Frame- serves to secure all components and screwdriver controls among themselves and protecting the internal components of the tool from external influences(dust, moisture, etc.).

It is often made of high-quality plastic, but some models of screwdrivers use metal housings.

Specifications

Let's consider specifications various models cordless screwdrivers, meaning that the buyer is not a professional builder, but an amateur summer resident or home handyman.

Therefore, we do not consider the characteristics of the devices very much low power(highly specialized, such as an electric screwdriver) and powerful, with a large torque value (professional).

  • Speed ​​(rpm) – 0 – 1500
  • Number of speeds (gears) – 1; 2
  • Maximum torque (N*m) – 15.5 - 32
  • Number of torque stages – 17 + 1 (drilling)
  • Chuck diameter – from 0.8 to 10; from 1.5 to 13
  • Chuck type – quick-release
  • Engine brake – yes; No
  • Reverse – yes
  • Battery voltage (V) – 12 – 18
  • Battery charging time (hour) – 5-7; 3; 1
  • Battery capacity (Ah) – 1.2 – 1.7
  • Battery type – Ni-Cd, Li-ion, Ni-MH
  • Number of batteries – 1; 2

Safety rules for operating a cordless screwdriver

Screwdrivers powered by a built-in battery are not connected to the mains during operation, so there is absolutely no risk of exposure during use. electric current on the human body.

But some other dangers are still possible if this power tool is not used correctly.

We indicate here the basic safety rules that must be observed before starting work and while working with this tool:

  • Before starting work, you must carefully study the rules of use and safety precautions set out in the operating instructions for your screwdriver;
  • While charging the battery, the charger is connected to electrical network voltage 220 V, therefore:
    -check the integrity and absence of damage to the insulation of the charger power cord;
    - use only the charger recommended by your screwdriver instruction manual;
    - perform charging only under recommended conditions and in accordance with specified modes (room, temperature, time);
  • Do not allow moisture or snow to get inside the instrument, this will prevent a short circuit and failure;
  • Do not work in explosive areas or areas where flammable and combustible liquids may be present. During operation, sparking occurs in the screwdriver, which can lead to a fire or explosion of flammable vapors and dust;
  • It is unacceptable to use the tool if you are very tired, under the influence of medications, alcohol or drugs;
  • Keep children and unprepared people away unauthorized persons to use the tool;
  • When using the tool, wear safety glasses and protective clothing;
  • The battery contains corrosive liquid inside. To avoid chemical burns, do not open batteries.

Selection of cordless screwdrivers

Before choosing a cordless screwdriver, the buyer needs to decide for what future tasks it is intended.

Depends on necessary set functional characteristics screwdriver, such as speed, maximum torque, number of batteries and other indicators indicated above in the “technical specifications” section of this article.

For household and amateur use, a tool with reverse, brake and the following characteristics is quite sufficient:

Speed ​​in two-speed version, 0-400 rpm (1st gear), 0-1200 rpm (2nd gear);
- maximum torque 20-25 Nm;
- quick-release chuck 0-10 mm;

If you plan to use the tool “from time to time,” then you can get by with one battery with a charging time of 3-5 hours.

Two batteries with a short charge time are naturally much more convenient. If one battery is discharged, replace it with a second, pre-charged one, and continue working. We charge the discharged battery.

Charger

The option with two batteries will be slightly more expensive. It is also advisable to have a plastic suitcase (case) in which a screwdriver, charger, batteries and working tools are neatly placed.

There you can get qualified advice, test the tool, and make a purchase with a sufficient warranty period.

Pay attention to the products Russian manufacturers. Currently, Russian instruments can be significantly cheaper than imported ones with equal technical characteristics and workmanship.

In any case, the choice is yours, based on your “needs and material capabilities,” you will choose exactly what you need!

I wish you successful shopping, success in your work and a pleasant holiday!

And as always, traditionally, to reinforce what you have read, we offer you a video on the topic.

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Screwing in a screw is one of those tasks that appears seemingly out of nowhere, but with enviable consistency. Fixing a lopsided closet door, hanging a mirror in the hallway, attaching a shelf in the bathroom are small everyday problems that need to be solved daily. It is possible to tighten a bolt, screw or self-tapping screw using a screwdriver, but it does not always work. Anyone who has tried it knows: it is a thankless, lengthy task, and the result is often zero. And it needs to be done quickly and efficiently.

Buy an electric one for everyday use household work around the house - the best way out. Not to mention the fact that it is indispensable in the work of professionals. It is used on construction sites, during repairs and in furniture workshops. Installation is carried out using a screwdriver plasterboard structures, installation of windows and doors, fastening skirting boards and assembling furniture.

Choosing a screwdriver based solely on its cost is a grave mistake. They differ in power and various functions. In order not to make a mistake when choosing, you should carefully study its technical characteristics before purchasing. The main ones are rotation speed, torque and type of battery (in a cordless tool). But reading the digital data is half the battle; you also need to be able to navigate which indicators are needed specifically for you and for the planned work.

1. No need to overestimate: buying a household screwdriver for professional work


The screwdriver can operate from the mains or from the built-in battery. Not only the mobility of the tool, but also its power depends on the type of power supply. Small and convenient cordless tool - best helper for the home handyman. It has all the necessary functions, and it weighs very little, so your hands don't get tired. But the main disadvantage of a cordless screwdriver - low power - will play a cruel joke on those who plan to use it as a professional tool. That is, a lot and often. For the pros, you need a completely different power. The professional price is higher. Most often it is tied to a power outlet, but can withstand intense loads well.

2. Incorrect battery selection


The most expensive part of the tool. More than half the price you pay is for the battery. In order not to run every 20-30 minutes with a cordless screwdriver to the outlet for recharging, read the battery data sheet. We recommend that you carefully consider these parameters.

  • Voltage (determines power)
  • Capacity (affects operating time)
  • Memory and self-discharge effects (much better when they are absent)

3. Buying low-capacity batteries for long-term use


Battery capacity directly affects operating time. The higher the capacity, the longer it can work without recharging. Capacity is measured in ampere-hours and depends on which element is installed inside the battery. Cadmium batteries have the smallest capacity, and lithium-ion batteries have the largest capacity. Therefore, for long-term work, choose a lithium-based screwdriver. It costs 2-3 times more, but provides a guarantee of work for several hours.

4. Long battery charging time


Charging time different models miscellaneous. A professional tool needs about an hour. Amateur - 5-7 hours. Buying a screwdriver that takes longer to charge than it does to work is a forgivable mistake for a home craftsman. This tool is rarely used. And its long-term recharging does not bring any inconvenience. For the "pros" - long time charge nullifies all its work. Charging time depends on the characteristics of the battery and charger.

5. Buying a single-speed screwdriver for drilling and screwing


Screwdriver - universal tool. Usually, in addition to “tightening and unscrewing,” he is also capable of drilling. But not all models have this function. Often, a buyer assumes that when purchasing a single-speed tool, it will perform screwdriving and drilling tasks. This is a common mistake. To operate in screwing mode and drilling mode, it must be equipped with a speed controller. Drilling is performed at a different speed than screwing. Work with different materials implies different speeds.

6. Buying a cordless screwdriver for very rare jobs


If you use a screwdriver once or twice a year, then it is better to buy an electric tool that runs from an outlet. After all, every accumulator battery has its own shelf life. It needs to be charged and discharged, if not constantly, then often. Otherwise, it greatly loses capacity. If the storage period is exceeded, the electrolyte stratifies and the metal plates inside are covered with salt.

7. Wrong selection of battery type


If you make the wrong choice of battery and do not know the specifics of its operation, you will eventually realize that it is not suitable for you at all. Therefore, please note that screwdrivers use three types of batteries:

  • nickel-cadmium (Ni-Cd). Inexpensive. But low-capacity and toxic. They suffer from self-discharge and “memory effect”. It cannot be stored for a long time without charging. And the biggest disadvantage is that you cannot charge a battery that is not fully charged. That is, the possibility of recharging during a smoke break is excluded.
  • nickel metal hydride (Ni-MH). Initially developed to replace nickel-cadmium batteries, but due to the same shortcomings they could not take their rightful place in the range of batteries for power tools. More powerful, with the same dimensions, compared to Ni-Cd batteries. The charge cycle varies in the range of 200-300 recharges. The developers have eliminated the problem of the memory effect, so they can be recharged. The only problem - high degree self-discharge, compared with other types of batteries.
  • lithium-ion (Li-Ion). Most Popular. Large capacity and power. Do not lose containers in the cold. The number of full recharges is 3000. You can charge at any time without waiting for complete discharge. There is no memory effect. Self-discharge too. But their price is much higher.

8. The most powerful is not always the best


A powerful screwdriver is needed for long-term work with maximum load. If these are not planned, you should not choose higher power. Powerful has its drawbacks:

  • It's heavy. It is inconvenient to work with weight, your hands get tired.
  • Large dimensions. You will not be able to work in hard-to-reach places.

For household work, it is better to take a screwdriver that is less powerful, compact, but with good torque.

9. Buying an impact driver instead of a hammer drill


If it has a shock mode, this does not mean that it will be able to chisel a wall or stone. A screwdriver is not a hammer drill. Runout mode is used for more efficient tightening of bolts and screws.

10. Incorrect cartridge selection


There are two types of cartridges:

  • Quick-release (quick chuck). Requires no clamping tools.
  • Key. To clamp them, you need a special gear-type wrench.

Quick-clamping - much simpler and more convenient. If you have to work with frequent changes of consumables (for example, a drill, a bit), then it is recommended to take a screwdriver with a quick-release chuck. The key chuck slows down the work greatly.

11. One battery is good, but two are better


If the kit includes another battery, this is a huge plus for your screwdriver. Spare battery gives additional features. While working on one battery, the second can be charged, and then vice versa. This results in continuous work. But for household chores, one battery is enough; you shouldn’t overpay for an extended set. But for professional work, this is an excellent option; in some cases, you can stock up on another battery for future use.

12. Wrong choice of packaging


Most cheap option packaging - cardboard. But it won't last long. The packaging will be torn. Then there will be nowhere to store the screwdriver. For an amateur who bought an instrument for an apartment or house, this will not be a problem. But a professional master needs a case. You should choose it in a plastic suitcase. It is convenient for storage and transportation. There are also thoughtful modular cases. They are attached to each other and can be transported in a wheelbarrow. These are the optimal plastic suitcases for professionals like L-boxx or MetaLoc. Cases with such a system are often used by popular tool manufacturers: Metabo, Bosch.

13. Choosing to smuggle

Buy a screwdriver from an unknown manufacturer and you will be left alone with a broken tool. No warranty, no service, no spare parts. Never be tempted by the too low price of power tools from the “China-made” series. Please note that “gray goods” do not have an official guarantee, but reliable trade marks They provide both a guarantee and service at service centers.

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

Model specifications......................................................... 4

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

Scope of delivery:

1. Cordless drill/driver

2. Battery

3. Charger

4. Set of bits

5. Operation and maintenance instructions

Safety regulations.

Attention! Power tools are high-risk equipment. When using power tools, to avoid the risk of electric shock, personal injury, or fire, the following basic safety precautions must be STRICTLY observed. 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 areas, such as those 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 turning on, check whether the supply voltage of your power tool matches the mains voltage; Check the serviceability of the cable, plug and socket; if these parts are faulty, further operation is prohibited.

Double insulated power tools do not require connection to an outlet with a third grounded wire. For power tools without double insulation, connection via a socket with a grounded wire is mandatory.

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 damp places is unavoidable, current must be supplied to the power tool through a special breaker device that turns off the power tool in the event of a leak. Rubber electrician gloves and special footwear will further increase your personal safety.

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

Handle the power cord carefully. Never use the cord to carry power tools or pull plugs from an outlet. Keep the cord away from high temperature, 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

Be alert, watch what you are doing at all times, and use common sense when operating power tools. Do not operate power tools while you are fatigued or under the influence of medications or reaction inhibitors, alcohol or drugs. This could result in serious injury.

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

Avoid sudden switching on. 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 adjustment and/or setting keys before operating the power tool. A key left behind and caught in moving parts of a power tool can cause damage to the power tool or serious injury.

Keep your balance securely. Use good support and always maintain good body balance. Proper support and balance ensures reliable control of the power tool in unexpected situations.

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

Safety rules when 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 circuit breakers that supply electrical power to the work area.

If the drill/attachment jams while working, immediately turn off the drill, release the drill and then continue working.

Wear noise-cancelling headphones when using power tools for a period of time. long work. 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.

Securely secure the workpiece when drilling. Never hold the part in your hand or under your feet. Poor fastening of the part can lead to deformation of the attachments leading to loss of control over the tool and possible injury.

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

Position yourself while working so that you are not pinched between the tool or auxiliary handle and walls or pillars. If the accessory becomes bent, it will cause the power tool to kick back and may cause injury.

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

Only the branded battery 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 operating the equipment:

Using Power Tools

Use clamps, clamps, a vice, or other method of securely securing the workpiece. Holding the workpiece with your hand or body is not secure and may result in loss of control, tool failure or personal injury.

Do not overload the power tool. Use power tools appropriate for your job. Properly selected power tools allow you to do a better job and provide greater safety.

Do not use the power tool if the ON/OFF key does not work. Any power tool that has a faulty on/off switch is EXTREMELY dangerous and must be repaired before operating.

Disconnect the plug from the power source before making any adjustments, replacing accessories or accessories, or when storing the power tool. Such preventive measures safety features reduce the risk of accidentally turning on the power tool.

Keep power tools out of the reach of children and other people untrained in using power tools. Power tools are dangerous in the hands of unskilled users.

Perform required maintenance on power tools. Properly maintained power tools with sharp blades allow you to get the job done more easily, efficiently, and improve safety. Any changes or modifications are prohibited as they may cause damage to the power tool and/or personal injury.

Regularly check the tool for adjustments, deformation of working parts, broken parts, and conditions of the power tool that could cause the power tool to not operate properly. If there is damage, have the power tool repaired before starting work. Many accidents are caused by poorly maintained power tools. Create a periodic maintenance 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 switching locks.

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

The range of cordless drills and screwdrivers includes two-speed products. Low rotation speed ensures low rotation speed and high strength moment to perform heavy work, as well as tightening screws.

The high speed selection is intended for light work at high speed and low torque.

Attention! Clearly set the rotation speed positions, avoid intermediate positions: this will lead to gearbox failure.

Torque force adjustment:

There is a “drill” icon on the ring for switching the position of the torque force. This position is intended for drilling and labor-intensive screw tightening.

Quick stop:

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

Charging the battery.

To charge the battery you must:

· 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 into the charger.

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

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.

· Once fully charged, 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 its maximum.

· As you work, the battery capacity decreases.

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

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

Rules for the care and storage of equipment.

During storage, adjustment or replacement of attachments, it is necessary to disconnect the battery from the product, the “On/Off” switch button. should be in the off position. This reduces the likelihood of accidental activation.

During storage, keep the battery away from metal objects: paper clips, coins, keys, nails, screws - and other small metal objects that may come into contact internal parts battery, leading to sparking and possible fire.

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

During operation, only hold 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 chuck or attachments with your hands.

When installing the drill, ensure that the shank is positioned correctly on the chuck jaws.

Do not install broken or worn attachments.

Do not move a running cordless drill/driver along your body.

Attention! To avoid damaging the battery after purchase, you must fully charge the battery within 5 hours!

Battery/charger.

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

Life time.

If the requirements specified in this manual and in the warranty card are met, the service life of the product is 3 years

Guarantee obligation.

On electric tools The warranty applies according to the period specified in the warranty card.

You can familiarize yourself with the terms of warranty service in the warranty card attached to the operating instructions.

Powered by a built-in battery, it has significant advantages over wired models - autonomy, mobility and ease of manipulation of 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 select the required tool model based on its purpose and basic technical indicators:

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

Types of rechargeable batteries, their features

As with all power tools, the battery is the weakest part of a 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 great possible number charge-discharge cycles (up to 1000), allowing them to be used for 20 years, and secondly, this is the ability to withstand big differences temperatures without deteriorating its technical characteristics.

Disadvantages limiting their use on a wider scale include:

  • relatively big sizes and mass;
  • 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 of using batteries until they are completely discharged. However, frequent recharging also negatively affects their capacity. Unfortunately, all of these advances came at the expense of reduced battery life and the inability to use batteries in subzero temperatures.

Li-ion batteries began to be produced on a mass scale by Sony since the 90s of the last century and became widespread due to their low weight, high capacity and uncritical requirements for recharging the battery until it is completely discharged. These advantages of Li-ion batteries perfectly meet the requirements of developers of professional autonomous power tools, including screwdrivers, which are used by craftsmen continuously throughout the entire work shift.

Video: Cordless screwdrivers - how to choose.

Technical characteristics of the cordless screwdriver

Main technical parameters batteries are capacity and voltage. The larger the battery capacity, measured in ampere-hours (Ah), the greater the electrical charge it can accumulate, and accordingly, the longer the tool will operate in autonomous mode. The battery capacity of 1Ah, stated in the product data sheet, means that it can supply 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 drilling applications large diameters or driving screws into hard materials. Low-power tools with 3-6V batteries are used for drilling thin holes and driving thin screws into not very hard materials.

Most popular among consumers household tools are equipped with built-in batteries with a nominal voltage of 12V, as having the most optimal ratio cost, battery life and power. When operating the device, you must keep in mind that optimal performance and service life of the tool are ensured only when using the type of battery specified in its data sheet. When installing a battery with more low voltage The performance of the screwdriver will be insufficient, and when using a battery with an increased voltage, premature wear of the motor and rapid breakdown of the tool will occur.

Cordless screwdriver device

1. Maximum torque

Torque, measured in newtons per meter (N/m), determines the force developed by the tool when driving a screw or rotating a drill, and depends on the engine power and spindle speed. For models used for domestic purposes, it is enough to have a maximum torque of 12-20 N/m, while professional screwdrivers are capable of developing up to 100 N/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 you need to have a low rotation speed of the bit of 400-550 rpm. This problem can be solved using a switch or engine rotor speed controller. The more maximum speed rotation developed by the electric motor rotor, the more productive the tool. Adjusting engine speed is usually achieved by changing the voltage applied to its winding through a potentiometer controlled by a motor control button.

3. Chuck type

The screwdriver can be equipped with both a key chuck and a quick-release chuck. The second type, unlike the first, does not require the use of a key to secure the bit and thereby saves the time required to replace it. In addition, there is no need to constantly carry a key with you, which is often lost at the most necessary moment. However, the quick-release chuck is inferior in terms of reliability and clamping strength and allows the drill to rotate under high material resistance.

Video: How to choose a screwdriver for your home

Additional features and accessories

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

  1. reversing the direction of rotation of the spindle allows not only tightening, but also unscrewing screws, making it easier to remove jammed drills from the hole;
  2. adjusting the torque allows you to increase the accuracy of drilling and prevents overtightening and breaking of the slots on the screws;
  3. spindle lock makes it possible to replace attachments in the chuck with one hand;
  4. illumination of the drilling site is convenient for carrying out work in unlit and dimly lit places;
  5. the presence of a case for storing tools and components best ensures their safety and readiness for work;
  6. a double set of replaceable batteries allows you to work with the tool without interruption for recharging;
  7. The ergonomics of the device play an important role. A heavy tool must be comfortable and secure in the hand, so as not to tire it while working, and be well balanced, without causing additional effort on the part of the person to hold it.

Choosing a cordless screwdriver, which one is better by brand

The production of power tools is carried out by many different domestic and foreign companies, the products of which differ markedly in the set, reliability and cost. Brands such as Makita, Bosch and Hitachi have earned great popularity among them due to High Quality products and their durability, despite the high cost. The products of Black&Decker and Interskol are also in good demand. You should choose a cordless screwdriver, which is better according to the manufacturer’s brand, 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:

  • a powerful electric motor that allows continuous operation for an hour;
  • original charger, providing gentle charging and extending battery life;
  • accelerated braking and automatic locking of the keyless chuck, ensuring the convenience and speed of changing attachments.

The model performs excellently during installation and repair work in the process of drilling small-diameter holes and tightening self-tapping screws or medium-sized screws. The manufacturer gives users registered on the company’s website the opportunity to receive 3 years of warranty service for branded tools.

2. Hitachi DS 12 DVF3 has:

  • gearbox with two-speed transmission, allowing high rotation speed and great importance torque;
  • a powerful flashlight that provides comfortable conditions work at night and in dark rooms;
  • safety clutch, providing 22 options for fastening equipment and allowing individual adjustment of the torsional force applied to specific type fasteners and materials;
  • electronic speed control circuit and reverse 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 Makita 6281DWPE model has:

  1. powerful electric motor and gearbox with two-speed transmission, providing high drilling speed large holes and high torque;
  2. reverse rotation and electronic adjustment of its speed, allowing you to quickly cope with fasteners;
  3. single-socket chuck with automatic locking, allowing quick changes of working attachments while holding the tool in your hands.

4. The DeWalt DC 727 KA drill/driver 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 ensures the chuck stops in case of high material resistance;
  • smooth speed control, allowing the tool to work with small fasteners.

The reasonable price distinguishes the model for use in installation and repair work.

Popular household models of screwdrivers:

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

  1. reverse function;
  2. 12 stages of torque setting;
  3. simple execution and maintenance;
  4. long service life;
  5. comfortable handle and light weight that does not tire your hand.

2. “Interskol DA-18 ER” is excellent for work such as redecorating apartments or assembling furniture after moving. The model is a drill-driver with a very capacious battery that allows you to work for a long time without charging. Convenience of work is ensured by good balancing of the tool.

The Government of the Russian Federation has expanded the list of technically complex goods, adding a new item to it - electrified tools (hand-held and portable electric machines) (Resolution of the Government of the Russian Federation dated September 17, 2016 No. 929 "). These, for example, include electric drills, electric grinders and electric cutting machines, electric impact wrenches, electric hammers, etc. ().

This change means a special procedure for regulating consumer rights when defects in goods are discovered. In particular, they may refuse to fulfill the purchase and sale agreement and demand a refund of the amount paid or exchange the product for a similar one, but at a different price. general rule within 15 days from the date of sale (clause 1 of article 18 of the Law of the Russian Federation of February 7, 1992 No. 2300-I ""; hereinafter referred to as the law on the protection of consumer rights).

But at the same time, you can perform the specified actions after 15 days, but only in the established list of cases: if a significant defect in the product is discovered (for example, which cannot be eliminated), if the deadlines for eliminating the defects are violated. This also applies to cases where the product cannot be used during each year of the warranty period in total for more than thirty days due to repeated elimination of its various deficiencies ().

If the seller, at the conclusion of the contract, stipulated that he was selling goods with defects, are the corresponding requirements of the buyer subject to satisfaction? Find out from the material "The rights of the buyer when defects are discovered in the goods" in "Home Legal Encyclopedia" Internet version of the GARANT system. Get 3 days free!

By the way, technically complex goods currently, including: digital photo and video cameras and lenses for them, refrigerators, computers, game consoles with a digital control unit, mechanical wrist and pocket watches, as well as electronic ones, etc. The same applies to some Vehicle– cars, motorcycles, floating vehicles with an electric motor and others (Resolution of the Government of the Russian Federation of November 10, 2011 No. 924 "").