Power tools are included in the list of technically complex goods. How to choose the right cordless screwdriver Models from different manufacturers

During repair and construction work, a good quality screwdriver is indispensable. Such a tool is a necessary thing if you need to assemble furniture, unscrew an old screw, or hang a cornice or a wooden shelf. Since there is a huge range of such devices on the modern market, it is rather difficult to stop the decision on one or another model. But how to choose a cordless screwdriver for the home? What functional characteristics are of particular importance, and what can be easily overlooked? How not to make a mistake when choosing? More about this in our publication.

A cordless screwdriver for the home is used equally by apartment owners and those who live in their own cottage. Basically, such a device is used for:

  • Screwing and unscrewing fasteners (bolts, self-tapping screws, screws, screws);
  • Installation work (to tighten anchors and dowels);
  • To drill through wood and metal surfaces;
  • To cut threads in metal parts.

This device consists of several elements:

  • An electric motor that rotates at a certain speed;
  • Planetary type gearbox, which is equipped with a clamping chuck and transfers force to the spindle;
  • Attached to the gearbox by a clutch that regulates the torque;
  • A clamping chuck for attaching nozzles (bits) to the motor shaft.
  • An electronic control system equipped with a special button for starting the device and a reverse switch;
  • A battery that is used as a power source.

Varieties of screwdrivers

The name "screwdriver" is often used to name several types of tools, the functionality of which is largely similar. We can distinguish the following main types of screwdrivers for the home:

  • Electric wrenches;
  • Electric screwdrivers;
  • Drill drivers (the most common type of these devices)

Torque

This indicator determines the force with which the screwdriver resists the load or applies it to the screw being screwed. As a rule, for domestic purposes, this device is equipped with a torque ranging from 10 to 15 Newton meters. Professional screwdrivers have a torque of up to 130 Nm. Such functionality is allowed to drill fairly hard materials. The motor shaft for professional screwdrivers makes 1300 revolutions per minute, for household data devices the figure is 500 revolutions.
The range of standard sizes (diameter and length) of the screwed screws, as well as the hardness of the available working surfaces, depends on what the torque is. An important difference between a screwdriver and other power tools is that you can adjust the torque due to the presence of a special limiter (a ring located after the chuck). Thanks to this functionality, it is possible to reduce to an absolute minimum the likelihood of bit wear, too deep recession into the surface, as well as a breakdown of the slot at the self-tapping screw. The screwdriver is protected from overload by a ratchet at the motor coupling. It is she who allows the rotating shaft to slip freely. Thanks to the set maximum torque, you can not overload the engine and turn out the tightest screw.

Good battery

When thinking about how to choose a screwdriver, be sure to carefully consider the battery. After all, it is not very comfortable to run around to recharge such a device every half an hour. In principle, it is not difficult to stop the decision on one or another option. It is enough to choose a more powerful analogue. Ideally, you can also buy a spare battery. In some models, such a battery is included. The time required for recharging differs depending on the device. For example, for a professional screwdriver, this is about an hour, for an amateur - about seven hours.

Types of batteries

As a rule, several types of batteries are used in screwdrivers:

  • Lithium-ion;
  • Nickel-cadmium;
  • Nickel metal hydride.

The most popular at the moment are screwdrivers equipped with environmentally friendly Ni-MH batteries. In addition to environmental friendliness, they have several advantages: compact size, low weight, no memory effect. But there are also disadvantages: such batteries do not like electrical overloads and low temperatures. In addition, their cost is quite high. But they are more powerful and don't have as much memory effect as nickel-cadmium ones. The number of recharging with a stable capacity is 1500 times. Important: you can not store these batteries in a discharged form, only in a charged one.
Another battery option is nickel-cadmium. They are more toxic. The number of recharges here is twice that of Ni-MH (nickel-metal hydride). This option is cheaper, it is not at all afraid of frost. But there are also disadvantages: batteries of this type suffer from strong self-discharge and memory effect. For storage, it is better to completely discharge them. Otherwise, there is a risk of getting a battery with a lower capacity.

Sometimes there are models with lithium-ion batteries. This type is sensitive to low temperatures. They don't have high power. The number of recharges is within 3000. There is no memory effect. The cost of such batteries is quite high, although this option is quite convenient to use. The service life and allowable number of charge cycles in this case is at least two or three times higher than those of nickel-cadmium batteries. When deciding how to choose a good cordless screwdriver, take the time to choose a battery. After all, it is this component of the device that is almost half of its cost. Therefore, it is important to compare the following parameters:

  • Battery capacity and voltage;
  • Absence or presence of a memory effect;
  • Absence or presence of self-discharge.

The battery is a removable element consisting of several power sources concentrated in a common housing. Such elements are fastened together with plates. At the output, the total voltage is summed up, amounting to 18, 24, 12, 10 volts. The capacity depends on the volume of the element installed inside the battery. It is she who determines the operating time and the total number of recharges. The capacity decreases over time. The charge memory effect is the ability to lose capacity when the battery is not discharged and then fully charged. That is, you need to completely discharge it before charging. An idle charged battery loses its charge anyway. In this case, not only the output voltage of the battery is important, but also the ratio of the current to the operating time. This value is measured in amperes per hour. Higher ratings provide a longer period of time that the battery will hold a charge.

Which drill chuck to choose?

There are several types of chucks for screwdrivers: key and keyless. For the key, a special gear-type key is used. Such a cartridge may have either one or two clutches. In the second case, we are talking about a quick-clamping mechanism. Keyless chucks can be two- or single-sleeve (it is much easier to work with this option, because the entire operation can be performed with the movement of one hand). We recommend taking screwdrivers with a quick-release chuck, they are much more convenient and easier to use.

The presence of a reverse

Reverse or reverse stroke helps to pull a hopelessly stuck drill out of hard material or unscrew a tight screw. The switch to the reverse mode for convenience is located directly with the start button of the device. It has two provisions. Thanks to the position between them, the device can be blocked.

Design and comfort of use

If it is important for you to purchase a good device, you should not trust viewing beautiful photos, because comfort is difficult to determine visually. It is better to hold such a device in your hand, check if the buttons are tight, and whether it is convenient to switch them.

Equipment

Depending on a particular model, the complete set of a screwdriver may differ. The best option is to have several nozzles for different screw heads. So you can save both time and money on their subsequent purchase.

Key Findings

For a household screwdriver, several parameters are important:

  • Torque indicator from ten newton meters;
  • Revolutions per minute 400-500;
  • Two operating modes (drilling and twisting);
  • Reverse function;
  • Battery type of device;
  • Nickel-metal hydride or nickel-cadmium battery type:
  • Voltage ranging from 10 to 14.4V;
  • It is better to opt for a higher value of ampere / hour;
  • The presence of a flashlight (as additional lighting during work or as a device to ensure the complete discharge of nickel-cadmium batteries);
  • Special belts for comfortable placement of the device on the master's belt.

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

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

screwdriver- this is a type of power tool in which, on the contrary, the main function is screwing and unscrewing screws and screws, and drilling is in second place.

In other words, a screwdriver is a special drill designed for screwing and unscrewing screws and screws, which directly follows from the name of the tool.

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.

A screwdriver in recent years has become an increasingly popular tool for the mandatory set of an amateur master and is most in demand in the country, at home, in the garage.

This tool allows you to greatly facilitate the work and increase its productivity in various construction, repair and assembly work.

In this article, we will only consider cordless screwdriver, since its device and principle of operation is similar to an electric screwdriver connected to the mains with a cord.

The only difference is that the cordless tool is not connected to the network, but uses the built-in battery as a power source.

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

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

The device of cordless screwdrivers

The cordless screwdriver "originated" from an electric drill, so their device has similar design components, but there are also differences.

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

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

Reducer- 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 assembly, which allows you to set 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 indexed ring. When the set torque is reached, the “ratchet” is activated and the screwing stops.

If insufficient torque is given, the screw will be undertorqued. If an excessive torque is set, the screw will be deeply recessed into the "body" of the bar.

Cartridge- performs the same function as in a drill, namely, it serves to install working tools (bits, drills and other nozzles).

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

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

Battery– in cordless screwdrivers, batteries of the following designs can be used

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 the internal structure of each type of battery and the chemical processes that occur in them in various modes. This is quite difficult, and not necessarily for the user.

We will limit ourselves to the characteristics and properties of batteries necessary for the optimal choice of a screwdriver model in relation to your capabilities and needs.

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

Ni-Cd batteries used in screwdrivers and other power tools for a long time.
- service life - up to 5 years; (*)
- cycles (charge-discharge) - up to 1500;
- minimum temperature of use - up to minus 15°С;
- charge time - 3-7 hours;
- the presence of "charge memory" - yes;
- weight - significant;
- price - (with equal battery capacity) of the three options is the lowest.
Batteries of this type are recommended to be charged and discharged completely, otherwise the battery capacity will decrease. It is recommended to store such batteries in a fully 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 currently 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°С;
- charge time - 1 hour;
- the presence of "charge memory" - no;
- weight - insignificant;
- price - (with equal battery capacity) of the three options is the highest.

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

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

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

To ensure the battery life specified by the manufacturer, it is necessary to strictly comply with the conditions for their storage, use, charge - discharge, recommended by the instructions.

Frame- serves to fasten all components and controls of the screwdriver to each other and protect 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 cases.

Specifications

Consider the technical characteristics of various models of cordless screwdrivers, meaning as a buyer not a professional builder, but an amateur summer resident or a home master.

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

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

Safety regulations for the operation of a cordless screwdriver

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

However, some other hazards are still possible if this power tool is used incorrectly.

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

  • Before starting work, you must carefully study the rules for use and safety precautions set out in the operating instructions for your screwdriver;
  • In the process of charging the battery, the charger is connected to a 220 V electrical network, 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;
    - charge only under recommended conditions and in accordance with the specified modes (room, temperature, time);
  • Do not allow moisture or snow to get inside the tool, this will prevent a short circuit and its failure;
  • Do not work in explosive areas, in areas where flammable and combustible liquids may be present. In the process of working in a screwdriver, sparks occur, which can lead to ignition or explosion of combustible vapors and dust;
  • It is unacceptable to use the tool with severe fatigue, under the influence of drugs, alcoholic or narcotic substances;
  • Do not allow children and untrained unauthorized persons to use the tool;
  • Wear protective goggles and protective clothing when using the tool;
  • The battery contains corrosive liquid inside. To avoid chemical burns, do not open batteries.

Choice of cordless screwdrivers

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

The necessary set of functional characteristics of a screwdriver depends on this, such as the number of revolutions, maximum torque, the number of batteries and other indicators indicated above in the "technical characteristics" section of this article.

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

Number of revolutions in two-speed version, 0-400 rpm (1st gear), 0-1200 rpm (2nd gear);
- maximum torque 20-25 Nm;
- keyless chuck 0-10 mm;

If the use of the tool is planned "on occasion", 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. In case of discharge of one battery, we replace it with a second, pre-charged, and continue to work. We put the discharged battery on charge.

Charger

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

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

Pay attention to the products of Russian manufacturers. At present, a Russian tool can be much cheaper than an imported one with equal technical characteristics and workmanship.

In any case, the choice is yours, based on "needs and material opportunities" you will choose exactly what you need!

Successful purchases, success in work and a pleasant stay!

And as always, traditionally, to consolidate what you read, we bring to your attention a video on the topic.

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

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

Scope of delivery: ............................................................... ................. four

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

Keep the work area 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 circuit breakers that supply electrical power to the 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 faulty 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 the internal parts of the battery to come into contact, leading to 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 familiarize yourself with the terms of warranty service in the warranty card attached to the instruction manual.

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

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

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

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

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

Please check the portable power tool requirements before purchasing. 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 direct current, 380 volts - at alternating current.

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 are connected to the ground, or with technological equipment - on the one hand, and with the 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 general requirement for individual users is to operate 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 personal protective equipment, which includes a cotton suit or 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.

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