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What is the difference between brushed and brushless motors? How to choose a screwdriver. Recommendations, useful tips, companies. Brushless screwdrivers: advantages of the best models

Good day Muskovites!
I present to you a review of the DeWALT DCD996 cordless brushless screwdriver, which I purchased on ebay in the USA.
I continue the series of reviews about the DeWALT tool.

Purchase history. I bought a screwdriver a few months ago. After I decided on the choice of the Dewalt 20v system (in Europe and Russia the tool comes with the same indexes, but is labeled as 18v). Then for two weeks I monitored ebay in search of a suitable lot. If you're in a rush, you can overpay $20-30. I was happy with the price of $136.98 including delivery and bought the lot. The lot was only a tool, instructions and a pen, there was no yellow cardboard box, only a bag because... lot from the set. USPS priority shipping. Delivered in three weeks to my post office.

This screwdriver model is the top model in the 20 volt DeWALT line.
Specifications:
Torque adjustment 11 positions + drilling + drilling with impact.
Maximum drilling torque 95Nm
Maximum soft torque 66Nm
Output power 820W
The cartridge is completely metal from 1.5 to 13mm (I clamped 0.8 without problems)
The motor is brushless.
Handle seat 48.5mm (cannot be placed on a drill stand without collective farming)
The gearbox housing is metal.
3 speed gearbox.
Drilling speed:
0-450/0-1300/0-2000 RPM
Impact drilling speed:
0-500/0-1500/0-2250 RPM
Hit:
0-8600/0-25500/0-38250 BPM
Carcass weight with handle 1570g
Weight with handle and homemade 6Ah battery 2200g

The instrument is made in the USA from global materials. The rubberized handle fits comfortably in the hand, although it is certainly heavy. But if compared with the previous 885 brush model, Shurik has become smaller and has added power.
This shurik is for hard work. And for small jobs I have 10.8 Metabo. The gearbox housing is metal. I think there is no point in disassembling it; installing plastic gears seems to have not been noticed by Devault. There is a belt clip that can be placed on either side. The torque control has not only a mechanical, but also an electronic clutch. Those. When the moment is reached, the electronics stops the engine, starting can only be done after releasing the button. The cartridge has a freewheel. The cams have carbide inserts. The equipment is clamped and removed with a click. There is a direction/lock switch button.
The backlight switch is located by the handle. Any mode is activated only after briefly pressing the trigger.
The backlight has three modes:
1 weak light turns off after 20 seconds of inactivity
2 middle light turns off after 20 seconds of inactivity
3 bright light turns off after 20 MINUTES of inactivity
I will note that I liked the feature. The backlight in mode 3 is very bright and the tool can be used as a flashlight where there is no light.

Backlight operation

I would like to note one plus of this model. At first speed, with minimal pressure on the trigger, the shaft will rotate very slowly. I also observed this advantage in other 18v devolts that I watched offline.
What can I say, the screwdriver feels like it works and performs all its functions. It's nice to hold in your hands. Dope in the drill car.

Comparison with baby Metabo:

Additional Information

A screwdriver is a tool that no craftsman can do without these days, and even at home it can come in handy at any time. A screwdriver is in demand for many reasons, including:

Mobility. The tool is battery powered, so you don't need a power outlet to use it.
Multitasking. A screwdriver can be used to tighten screws, drill holes in various surfaces, and some models can also serve as a hammer drill.
Availability. In hardware stores, for little money you can buy fairly affordable devices that can cope with everyday needs.

The range of screwdrivers is very wide. Many manufacturers produce a variety of devices that differ in design, power, backlight, reverse, etc. You will find out which models are truly the best in 2019.

In this rating, we will look at the top 10 best screwdrivers, and you will find out which professional screwdriver to buy or an inexpensive tool for the home. Each position was evaluated in terms of reliability, design, availability of additional functions, and price/quality ratio.

10. Einhell TC-CD 18-2

This model, in addition to the functions characteristic of a conventional screwdriver, is also equipped with an impact mechanism that allows you to drill with impact. The screwdriver is equipped with a powerful motor and a metal 2-speed gearbox, as well as an emergency stop function and a keyless chuck.

It is also worth noting the presence of LED backlighting, which illuminates the work area quite well and the ability to adjust the rotation speed depending on the type of material.

The model comes in a convenient case with two batteries, an additional handle and a charger. Also included is an instruction manual.

Good build;
Stylish design;
Convenient to use;
Compact dimensions;
Impact drilling function.

Weak batteries;
Not recommended for long-term non-stop operation;
With frequent use, the hammer wears out faster (after all, this is not a hammer drill).

Main characteristics:

One of the features of this screwdriver is that it comes with two batteries - one 1.5 Ah, the second 4 Ah. This configuration allows you to significantly increase the duration of work and not waste time on recharging batteries. I would also like to note the ergonomic design and rubberized handle. It's really a pleasure to work with such a tool.

Brushless system;
Additional protection – electronic locking system;
Torque level;
There is an impact mode, thanks to which you can drill brick, concrete, etc.
LED lights;
Metal cartridge.

Quite a high price;
The case for storage and transportation is made of fabric (for some, this may be convenient).

Main characteristics:

Our top 10 screwdrivers are gradually approaching the leading positions and in sixth place is the powerful, resourceful, functional and reliable AEG BSB 18CBL screwdriver. The model has a large set of functions that are one way or another necessary when working with this tool. For example, this screwdriver is equipped with a quick-release removable chuck, overload protection, LED backlight, and two powerful batteries with a capacity of 4 Ah. One of the “tricks” of this device is that instead of the original cartridge, you can easily and quickly install an angle attachment.

Compact and convenient, fits perfectly in the hands;
Powerful, resourceful;
Rubber pads reliably protect against falls;
The batteries are equipped with a charge indicator;
The backlight illuminates the work area well;

May seem a little heavy for some;
Over time, the cartridge may become loose;
The battery does not fit tightly to the body.

AEG BSB 18CBL is a chic device that pleases almost everyone. There are drawbacks, but they are minor. You can confidently choose this screwdriver for home or professional use.

Main characteristics:

Lightweight, convenient, ergonomic cordless screwdriver Metabo BS 18 LT BL does an excellent job of both drilling and tightening screws. For more comfortable work in poor lighting conditions, backlighting is provided. Batteries with a level indicator hold a charge well. The model is equipped with a convenient switch for drilling mode and a bracket for fixing on a belt. Additionally, this model features Ultra-M technology for more efficient charge utilization and maximum power. The screwdriver comes in a convenient case, which provides space for storing various small items.

Practical and reliable;
Lightweight and comfortable;
Powerful;
Copes with any tasks;

A little expensive.

Main characteristics:

A decent cordless screwdriver with a brushless motor, a quick-release chuck, a battery charge indicator, and a convenient, ergonomic body.

It is also worth noting anti-rotation protection, which limits rotation when drilling, built-in LED backlight, overheating protection, and a metal bracket for convenient use during operation. This model has all the necessary functions and is pleased with the build quality and durability. A little expensive, but well worth the price.

Anti-rotation protection;
Fits comfortably in the hand;
Charge level indicator.

Over time, the battery may not fit tightly to the case, causing contact to be lost.

Main characteristics:

3. Dewalt XRP DCD991P2

If you are looking for the best screwdriver, then the Dewalt XRP DCD991P2 might be the one for you. The model is equipped with a brushless motor, adjustable LED backlight that can operate in flashlight mode, and a three-speed all-metal gearbox.

This screwdriver can cope with any task - from tightening screws to drilling with any drill bits. A reliable and convenient screwdriver is suitable for any type of work and in any conditions. The model deserves to take second place in our rating.

Metal gearbox;
Brushless motor;
Electronic speed control;
Powerful batteries with charge indicator;
Three-speed mode;
Convenient case for storage and transportation.

High price;
Batteries discharge quickly in the cold;
Too heavy for some jobs;
The reverse button does not have a clear fixation.

Main characteristics:

Second place in our ranking of the best screwdrivers this year is a model from the Japanese brand Makita DDF480RME.

Compact, convenient and, despite its small size, surprisingly powerful. It has all the functions necessary for comfortable work. Many of them will surprise few people, but each manufacturer has a different design.

The screwdriver is equipped with a brushless motor, good lighting, a two-speed gearbox with a convenient switch in the upper part of the body. The kit includes two batteries with a capacity of 4 Ah. It is worth noting that the batteries charge quite quickly - a completely dead battery is charged within 45 minutes.

A screwdriver is a hand-held tool of electric or pneumatic type, which is distinguished by the ability to adjust the torque and depth of screwing, and is used for various repair and installation work. Today, there are many types of screwdrivers, which differ in configuration and the presence of additional functions, performance characteristics and chuck size, type of power supply and dimensions.

Cordless screwdriver: which battery is better to choose?

A cordless screwdriver is a tool that operates from a power source that is fixed in its body. Thanks to this, you can use the tool regardless of the availability of electricity at the site or the location of electrical devices for connecting electrical appliances to the network.

Thus, a stand-alone cordless screwdriver is the best option for home use today.

It allows you to carry out not only internal but also external repairs. So, with its help you can perform roofing work in a private house without the need to stretch network cables. One of the most important components of a cordless screwdriver, on which the power and operating time depends, is the power supply. Therefore, a manual screwdriver must be selected according to the type of battery.

Today, batteries for cordless screwdrivers are divided into:

Lithium-ion. Batteries of this type have a shelf life of 3 years, are designed for at least 3 thousand charge and discharge cycles, are lightweight and charge quickly. But the cost of screwdrivers with ion batteries is quite high.
Nickel-cadmium. Such batteries can withstand only 1.5 thousand cycles, but at the same time, their shelf life is 5 years. Screwdrivers powered by such batteries are distinguished by their affordable price and ability to operate at subzero temperatures.
Nickel-metal hydrite. Batteries of this type are designed for a thousand discharge-charge cycles, but at the same time they have the lowest degree of self-discharge among other batteries. The only disadvantage of such batteries is their weight.

Thus, for your home, it is better to choose affordable power tools that use nickel-cadmium or nickel-metal hydrite batteries. A good solution would be to choose a screwdriver with two batteries. This configuration will allow you to use one battery while the second one is charging. A screwdriver with a lithium battery should not be used to solve rare household tasks: it will not pay for itself.

Electric corded screwdriver: which is better, professional or household

A corded electric screwdriver looks like a corded drill. The only difference is the presence of torque in the first one. The corded screwdriver operates from the mains, which can create some difficulties in operation.

However, corded screwdrivers have their advantages:

The time and service life of corded screwdrivers is not affected by battery charge;
A regular outlet or extension cord is suitable for powering the tool, while some cordless screwdrivers require special chargers;
You can use a corded screwdriver even at sharply negative temperatures;
In most cases, networked models are cheaper than battery-powered ones.

Corded screwdrivers are divided into household and professional. Professional tools, unlike household ones, have greater power and, accordingly, productivity, and have a body that is resistant to mechanical damage. But they also cost more than household ones. Therefore, if you need an electric screwdriver to carry out repairs in a house or apartment, it is better to take a household model. If a tool is needed for construction work at various sites and in various conditions, we choose a professional model.

Brushless screwdrivers: advantages of the best models

Depending on the type of motor, screwdrivers are either brushless or brushed. That is, the motor in the tool can be either with or without brushes. In this case, in the second case, the motor brush assembly will be replaced by an electronic one.

A brushless screwdriver has the following advantages:

Higher efficiency compared to “brush” models;
A more durable motor (the motor brush assembly in commutator models wears out quickly and often requires replacing the contacts);
Wider range of engine speed adjustment;
Smoother and quieter running.

Plus, brushless tools last longer and require no maintenance. The only disadvantages of such screwdrivers include their cost and rather large dimensions.

You can find screwdrivers with a brushless motor in almost any line of tools offered by world-famous brands that are popular thanks to the media.

For example, Makita released a brushless, battery-powered model TD136DTD137D, and Bosch has the HDS182-02L, a crash test of which proved that the tool is truly “indestructible.” A worthy model in terms of price and quality would be the professional 18-volt tool Default DCD790D2. In addition, you can find a good brushless tool on various forums in the “Recommend a screwdriver” section.

Selecting a screwdriver: criteria and characteristics

After you have weighed all the pros and cons of the various power elements of the tool and decided on the design of its motor, you need to select the model of the device. Let's look at the main technical characteristics of a screwdriver that affect its performance.

So, when choosing a screwdriver according to its parameters, you need to pay attention to:

Power;
Torque;
Rotation speed and chuck type;
Battery capacity.

Don't forget about additional functions. Thus, the tool can be equipped with a backlight unit, reverse or spindle lock. The backlight will allow you to work in hard-to-reach places with poor lighting, the reverse will allow you to spin the chuck in the opposite direction, and the spindle lock will ensure the safe change of attachments during operation.

The best screwdriver for price and quality: user reviews

Both a professional builder and a simple home craftsman will always be interested in which manufacturers of construction tools are distinguished by high-quality and durable equipment, and which models of screwdrivers are recognized today. The review below will help you answer these questions.

Thus, domestic screwdrivers from the Meteor plant and the Thorne company, which are suitable for home and garden use, have good performance, durability and an affordable price.

The best cheap, household screwdriver Interskol from the MZ ShA-6/10.8M3 line (manufacturing country Russia). The Russian-made tool, light and small, the budget Instar ACP 73218 received good reviews. The power of the tool, of course, is not enough for roofing work. But as a variety of screwdrivers, the electrical device will be indispensable. The top screwdrivers for the home included the Russian Zubr ZDA-10.8-Li-K and Varyag DA-18/2L.

High-quality and cheap Chinese screwdrivers are especially popular:

Werk cd-121 (including modification Werk CD 121/1);
Fogo 21V 2.2Ah;
Genium kc36lcd from Auchan;
Kinpow KPCD0251.

Among the inexpensive models, the reliable inexpensive Japanese screwdriver Hitachi DS18DFL and the cordless screwdriver with two batteries DSK PLi-21s from DSK Partner received positive reviews. The German, inexpensive Metabo PowerMaxx BS Quick was distinguished by its quality. Hunter makes good tools.

Rating of screwdrivers by reliability

Construction hand tools such as screwdrivers must withstand not only high workloads, but also mechanical stress, temperature, and moisture. After all, anything can happen at a construction site: a tool can fall from a great height, be left in the cold for a long time, etc. The reliability rating of screwdrivers will help you make the best choice of a high-quality tool.

So, the most reliable models today are considered:

Universal screwdriver Makita DDF454RFE with an all-metal gearbox and 18v Li-Ion battery (suitable for furniture assembly);
Professional Skil 2602 MK with two speeds, steel gears and Li-Ion battery;
Expensive, but high-quality Milwaukee CDD-202C from the M12 line with a brushless motor designed for a voltage of 12 volts.

Remember that the choice of tool determines its application. Thus, household models are unlikely to justify themselves when carrying out professional construction work. But a professional, powerful screwdriver will not be able to prove itself 100% at home.

How to choose a cordless screwdriver for your home (video)

A screwdriver is a hand-held tool that is used to unscrew and tighten fasteners and drill technological holes of various diameters. Screwdrivers are distinguished by the type of power source and motor design. Using the above recommendations, you can easily compare models and choose a reliable screwdriver specifically for your needs. A list of the best devices and customer reviews will help you make an unmistakable choice!

What is the fundamental difference between electric screwdrivers? We do not take into account the manufacturer's name on the case. Everyone knows that there are networked (powered by 220 volts) and autonomous (powered by an on-board battery) tools.

In addition, the shaft rotation gearbox can be equipped with an impact mechanism. Over the past decades, no revolutionary technologies have been invented, except for one. Let's talk about her.

The vast majority of screwdrivers have commutator electric motors. The principle of operation is as follows: switching of the windings occurs mechanically and in the armature circuit. The contacts are a collector, and the electric current is transmitted using spring-loaded brushes.

Advantages:

Proven technology.
Cheap components.
Easy to repair.

Flaws:

Large current losses on the collector, as a result - low efficiency.
Sparking, heating of the collector unit.
Dependence of torque on rpm.
Loss of power in reverse mode.
High degree of wear.
Loss of speed under load.

When developing a brushless motor, the task was to abandon mechanical switching of electric current. First of all, the switching of the windings was transferred from the rotating armature to the stationary stator. To do this, the armature windings were replaced with permanent magnets. This is slightly inconsistent with the concept of the electric motor, but does not in any way affect the overall performance.

After changing the design, there was no longer a need for constant re-switching of the current on the collector. The windings on the stator can be switched using an electrical circuit.

At the right moment, after determining the angular position of the rotor relative to the stator, the control circuit gives a command to turn on the required group of windings. For precise positioning of the armature, a Hall sensor is installed on it (like on the crankshaft of a car engine).

Advantages:

You can achieve perfectly precise positioning of the anchor.
No mechanical losses.
The efficiency of a brushless screwdriver is close to 90%.
Nothing sparks or wears out mechanically.
The absence of sparking makes it possible to operate power tools in conditions of flammable dust and high humidity.
The brushless motor is more compact and lightweight, which is important for hand tools.
There is no loss of power during reverse operation.
Overloads at maximum power do not reduce engine life.
Rotation speed control: when the load changes, the speed is stable.
Precision electronic speed control.

Flaws:

More complex design.
High cost of a screwdriver.

Result:

If we compare the advantages and disadvantages of the two types of electric motors, the following arguments can be made in contrast to the high cost of a brushless screwdriver:

Savings during operation: lower energy consumption due to high efficiency.
No loss of torque when adjusting speed.
The tool is lightweight and compact.
The service life of brushless screwdrivers is many times higher.

Popular brushless screwdrivers

Drill-driver Bosch GSR 18 V-EC - expensive, high quality, reliable

The compact brushless motor made it possible to achieve characteristics in the cordless screwdriver that are no worse than those of a corded tool.

Thanks to brushless technology, this model allows you to work on heavy surfaces without fear of draining the battery during the shift. The motor housing is no larger than the battery.

Advantages:

A set of 2 batteries with a capacity of 5.0 Ah, coupled with a brushless motor.
Powerful torque (31 Nm) with the ability to softly change the level.
Mechanical switching of two gear stages.
Compact dimensions allow you to work in confined spaces.
Installation of drills with 13 mm shank.
Rich equipment: case, tool case insert, magnetic bit holder.

Flaws:

High cost (I suspect it’s a brand) - 23,000 rubles.
Heavy weight: 1.7 kg. A bit heavy even for a cordless tool.

Dewalt 18.0V XR Drill Driver - Average Performance at a Moderate Cost

In order to stay within the reasonable price range, the manufacturer saved on everything except the carrying case. The characteristics are sufficient, nothing more. When you try to use a drill-driver “to the maximum”, you immediately feel the limit.

At the same time, the tool vigorously drills, twists, and grinds. When doing homework, there is no shortage of characteristics. An acceptable alternative to a traditional commutator screwdriver.

Advantages:

Moderate price (as for a brushless motor), brushed models are often offered for that kind of money - 11,800 rubles.
High torque despite power limitations.
Well-thought-out ergonomics: you can operate freely in hard-to-reach corners.
The screwdriver is very light: only 1.15 kg with battery.
Two mechanical gear stages.

Flaws:

Batteries are weak: 2 pcs. 1.5 Ah each.
The backlight is poorly positioned.
Poor quality mounting of the battery on the handle.

conclusions

As you can see, the high cost of brushless screwdrivers is easily outweighed by the advantages of the technology. The higher the requirements for a tool, the more reasons there are in favor of a brushless tool. Maybe the price is high for home use, but for a professional the choice is obvious.

Not all work around the house or on a summer cottage, performed with a screwdriver by a home craftsman, has comfortable conditions for their implementation. Certain difficulties arise with tasks that have to be performed at some distance from the power supply point. Extension cords come to the rescue; many craftsmen extend the power cable of the instrument. In this case, it is much easier to use a screwdriver powered by rechargeable batteries. ChudoVanna will tell you how to choose a cordless screwdriver.

Advantages and disadvantages of a cordless screwdriver

A cordless screwdriver is one of the most popular tools used in everyday life.

Advantages of the tool:

Mobility and convenience when working in hard-to-reach places.

Safety during work. When stretching a long network cable to a certain height, there is a risk of getting tangled in the wire.

No interference in the form of a stretched cable for others.

Work will not be interrupted suddenly due to a power outage or a plug being accidentally pulled out of the socket.

There is no need to purchase additional extension cords or carriers.

High voltage is not used during operation, which increases safety when working in wet rooms or outdoor conditions.

Independence from external power source. Particularly relevant for suburban buildings and new buildings.

The battery makes the tool balanced.

Compared to the network model, the device has softer and more precise adjustment of operating modes. Operating at low currents ensures a smoother transition from one mode to another, which protects fastener notches from damage.

Disadvantages of cordless screwdrivers:

Increasing the dimensions of the tool.

The increase in weight, but the balanced arrangement of the battery packs makes this disadvantage hardly noticeable.

The need to periodically recharge the battery. (Some models come with two batteries.)

Operating at low temperatures quickly damages most models.

Long-term storage reduces battery charge.

Higher price than a corded screwdriver.

How to choose a cordless screwdriver for your home, depending on its types and their characteristics

To decide which cordless screwdriver is best for you, you need to know in advance exactly what its loads and operating conditions will be. Only after this can you make a purchase by selecting a model that meets your specific needs.

One-time household work can be done using a household screwdriver, and if you plan to carry out DIY repairs or construction on a summer cottage, it is advisable to purchase a professional or semi-professional model.

A professional tool is made from higher quality materials, which increase its performance characteristics; it is able to cope with a large volume of work without harm to the engine and other components.

Types of batteries used

Cordless screwdriver models are equipped with one of three types of batteries:

Nickel metal hydride.

Each battery has its own advantages and disadvantages, so a cordless screwdriver must be selected primarily taking them into account.

Nickel-cadmium batteries

This type of battery requires compliance with the discharge regime. It is necessary to charge the battery only after it is completely discharged. Otherwise, crystals form on the plates of the device, which lead to improper operation of the device, and over time completely damage the battery.

Under proper operating conditions (full discharge and emptying), the batteries will last a long time. Their advantages:

Relatively fast charging;

The charge capacity is almost unchanged when the external temperature drops; they can provide operation at t -15 °C;

Low price compared to other types.

The batteries are designed for 1.5 thousand charging cycles. Shelf life – 5 years.

The disadvantage of nickel-cadmium batteries is their rapid self-discharge. If the device has not been used for some time, it must be fully recharged.

Nickel metal hydride batteries

The battery is designed for 1 thousand charging cycles. Compared to its predecessors - nickel-cadmium batteries, this type has advantages:

Higher (30%) specific capacity;

Greater resistance to mechanical damage.

Disadvantages of the device in comparison with its predecessor:

Daily charge loss – 1%;

Requires longer charging time;

Sensitivity to deep discharge;

Lithium-ion and lithium-polymer batteries

A cordless screwdriver with lithium batteries is the best choice for both professionals and amateurs. Strengths of lithium-ion batteries:

Light weight and compact;

Low degree of self-discharge;

Lack of “memory effect” (“memory effect” - a decrease in battery capacity after several tens of charging cycles);

The highest charge density per unit mass compared to other types.

Manufacturing companies use various lithium battery manufacturing technologies. Depending on the technology, batteries have different properties. For example, Makita integrates a chip into each battery that controls temperature, period of use and charge level. This automatically ensures the best charging mode, allowing you to fully charge the device within half an hour or an hour. And Hitachi uses technologies that allow the device to be fully charged in just 30 minutes.

The disadvantages of lithium batteries include:

Sensitivity to low temperatures;

Relatively low service life;

Having decided on the type of batteries that will be equipped with the screwdriver, you should consider other important characteristics for the device.

Voltage

The battery voltage affects the power of the screwdriver. The higher the battery voltage, the higher the power of the tool. The equipment offered by manufacturers has batteries with voltages of 9 V, 12 V, 18 V, 24 V, 36 V. The battery power corresponds to the energy consumed by the screwdriver motor.

The 9V tool is portable and intended for occasional use. If you need to choose a cordless screwdriver for home and household use with light loads, your needs will be satisfied by models with a voltage of 12 V. A tool with a voltage of 18 V and higher is classified as professional equipment used in energy-intensive work.

Torque

One of the main characteristics of screwdrivers, indicating the maximum rotational force of the shaft (spindle). The speed of screwing in the fastener, its maximum length and diameter depend on it. An average level tool for a home craftsman has an indicator of 16-25 Nm. A professional tool has a rating of 40-60 Nm, some models have a rating of up to 150 Nm.

In battery-powered models, the torque depends on the battery charge. If the screwdriver battery is partially discharged, the torque may be reduced by up to 30%. Over time, nickel-cadmium and nickel-metal hydride batteries no longer produce the original current and voltage, which also affects the torque drop.

Speed

The indicator depends on the screwdriver gearbox and is important for performing certain jobs. Household models usually have a two-speed mode of 500 rpm and 1200 rpm. At low speed, screw in the fasteners and drill large-diameter holes in brittle and soft material (for example, a hole for a socket box in drywall). Drill small holes into hard material at high speed. The speed of a professional tool is more than 2 thousand rpm, reaching 4-6 thousand rpm.

Basic parameters when choosing a cordless screwdriver

The main characteristics of the tool that you should focus on before finally choosing a cordless screwdriver:

Battery type and capacity;

You should pay attention to the design features and additional equipment:

Presence of speed switch;

Chuck type (quick-clamp or jaw);

Availability of illumination of the working area;

Availability of a container for bits or a magnetic holder;

Number of batteries included.

Top 10 best cordless screwdrivers

Leading models with batteries up to 10.8 V

Leading models with batteries up to 12 V

	AEG BS 12G2 LI-152C The screwdriver is from German developers, has 24 torque values, metal gears. Disadvantages: no residual charge indicator or backlight, non-removable cartridge.
	Makita 6271 DWAE The optimal solution from Japanese developers for professionals at an affordable price. 16 stages of torque adjustment, electronic brake, battery charging in 45 minutes. Disadvantages: small case capacity.
	Milwaukee M12 CDD-202C A professional screwdriver from American developers, its drive and battery are protected from overload by an electronic system. Able to work at t - 20°C. Disadvantages: high price.

Leading models with batteries up to 14.4 V

	Bison ZDA-14.4-2 KIN20 Domestic budget option for household needs. The batteries allow operation at sub-zero temperatures. Good ergonomics, electronic brake, backlight. Disadvantages: low engine speed, battery “memory”.
	Metabo BS 14.4 Li 2.0Ah x 2 Case A Japanese instrument that is suitable for home needs and professional activities, convenient lighting. The batteries are equipped with residual charge indicators. Disadvantages: low quality cartridge, too wide engine cooling slots.
	Bosch GSR 1440-Li The German screwdriver is distinguished by high reliability, power and fast charging. Low noise level, low weight (1.3 kg). Disadvantages: lack of LED backlight, minimum torque is too high.

Leading models with 18 V battery

And other entries from the DIY bathroom renovation section

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Analyzing: which screwdriver to choose

A screwdriver today has gained fame as a rather practical tool, which is why many home craftsmen can see its presence. If we talk about professionals whose activities are inextricably linked with solving many construction problems, then they cannot do without a screwdriver.

Why is the presented tool so convenient? Let's figure it out.

So, firstly, a screwdriver is an indispensable assistant when it is necessary to screw in and unscrew a large number of screws, bolts, self-tapping screws (for example, to assemble a wardrobe), and for the convenience of the user, the clamping force of the fasteners can be strictly limited. Secondly, a screwdriver can also drill various types of materials. Well, if you take into account the ability to carry out work in places without electricity, then it becomes clear that a screwdriver is an irreplaceable thing. In view of all of the above, it can be noted that the question of which screwdriver to choose worries a large number of consumers. Let's discuss this.

Screwdriver power characteristics

To begin with, it should be noted that all screwdrivers can be divided into two main groups: networked (operating from the electrical network) and battery-powered. In the first case, the design of the tool provides for the presence of a conversion transformer, which significantly increases the weight of the screwdriver, at the same time, connecting to the electrical network allows you to carry out work without time restrictions (convenient when working with the tool within the same room).

While cordless screwdrivers are famous for the fact that they can be used to work in all places that do not have electrical wiring. Naturally, the operating life of such devices has limited performance and directly depends on the type of batteries used. Such tools are simply irreplaceable when finishing facades.

If we consider the types of batteries that can be used in modern screwdrivers, we can highlight the following:

lithium-ion (Li-Ion) (provide more than 1000 charge-discharge cycles);
nickel-metal hydride (Ni-MH) (provide 500 charge-discharge cycles);
nickel-cadmium (Ni-Cd) (provide 1000 charge-discharge cycles).

The last two types of the listed devices are distinguished by their ability to operate at low temperatures and relatively low cost. However, their significant drawback is the “memory effect”, which requires the user to fully discharge and fully charge them during operation. Failure to comply with this condition will lead to premature loss of capacity of these elements.

Whereas lithium-ion batteries do not have this disadvantage and can be used in any mode without problems. Their disadvantages include higher cost and loss of capacity when used in the subzero temperature range.

When choosing a cordless screwdriver, it is advisable to take care of the availability of a replaceable battery, which will make it possible to eliminate downtime during operation by using and accordingly recharging alternately the replaceable and main batteries. Also, the presence of two batteries will increase the operating time of the device (especially important for non-electrified objects).

Screwdriver speed and torque

To understand this issue in more detail, you should decide on the type of screwdriver - whether it will be a professional or a household tool. This depends primarily on the scope of the expected work for which the screwdriver is designed.

So, if you need to use the device for a short time (at home), the household option will come in handy. If you plan to use a screwdriver every day (in professional activities), then a professional screwdriver should be your mandatory choice. Although it is more expensive, its ability to withstand continuous high loads and a wider range of options allow it to be used to solve many production problems.

Therefore, in household screwdrivers, the rotation speed will be 350-500 rpm, but as for the torque, you can stop at 20 N/m. These criteria will be sufficient for screwing and unscrewing screws even into hard materials.

As for screwdrivers for professional activities, these data should have the following values: 1200 rpm and 80-100 N/m. This arrangement will allow the product to be used not only for its intended purpose, but also to drill and even perforate materials.

Power modules for screwdrivers

Considering that the main working mechanism of any screwdriver is its engine, then before choosing a screwdriver, it is advisable to pay attention to its features. Today, screwdrivers can use two types of motors: brushless and commutator (with brushes). Moreover, the first of them are more expensive elements, but do not require maintenance, and function silently and smoothly. Whereas the second version of the product involves periodic revision of the commutator-brush assembly, therefore, when choosing a screwdriver equipped with just such a module, it is advisable to ensure that there is unhindered access to the device.

Screwdriver ergonomics

Considering the fact that a screwdriver is considered a device for long-term use, its ergonomics play an important role. That is, the tool should fit well in the hand (without slipping) and be comfortable to hold. An excellent option would be a screwdriver design where its center of gravity is located in the central part of the handle.

Additional screwdriver options

Of course, for optimal operation of a screwdriver, in addition to the main characteristics, it is advisable to pay attention to the accompanying capabilities.

So, first you need to pay attention to the possibility of adjusting the parameters:

Chuck rotation speed (allows you to perform various types of work (twisting, drilling));
Transmitted force (helps limit the applied torque).

Also a good function of the screwdriver is the indication of the battery charge level and illumination of the work area.

When choosing a screwdriver, you should pay attention to the following accessories:

Portable case (case);
Additional battery (By the way, read about how to charge it correctly here);
Charger
Set of bits and heads.

Well, that's probably all. We hope that this material will be a good help for you in the question of which screwdriver to choose with your own hands.

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How to choose a cordless screwdriver: learning to make the right choice

It's no secret that purchasing any construction tool, including a cordless screwdriver, is a crucial moment. Therefore, before going to the store, each of us has one single question: how to choose the right screwdriver?

Advantages and disadvantages of a cordless screwdriver

First, let's define the tasks that need to be solved during the repair process. It must be remembered that a multifunctional household screwdriver is not much cheaper than a professional one. The main difference is only that a professional tool can withstand heavy loads, without requiring careful treatment, since it is made of expensive, more resistant materials. Some technical data sheets even say that this screwdriver does not lose functionality when dropped from a height.

In a word, it is more adapted to work in “Spartan” conditions. Another advantage of a professional tool is the minimum number of bells and whistles, thanks to which it breaks much less often than household ones, which can do almost everything - twist screws, plan wood, work with a jigsaw, and double as a drill.

Therefore, when choosing a cordless screwdriver, you must remember that even in the conditions of ordinary apartment renovation, a household tool is used less intensively than a professional one.

Characteristics and functionality of screwdrivers

Among the most important characteristics is the rotation speed of the cartridge. For household models, it is, of course, lower and amounts to 500 rpm. While for professional screwdrivers it reaches 1500 rpm. An important characteristic is torque, which shows what density of material a particular tool can work with. The more torque a screwdriver has, the denser the material it can process.

In other words, torque measures the force that a given tool must overcome to produce rotary motion in a given environment. For household screwdrivers it is no more than 15Nm, and for professional screwdrivers it reaches 130Nm. For convenience and simplicity, some models are equipped with electronic speed controllers.

Which cordless screwdriver should you choose? When answering this question, it is very important to correctly determine the type of battery. To do this, let's look at some types and types of batteries that screwdrivers operate on. All models are equipped with batteries with voltages from 7.2 to 36 Volts.

lithium-ion;
nickel metal hydride;
nickel-cadmium.

Each battery has its pros and cons. Lithium-ion ones have light weight and high performance, charge quickly, nickel-cadmium ones can be charged many times, but they weigh a lot and pollute the environment, nickel-metal hydride ones weigh less than nickel-cadmium ones, are environmentally friendly, but do not allow working in the cold and have a small number of recharging times. Therefore, paying attention to the battery, choose the model that charges quickly (from half an hour to an hour). These are usually screwdrivers with lithium-ion batteries.

Choosing a screwdriver for the home

So, how can we choose a screwdriver and not throw money away? There is no exact recipe, but there is a certain scope of work that you need to do.

Let's pay attention to the engine. We prefer the brushless model, since such a motor runs smoothly and quietly, is easy to maintain, and has a long service life. If you still choose a motor with brushes, see if it is possible to get to them without the help of a specialist. This is important because it will allow you to avoid running to a service center to have them cleaned.
The cartridge also matters. They are divided, as a rule, into two types - a three-jaw (quick-release) chuck and a hexagonal chuck with a ¼-inch shank. Which cartridge is more convenient, everyone decides for himself. Some will like the quick-release one, while others will want to choose the latter because it is more convenient when replacing them. One thing is for sure - the larger the diameter of the chuck, the more versatile the screwdriver.
Number of revolutions per minute. If you are planning to build a couple of cabinets or make a wall with your own hands, 500 rpm is quite enough. But then you won't be able to use the screwdriver as a drill. If you plan to use the device not only as a screwdriver, choose a model with 1200 - 1300 rpm. True, such a model will cost an order of magnitude more.

The Internet allows you to find a large number of videos on how to choose the right cordless screwdriver.

You should not neglect them, since such videos usually tell in detail and clearly show how one or another model differs from each other, and which one is better to use for certain types of work.