How To Choose The Right Cordless Screwdriver

Cordless screwdriver Makita 8281DWPE

The tool is powered by a new generation Li-Ion battery with a voltage of 14.4 V, which is undoubtedly its advantage.

The instrument is supplied with 2 rechargeable batteries and a charger that restores the instrument to function in just one hour. The rotational speed of the screwdriver is divided into 2 ranges: the first range of speeds includes values ​​of the rotational speed from 0 to 400 rpm, and the second range from 0 to 1300 rpm.

The screwdriver is equipped with a keyless chuck (10 mm), equipped with 16 degrees of torque setting (maximum value 36 Nm), and all tools are 1.7 kg. In addition to standard operations, the tool is equipped with a strike option, and is able to perform from 0 to 18 thousand beats per minute.

The disadvantages of the tool include the following:

• For a tool equipped with an impact function, the manufacturer supplied it with a rather weak chuck
• Low battery capacity (only 1.3 Ah), which is not enough for intensive work
• There is a possibility that the hand may overlap the ventilation openings for cooling the motor during impact operation, and the ventilation openings are so poorly positioned that they will necessarily overlap in the case of wide palms of the user
• Screwdriver gearbox housing, equipped with an impact function, preferably made of metal.

How to choose the right cordless screwdriver

After considering the main parameters of universal cordless tools, we will dwell in more detail on the choice of a cordless screwdriver, and consider the parameters that will allow you to use the tool Not only at home, but also for commercial purposes.

Our consideration should be limited to products equipped with NiCd rechargeable batteries, which are currently in great demand, since, despite all their advantages, Li-Ion rechargeable batteries, due to their high cost, are NOT particularly popular. The main parameters that you should pay attention to when choosing a tool are:

• Completion of the tool with 2 batteries with a voltage value of at least 12V
• Availability of a charger capable of restoring the performance of the model in 1 hour
• Equipping the tool with a large number of stages (tightening forces) by means of which the frequency of the torque is adjusted
• High torque value
• The type of chuck with which the tool is equipped
• Multiple rotation speeds

It is recommended that you carefully read the warranty card, as some manufacturers DO NOT provide warranty for batteries. It is desirable that additional equipment includes a set of attachments, 3 rechargeable batteries and a flashlight.

Armed with all the necessary knowledge, we will appreciate the advantages and disadvantages of the following models of famous brands:

• Cordless screwdriver Makita 8281DWPE, the price of which is 5.8 thousand rubles and equipped with a Li-Ion battery and impact options.
• Hitachi DS12DVF3 cordless screwdriver equipped with flashlights.
• Cordless screwdriver BOSCH GSR 12-2 Professional.
• Cordless screwdriver METABO BSZ 14.4 Impuls, costing from 7 thousand rubles and having a rather rare option “impulse”

Unfortunately, due to the exchange rate, the cost has become irrelevant and is indicative

Of course, all the instruments selected for consideration are of high quality, reliability and durability. Although all of the above screwdrivers belong to the category of professional tools, at a cost they are quite affordable for an ordinary user, now we will understand in more detail the characteristics and decide which one to choose.

Choosing a cordless screwdriver

How to choose the right cordless screwdriver.

Therefore, the user needs to keep in mind that when choosing a universal tool, he deliberately allows the Averaging of Certain characteristics, according to which the quality of the tool is assessed, for example, the drilling speed or the impact force. over, some characteristics of the tool become simply incompatible, for example, hammer drilling and small hole drilling. But the user enjoys all the advantages inherent in universality such as:

• Battery powered tool provides autonomy from household power
• The multifunctionality of the tool provides a wide range of possibilities for its application
• Simplicity and precision of work

And this is a far from complete list of the capabilities of universal tools. Currently, manufacturers offer a wide range of different models of cordless universal tools such as screwdrivers, grinders, planers, and more. In the present, there is a tendency to replace the usual network tools with battery tools, and not only in everyday life, but also in production and industry. In the article, Given the relevance of the issue, the correct choice of tool, the characteristics and parameters of cordless screwdrivers are discussed in detail.

Rechargeable universal tool. Advantages and disadvantages

It is quite obvious that the optimal choice of a tool is primarily determined by the tasks, the solution of which the tool must provide, and, of course, by the conditions of its future operation (operation in domestic conditions or solving professional problems). A clear understanding of future operating conditions is all the more important when you consider that the cost of multifunctional household tools does not differ much from the cost of professional cordless screwdrivers. It is quite logical that the question arises. How does a professional tool differ from household models? The main difference is that a professional screwdriver is able to withstand longer loads and less gentle handling.

It is these parameters that distinguish a professional model from a simple one, and therefore many manufacturers in technical data sheets indicate that their product does NOT lose its performance after falling from a certain height. It should also be taken into account that even under repair conditions, tools intended for domestic needs are used less intensively than in production conditions. However, such a high resource of strength and reliability is ensured by functionality. It is for this reason that a professional tool is less functional than a household one.

For a clearer understanding of the essence of the issue, it is necessary to analyze the situation by considering a specific example. Suppose that a batch of QUATTRO universal cordless screwdrivers arrives at some furniture shop, each of which is 4 screwdrivers in one Black brand Decker KC2002FK.

On a superficial examination, it seems that the furniture industry has been equipped with excellent appliances produced by a well-known brand, and at the same time saved quite a decent amount of money (the cost of a set is 6000, while a separate tool is NOT much cheaper). But this judgment is rather superficial. Let’s consider the question more thoroughly. In production, almost always during a working day, you have to perform the same type of operations or plan a tree, or engage in the installation of finished products or solve packaging issues. It is not hard to guess that only one tool is required to perform THESE functions of the same type (for example, a jigsaw, a plane, a screwdriver, etc.). Everything will become clear if we compare the characteristics of the screwdriver with the Black nozzles Decker KC2002FK and individual tool characteristics. Choose this versatile cordless screwdriver for those who do not need to use individual components so often, and this tool itself.

For greater clarity, it makes sense to consider the products of the same brand, namely the Black screwdriver Decker CP12K, the cost of which is 3.5 thousand rubles. The KC2002FK screwdriver uses a battery with a capacity of 1.5 Ampere / hour and a voltage of 14.4 V, while in a not very universal model, a battery with a capacity of 1.5 A / hour and a voltage of 12 V is used, but the value of its torque is 16 Nm, and in a more powerful universal screwdriver only 10.5 Nm. The first significant sacrifice for instrument versatility.

The universal tool can also be used as a jigsaw, to which, of course, there is no point in making special requirements. The jigsaw of the same KS999EK company has a power of 600 W, and the adjustable frequency of the blade moves varies from 0 to 3200 strokes / min.

The nozzle of the universal device demonstrates the same stroke rate (3000 strokes / min), but with its help you can cut material to a depth of 38 mm, and with a specialized jigsaw, wood is cut up to 65 mm.

Who should choose this instance? Universal screwdriver with Black bits Decker KC2002FK is the ideal tool for home use, where it is used only when necessary, that is, quite rarely. Its use in production only makes any sense, and therefore in a professional environment, specialized tools equipped with the same type of battery packs and performing strictly defined, standard functions have become widespread.

Overview of professional screwdrivers

A rational approach that allows you to save money was demonstrated by BOSCH, which released a model line of tools powered by a battery of a GSR 18 VE-2-LI Professional screwdriver. It should be noted that the cost savings are quite significant considering the high cost of a modern Li-Ion battery. Thus, by purchasing an additional tool from this company, there is no longer any need to purchase a battery.

Cordless screwdriver Hitachi DS12DVF3

The instrument is made with a somewhat exotic appearance. This design is not accidental. Firstly, it is simply not economically feasible to forge a tool body, and, secondly, exotic linings protect the tool from falling. In addition, the pads also provide the necessary ergonomics for the screwdriver handle (the user’s hand is protected from vibrations and DOES NOT sweat during intensive work).

The scope of delivery of the screwdriver includes a flashlight, a charger that restores the product to work in 1 hour and a 1.4 Ah battery.

The screwdriver has 2 speed ranges: the first range of speeds includes the speed values ​​from 0 to 300 rpm, and the second range from 0 to 1100 rpm.

The screwdriver is equipped with a keyless chuck (10 mm) and 22 degrees of torque setting.

When choosing, pay attention to the main disadvantages of the tool:

• An outdated, albeit very reliable drill chuck
• Unsuccessful attachment of the removable bit to the bracket (the broken one often clings to clothing)
• Small size of the reverse button, although its location is convenient for the user

Choosing a screwdriver

In this article, we would like to touch on the topic of choosing a screwdriver, take a closer look at their types and, of course, technical characteristics that you should pay attention to when buying this type of tool in order to expand to answer a question that has recently arisen more often, namely. How to choose a screwdriver for home, cottage or work.

Applications of the screwdriver

• Tightening / unscrewing screws, screws, bolts and other fasteners;
• Drilling holes in wood, metal and brick.

• Stirring building mixtures and paints;
• Drilling holes for winter ice fishing.

There are a huge number of screwdrivers on the market, different in parameters and manufacturers. They are subdivided into professional and household, depending on the nutrient, cartridge size, power, a number of additional functions, delivery set and price. This division, however, is inherent in almost any instrument.

To begin with, let’s analyze the division according to the nutrient. Two types can be distinguished: rechargeable (Li-Ion, Ni-Cd, Ni-Mh) and electric, in each of them we will talk in more detail below.

The most modern and most common type of rechargeable batteries today, not only in screwdrivers, but also in many other tools (as well as in portable devices, which we all use). Modern Li-Ion batteries are designed for three thousand charge-discharge cycles. The rechargeable battery is lightweight and fast enough to charge; moreover, it has no memory to charge.

The main disadvantages are: battery shelf life, which is three years, the need for constant use to get the most out of it and significant cost.

They appeared on the market for a long time, they are used in many tools, and not only in screwdrivers. Designed for one and a half thousand charge-discharge cycles. The shelf life of such batteries is five years, there is also the possibility of working in the cold, at temperatures up to 15 degrees and it is very important for the average buyer, the lowest price of all types of batteries.

The negative aspects of this type of battery are a rather long, in time, charging process (at best, it is time), the presence of memory for a charge and a significant weight of the battery.

At its core, it is a cross between Li-Ion and Ni-Cd batteries. Found in screwdrivers much less frequently than the types of batteries described above. The number of charge-discharge cycles varies about a thousand. It has practically no memory to charge, and has the lowest self-discharge among all types of batteries. Of the minuses It is impossible not to note the weight.

All batteries differ in capacity and battery voltage.

Capacity is measured in amperes times time (Ah). The higher this indicator, the more the battery is capable of carrying a charge, respectively, more work will be done on a fully charged battery.

The battery voltage is measured in V (Volts). The power that can be obtained from a screwdriver operating on THESE batteries depends on this indicator. Simply put, battery voltage directly affects the maximum possible performance of soft and hard torque, which we will discuss below.

Very similar to drills (don’t miss also the article “How to choose a drill”), the main difference is the torque control. Models of this type of screwdriver are represented by only a few manufacturers of household tools. Renowned manufacturers focus on professional drywall screwdrivers, the cartridge of which begins to rotate the bit only after “drowning” it into the material.

Corded screwdrivers are suitable for one-time work around the house or for professional use in repair and construction. Based on the situation, the absence of the need for charging can be considered a plus. Constraints created by the need for an electrical network, low mobility and tangled wires are definitely the main disadvantages of this tool.

Chucks and reducers

Screwdrivers come with either a quick-release three-jaw chuck (clamping range of the tooling from 0.5 to 13 mm), and with a hexagonal tool seat with a 1/4 inch shank. The keyless chuck is more practical and allows you to use any tool of a suitable diameter. Of course, the larger the chuck diameter, the more versatile the screwdriver is.

The hexagonal chuck is convenient for frequent tool changes and when working in hard-to-reach places. For drilling with such a screwdriver, you must use drills with a hex shank. Can be fitted with a conventional chuck with a hex shank.

Rotation from the engine to the chuck is transmitted through a gearbox. The gears inside the gearbox can be made of metal or plastic. Metal gears Most typical for powerful professional screwdrivers.

They reflect two parameters, measured in Nm (Newtonometers), these are soft and hard torques:

• Soft torque is an indicator of the maximum force of a screwdriver in terms of twisting / unscrewing, the rotational speed in this mode for most screwdrivers varies from 0 to 350 rpm.
• Hard torque, in turn, reflects the maximum force in the drilling mode, in this case, the rotational speed is usually calculated from 0 to 1000 or more rpm.

The more these parameters are, the more powerful, productive and practical the screwdriver is. For example, a screwdriver with a torque of 25 to 30 Nm can easily screw a self-tapping screw up to 70 mm long into a tree. To tighten self-tapping screws from 70 to 100 mm, a torque of 40 Nm is required. Longer self-tapping screws require pre-drilling the hole.

Additional features of some screwdrivers:

• The presence of the hammer mechanism is undoubtedly quite a useful function, especially when working with socket heads or when drilling holes in brick and stone.
• The presence of an impulse, periodically increased torque, is useful for easier drowning of fasteners into the material, when unscrewing a stuck self-tapping screw, or even brown, if the hammer drill does not cope. Especially useful when there is no way to rest against to firmly press the screwdriver.
• The presence of 3 speeds will allow you to fully replace the mains drill at home, since the rotation speed of the chuck in this mode can be more than 3000 rpm, and the first speed will give out a decent torque.
• The presence of backlighting is very important when working in hard-to-reach places or with poor, or even completely absent lighting. The most successful version of the location of the backlight above the battery pack, there are models with a backlight located above the start button, which is less effective in most cases.

Summarizing all of the above, I would like to note that it is impossible to advise a universal screwdriver for everyone, because many components of the choice depend on your goals and objectives, which you are going to implement with this tool, but finally, I will still share my opinion about the choice on some examples.

Home / cottage screwdriver

For the most part, the network version will be sufficient, due to the availability, light weight and lack of the need for special mobility. If we consider rechargeable versions, then it’s worth Pay attention to Ni-Cd and Ni-Mh, if you do not plan to use them often, this will save you money and get a longer battery life.

In cases where frequent use is planned, requiring the continuity of the working process, there is no doubt that choosing a Li-Ion battery will justify itself 100%. Why don’t I advise taking more modern batteries for rare jobs? Everything is very simple, they are more expensive and are designed for stable use, do not forget that their shelf life is 2 years less, and then, in this case, there will be much more missed opportunities.

For home needs, the maximum torque of 25-35 Nm will be quite enough, of course you can take a more powerful one, it all depends on your desire and financial capabilities. The capacity of the battery is not important for centuries for periodic use at home, therefore 1.5-2 Ah will be just right.

Professional screwdriver

When working in hard-to-reach places, it will be logical to choose a more compact model. The peculiarities of frequent and long-term continuous use in many cases justifiably lead to the purchase of a Li-Ion screwdriver with a maximum torque of 40 Nm and more, depending on the type of materials with which to work in the future.

Li-Ion batteries, in this case, are relevant due to the continuity of the working process, provided by fast charging of batteries, and they are simply lighter, which matters for your hand during prolonged use.

The choice of additional features of the screwdriver directly depends on your needs. Try to clearly define for what needs you will use it, decide on a budget. Last but not least, the availability of second tools, like a drill or a hammer drill, with rare use, these moments will allow you to weed out unnecessary functions and highlight the clearly needed ones.

In conclusion, I would like to note that the screwdriver market is full of various variations and choosing exactly what suits you: it will not be difficult. We hope we were able to help you decide on the choice of a screwdriver. We wish you the maximum return from the instrument and more positive emotions.!

How to choose the right screwdriver?

Screwdriver. It is a power tool designed for screwing in and out (twisting / unscrewing) screws, screws and self-tapping screws. The modern Ukrainian market is literally replete with a wide variety of models, with a different set of functions and unique technical characteristics. The choice is quite large, and choosing the appropriate model is not always easy. To make your task much easier, we will list the most important things that you should pay attention to.

First of all, decide on the conditions and complexity of the upcoming work. What loads will this tool be subjected to? What materials and fasteners do you plan to work with most often? How long will the work be? Do you need a drill function? Is it convenient to work with the network tool? By answering these questions, you will be able to determine which functions and values ​​you need in a screwdriver.

Varieties of screwdrivers

Screwdrivers are primarily divided by the type of power source. The cordless tool is convenient to use due to its independence from wires, which will become an obstacle in a confined space (the cord can cling to furniture, get tangled in the legs, bend, twist) Such a screwdriver often comes with a drilling function, which is a big plus for repair or finishing work. The power of the battery will be enough for the wave for periodic work for several hours a day, and modern chargers will recharge it in just an hour. Pay attention to the network type of the instrument during serial use. Such screwdrivers work with a constant power, which is often more than in cordless ones, and it will weigh less and cost less.

The following should be noted. This is the use of a tool like a drill. Not every screwdriver has a drilling function. Almost all network models lack it.

Important specifications

Torque (Nm). The performance of the tool will directly depend on this value as a screwdriver. The more torque, the more difficult tasks the tool will be able to overcome. Cope with screws with a larger diameter, and also allows you to screw fasteners into a denser material.

Rotation speed (rpm). This is the “speed” of the tool spindle. The performance of the drill function with a power tool depends on it. Adjustable dosing force when you press the power button. There are models with two and three speeds, in this case the adjustment will take place using a special switch.

Power. The efficiency of the power tool depends on this characteristic. If we are dealing with corded screwdrivers, then there is a direct dependence on the motor power and energy consumption. In cordless tools, the battery voltage plays a major role. Accordingly, the larger it is. The more powerful the screwdriver will be.

Battery capacity (Ah). This characteristic is responsible for the time of use of the tool. The larger the capacity, the longer the cordless tool will run smoothly. Drills are often equipped with two batteries at once.

The type of charger depends on the type of battery. For Li-ion (lithium. Ion) batteries, pulse chargers are ideal. They ensure that the battery is fully charged over time. For Ni-Cd (nickel. Cadmium) and Ni-MH (nickel. Metal. Hybrid) batteries, ordinary chargers are used, which, in turn, are divided into slow (from 14 to 16 hours), Fast (from 3 up to 6 hours) and high-speed charge (1 hour).

Reverse. Spindle rotation in the opposite direction. The presence of this function is necessary for unscrewing fasteners and removing the drill from the material.

Weight. Of course, working with a light tool is much more pleasant than with a heavy one. And it’s just great that today there are many powerful low-mass models. It is extremely important for any manufacturer that the power tool is in demand, and for this it must be comfortable in work. Minimum weight. A sign of a household class of devices. This is due to the small size of the motor and battery. Therefore, it is unlikely that it will be very powerful. It is worth thinking about this before buying.

Expendable materials

Much also depends on the tooling of the screwdriver.

Bit. The main nozzle for a screwdriver, which serves directly for screwing and unscrewing (twisting / unscrewing) screws. Bits come in a wide variety of sizes and types. They should be chosen depending on the type of fastener and the material in which it is wrapped. Pay attention to the material of manufacture of the equipment itself. The right combination of type, alloy and coating of the bit will make your work much easier.

Drill. Drill-driver accessories designed to create holes of different diameters. If your tool is NOT equipped with an impact function, it will not cope with drilling in concrete or masonry.

Batteries. Batteries are required for any cordless tool. They also come in several types and differ in their characteristics and cost. There are three types of batteries. Ni-Cd, Ni-MH, Li-Ion. Recently, the latter has become increasingly popular in almost any cordless power tool.

Additional and protective equipment. As you know, safety comes first. A variety of protective accessories will help you with this. Glasses, ear plugs, gloves, overalls and shoes Designed and designed specifically for craftsmen and will be very useful in working with any power tool.

Basic safety rules

Departing a little from the topic of choice, we advise you to remember that any power tool can be dangerous if it is used abnormally or if safety rules are ignored. Screwdriver. Not an exception. There have already been many accidents due to improper use of the screwdriver. For example, if you turn the screw at the wrong angle, your hand may break. As a result, both the body and the surface into which the fastener is wrapped and the tooling can be damaged.

Also, if it presses too hard on the screwdriver when the screw is tightened, the bit can come off it and, again, injure, for example, fingers. There were cases of lack of vigilance. A high-speed tool, with a weak hold, pulled out of the hands and injured its owner. Carefully read the instruction manual for the tool, especially if you are a beginner, try once again to get advice from professionals. These simple steps will ensure safety for you and your instrument.

In conclusion.

Thus, if you correctly evaluate the tasks and correlate the characteristics of the tool with them, the choice can be made quite easily. And if you have any questions, you can always ask them to our qualified sales consultants, who will provide all the necessary information for free and help you to choose one or another model of a screwdriver.

Charging methods without using a dedicated charger

If, for some reason, the memory from the set is out of order, you can use a third-party device.

In this case, it is important to take into account the characteristics of the battery when selecting such a charger. Voltage and capacity Must match. Otherwise, the battery could be damaged.

Interesting: The DF457DWE impact driver comes with 2 batteries. If one is discharged. You can just insert the second and continue working.

If there was NO charger at all, there are three alternative methods.

Car charger

It is not necessary to use this method all the time due to the mismatch of the parameters. A car charger is suitable if it is equipped with voltage and voltage adjustment elements. You just need to set the indicators correctly: the current is set as 0.5-0.1 of the total battery power.

Nuances of charging various types of batteries

Most of the features that need to be considered are described in the first section. Here. How long the power tool should be charged.

General rules for charging the battery

If everything is done properly, the battery will last a long time. Here are the basic principles for properly charging a screwdriver:

1. If the battery is being charged for the first time, it must be fully discharged before insertion and then fully charged.

2. The temperature in the room should be between 10 and 40 °.

3. To prevent the unit from overheating, it is necessary to disconnect the storage battery (accumulator) from the charger as soon as it is charged.

4. If the screwdriver is not used for a long time, it is necessary to recharge it once a month for preventive purposes.

How to properly charge a screwdriver battery: 3 best ways to charge

This article explains how best to handle the cordless screwdriver in terms of charging and storage. The manual also tells you how you can recharge the power tool without the supplied charger.

Checking the battery condition with a multimeter

A device like the STHT0-77364 can help you find faults in various electrical components, including screwdriver batteries. It is best paired with other testers to achieve reliability. This allows you to check the indicators and calculate the error.

Note: Before you start measuring, you need to make sure that the multimeter itself is working. To do this, you just need to connect it to an outlet along with another similar device and check the display.

Battery voltage and other parameters

The performance of the device depends on the supply voltage. Instruments equipped with batteries voltage 9. 36 W. The low voltage screwdriver is capable of small accomplishments. For example, screw a fiberboard sheet to a metal profile. Choose high voltage models if you need to do voluminous work. A device with a supply voltage of 13 to 16 W is quite suitable for home use.

Power sources are:

• Ni-Cd. Nickel-cadmium. You can make about 1000 charges. They also have a memory effect. When the battery capacity of the instrument decreases due to NOT being fully charged. A screwdriver with this type of battery ensures uninterrupted operation at low temperatures;
• Ni-MH. Nickel metal hydride. Capable of charging up to five hundred times. Also have a memory effect. This type of battery is NOT designed to operate in freezing weather;
• Li-Ion. Lithium-ion. The most emky kind of battery. over, they do not suffer from the memory effect, they are considered ecological. However, the device does NOT withstand subzero temperatures.

Torque

The indicator is measured in newtons per meter. For home use, minor repairs, a screwdriver with a torque of 10 to 15 Nm is suitable. To perform professional work, you will need a device that develops a torque of up to 130 Nm.

The indicator is easily adjusted using a special ring, which is located in the chuck.

A guide on how to choose the right screwdriver

Assemble the furniture, Unscrew the screw, screw on the baseboard using a simple screwdriver. Difficult task. These manipulations are much faster if used. Screwdriver. When a person decides to choose a device for working at home, he is faced with a problem. The market for construction tools is filled with models, which differ in capabilities and price.

• Kinds
• Mains or battery
• Brushless or brushless motor
• The difference between professional models and household
• Selection by technical characteristics
• Power
• Torque
• Manufacturer
• Battery voltage and other parameters
• Rotation frequency
• Cartridge
• Reverse
• Weight
• Additional features and capabilities
• Top 3 for home

Among the devices, there are two groups of screwdrivers:

• For professional work. The tool is able to withstand heavy loads. It is much more powerful because it has a lot of work done. Network screwdrivers are more expensive than household ones;
• Household. Designed for the same functions as the professional, but not able to handle the same load. Cordless screwdriver is suitable for home, summer cottages, furniture assembly.

First, decide on the purpose of using the device. If the task is to choose a tool for household chores, then take a closer look at household screwdrivers.

Additional features and capabilities

When choosing a device, pay attention to the position of the handle. There are models with an additional center handle. Such screwdrivers are more convenient, since they require less physical effort from a person. There are percussion devices, which can be used to drill brick, concrete. A special adjusting ring allows you to select the desired operating mode of the screwdriver.

The tool can be equipped with a function of stepless speed adjustment. In this case, the button is pressed gradually. For battery devices, there is an additional function to display the charging status. Expensive models include a second battery, a fast charger.

Brushless or brushless motor

When choosing a tool for the job, compare the main characteristics of the commutator and brushless screwdrivers:

• The productivity of tools with a brushless motor is one and a half times more. With equal capacity, batteries with a brushless motor will last longer, and not require additional recharging;
• The dimensions of the first are larger than the second.

Decide if you really need a brushless screwdriver for your home. Many people work with a device that was made in China, and do not complain about its effectiveness. The budget option manages to work off the money invested in it, Until it fails. Therefore, it does not cost to repair, it is easier to purchase an inexpensive screwdriver again, and work with a new tool. Everyone chooses independently.

Cartridge

This part of the device is important for the quality of the tool. There are two types of screwdriver chucks:

• Key. It is necessary to have a special key, through which the screwdriver nozzle is replaced;
• Keyless. This type allows you to instantly change attachments. In addition, nozzles of any thickness can be installed.

Keyless chucks are preferred by most buyers because they are easy to use and do not require special attachments to change the tool bit.