Using a brushed or brushless screwdriver is a dilemma for those who are renovating a home or workspace. The article discusses the operating principle of both types of tools, the difference between them, their strengths and weaknesses. Based on the comparative characteristics, it was concluded which screwdriver is more reliable.
Brush (left) and brushless tools
Differences between a brushless and brushed screwdriver
The design of a brushless screwdriver does not have a commutator unit with brushes, which is why these models are also called brushless. This unit consists of brushes that rub against the rotor and supply electricity to it. With their help, the windings are switched, creating a magnetic field that drives the motor rotor. The functions of the collector in a brushless tool are performed by an electronic unit in which switching occurs with the help of transistors and other elements.
By replacing the collector with an electronic board, manufacturers were able to eliminate some of the weaknesses of electric motors and increase efficiency. In this regard, it can be argued that brushless screwdrivers are superior to their brushed counterparts in almost all respects. However, there remain nuances that allow the latter the right to exist.
Device, pros and cons
Until recently, screwdrivers were classified only by mechanism (impact and non-impact) and by type of power supply (mains and battery). However, over the past decade, we have seen the emergence of tools equipped with brushless motors. Having analyzed these two types in detail, you can decide for yourself which screwdriver is better: brushed or brushless.
Brush screwdrivers
The first type works using a commutator motor. Electrical energy is converted into mechanical energy through the rotor. The rotor is wrapped in copper wires that carry electricity, creating a magnetic field that causes the armature to rotate.
Also in the commutator there are brushes responsible for transmitting voltage. They come into contact with the commutator, which changes the direction of rotation.
Pros of brush tools:
- Less weight and size of the screwdriver.
- Simplicity of design;
- The price is cheaper than its brushless counterpart.
Minuses:
- The efficiency is up to 60% - much lower than that of a brushless unit, which affects performance.
- Brushes wear out over time. The reason for this is, in particular, increased friction resulting from operation at higher speeds.
- The third point follows from the second point: friction wears off the brushes, creating dust, which leads to clogging of the commutator.
Brushless screwdrivers
Brushless tools have more advantages compared to their traditional counterparts:
- control of rotation speed and torque, selection of indicators for a specific surface and task;
- wear resistance due to the absence of brushes and commutator;
- high efficiency (90%), increased torque;
- economical battery consumption;
- the engine does not spark, therefore, the tool can be used near flammable substances;
- increasing the load does not reduce the rotation speed;
- reduced noise level.
The only disadvantage of a brushless screwdriver is its expensive cost.
Dimensions
The commutator unit is up to half the length of the rotor, therefore, a motor without brushes will be much smaller, while maintaining its power. At the same time, the difference in the weight of screwdrivers can reach several hundred grams. This feature will be appreciated by those who work with professional tools, when they have to screw in hundreds of screws every day. But for domestic needs this parameter may not be critical.
Also find out how to remove a screwdriver cartridge: https://myinstrumenty.ru/elektroinstrument/kak-snyat-patron-s-shurupoverta/
Additional functions
The screwdriver can be equipped with an impact function, which allows you to successfully drill concrete and brick. The pulse mode significantly increases torque, which makes it easier to unscrew problematic screws, for example, rusted ones.
Backlighting can come in very handy when doing work in dark areas.
The speed switch is important when the tool has to perform different functions. Drilling requires higher speed, and screwing screws requires lower speed.
The most advanced types have three speeds. There are models of professional screwdrivers that have the function of automatically feeding screws and self-tapping screws, which significantly speeds up the process of completing the work.
Resource
Brushes are, in fact, consumables, because during use they can wear out or burn out. Changing them is not difficult, especially since it is rarely necessary to do this. However, a brushless tool is completely devoid of this. Since there are no rubbing units in this tool, nothing will be erased. It turns out that a brushless screwdriver is not only safer, but also lasts longer.
Equipment
Like the types of screwdrivers, the equipment included with the tool can be different. In particular, the cost of a screwdriver also depends on this.
But it’s better to stick with the maximum configuration option. A replaceable battery will allow you not to be “idled” when the battery runs out at the most inopportune moment.
A variety of Phillips and regular bits will come in handy in a variety of situations.
Reliability
The design of the electric motor is quite simple, and if used in normal mode, it will last a very long time. the vulnerable point is the control unit, which is subject to the greatest wear. The collector unit is simple to implement and is not expensive, so you still need to try to disable it. But transistors can be damaged, for example, when working in an aggressive environment. At the same time, the rotor can “stick”, as a result of which there is a possibility that the winding will burn out. In this case, a good electronic unit will stop the supply of electricity, thereby protecting the tool. It is quite difficult to make an unambiguous conclusion which screwdriver is more reliable.
Rating of the best cordless professional screwdrivers top 10 as chosen by customers
A review of the best drills and screwdrivers begins with determining why the tool is needed. Some people need a portable station wagon, while others only need it for screws. For some craftsmen, mass is important - due to working on high ladders. For others - long-term operation without recharging. Many buyers make their choice through the online store. Some people tend to choose the cheapest ones, others – more expensive ones, but of better quality. And yet, everyone finds something to their liking. Choosing a screwdriver for most is almost an intimate matter, and this is not a joke.
It's quite easy to compare the top best deals from the most famous brands. To begin with, visit the nearest store or equipment market. After consulting with a consultant, you must not forget that each person sees the range of offers in his own way. Therefore, you can continue your search for top screwdrivers on the Internet.
Whether to choose dewalt dcd791d2 70 nm or the latest Interskol development is up to each potential buyer to decide. The rating of cordless screwdrivers can be compiled in different ways, but here is the optimum.
The rating of the best screwdrivers is based on the most common choice of certain models based on the ratio of a number of parameters. The main ones are price / power and mobility / functionality / size and weight / optionality of offers.
Screwdriver: krüger kd 18li
A screwdriver from the Kruger brand, specially made for loosening fasteners and drilling. They can perform the entire range of work on installing and removing fasteners.
Screwdriver: krüger kd 18li
Work can be done at one of two speeds. The first - with revolutions up to 1350 per minute - is ideal for drilling and ordinary fasteners. The second is up to 350 rpm, but with much more powerful torque - for working with tight fasteners.
The chuck is quick-clamping, type is three-jaw. The maximum shank diameter is 10 mm. For safety and certain types of work, a spindle movement blocking system is provided. Added reverse and ratchet - to work as a regular screwdriver.
Power supply – Li-Ion battery, voltage 18 V (V) and capacity 2 Ah. It provides long-term operation without the need for recharging.
Comfort of work is enhanced by LED backlighting and a wrist strap. The kit comes with 2 batteries and a set of attachments - drills and bits. Packaging – case. Mass (weight) of the tool – 2.1 kg.
Screwdriver: makita df457dwe
This colorful drill/driver from makita is designed for both professional and home use. The scope of work includes installation and removal of any fasteners, drilling and other similar operations with the appropriate attachment. You can choose a multifunctional assistant here.
Screwdriver: makita df457dwe
Mechanism type – shockless, with electronic overload protection. The work of the latter is to turn off the power to the motor when the spindle rotation suddenly stops. The latter can receive up to 1400 rpm. 2 speeds available. The commutator motor can be adjusted through 17 torque steps.
The chuck is of the quick-release type. The maximum clamping diameter of the shank is 13 mm. The largest drilling diameter when working with wood is 36 mm, with metal – 13 mm. The functionality has been expanded with a working depth regulator.
Power comes from lithium-ion batteries, of which there are 2 in the set. Voltage – 18 V, capacity – 1.5 Ah. Installation - classic slider, under the handle.
Tool weight – 1.7 kg. The weight of the entire set in the case is 4.37 kg. A minimum set of bits is also supplied (optional, to be specified).
Screwdriver: metabo bs 18 l
The metabo brand is rich in excellent models of screwdrivers - the next model confirms this with its build quality.
Screwdriver: metabo bs 18 l
The chuck is quick-release, no key is needed to change the attachment. The maximum diameter of the tail part of the nozzle is up to 13 mm. You can also drill, with a maximum drill diameter of 20 mm for lumber and 10 mm for metal. The screwing depth is adjustable.
The mechanism is shockless, develops up to 1800 rpm. The engine is a commutator, at 2 speeds. Maximum hard torque – 50 Nm.
Powered by 2 replaceable lithium-ion batteries. Each has a capacity of 2 Ah and a voltage of 18 V.
There is illumination of the working area. A hook is provided to free your hands - for hanging on a belt or belt. Small replacement bits and drill bits can be temporarily secured in a special compartment on the body. Ergonomics and style emphasize functionality, which is already enough for any operation.
Weight – 1.6 kg. Place the supplied tool kit in a suitcase.
Screwdriver: metabo bs 18 10mm
This screwdriver from metabo is characterized by increased power. The torque of 48 Nm ensures good performance with stuck fasteners.
Screwdriver: metabo bs 18 10mm
Installation of replaceable attachments is carried out in a quick-release chuck. It provides for the installation of both bits and drills with a shank diameter from 0.8 to 10.0 mm. In this case, the use of bits without a cartridge is possible in normal mode.
The model is non-impact, you can drill: metal – up to 10 mm in diameter, wood – up to 21 mm.
Electric motor – commutator, two-speed. Revolutions – up to 1600 per minute. Torque control in 20 steps.
Power is supplied by a lithium-ion battery, removable as a slider. Voltage – 18 V, capacity – 1.3 Ah. The kit contains 2 batteries at once.
It is distinguished by its small size - which provides access to limited and cramped spaces. There are depth and torque regulators. Illumination of the work area will help both in limited corners and at night. You can hang the tool on your belt - there is a hook for this.
The set comes in a plastic case equipped with a handle.
Screwovert: metabo bs 14 4 10mm
The metabo brand offers a very easy-to-use non-impact screwdriver. This professional screwdriver is not very expensive and is suitable for every craftsman.
Screwovert: metabo bs 14 4 10mm
Installing replaceable bits and drills into a quick-release chuck.
The commutator electric motor reaches speeds of up to 1500 per minute and operates at 2 speeds. The torque allows you to drill wood with a drill with a diameter of up to 20 mm, metal - up to 10 mm. Possibility of change - 20 steps. Electronic overload protection is installed.
Comfort of work is ensured by illumination of the working area and a socket for bits. Can be hung on a belt - by the hook. The depth of twisting is adjustable. Holding it in the hand is simple: the body is rubberized, and there are special pads on the handle. This also increases the impact resistance of the tool.
Power supply – Li-Ion battery. The capacity of each of the two in the set is 1.3 Ah. Voltage – 14.4 V. Charger included in delivery. The battery holds its charge for quite a long time.
Tool weight – 1.2 kg. The total weight of the set (including storage case) is 3.56 kg. Packed in a case. There are known production options in different cases.
Screwovert: bosch gsr 1800 li
This representative of the family of screwdrivers from Bosch is of a professional level. Intended for complex work and industrial use, in particular at heights. It is also similar to the very good bosch gsr 120 li, but there are differences.
Screwovert: bosch gsr 1800 li
Power allows you to get up to 1300 rpm, at 2 speeds. Torque is adjustable in 25 positions. The electric motor is commutator (brush). Spindle rotation is blocked.
Work with materials is carried out with a maximum drill diameter of up to 10 mm for metal, and up to 29 mm for wood. The chuck is a classic quick-release chuck.
Power supply is from an 18 V battery. Type is Li-Ion, which retains charge in frosty conditions. The capacity of each of the two in the set is 1.5 Ah. Full charging time is 30 minutes.
Overloads and overheating are monitored and suppressed by electronic units. There is no backlight. Tool weight – 1.4 kg. Easily stowed and transported in a case.
Advantages: long discharge period, high-quality ergonomics.
Screwdriver: bosch gsr 18 2 li plus
This model from Bosch is easy to use and very productive. The price is reasonable, you can buy the tool either for yourself at home or as a gift. It is an analogue of the gsr 120 li model, but has a slightly smaller mass.
Screwdriver: bosch gsr 18 2 li plus
Type of tool – drill-screwdriver, non-impact type. Installation of the working element - in a quick-release chuck. Drilling: up to 13 and 38 mm for metal and wood respectively. The diameter of the rear part of the drill is up to 13 mm.
Power is supplied by a 2 Ah lithium-ion battery. Voltage – 18 V, charging – about 1 hour. The kit includes 2 batteries at once.
The revolutions (up to 1900 per minute) are controlled electronically in 21 positions. The torque is also automatically adjusted. The brush motor can operate at 2 speeds. Reversing will help you get out a drill or stuck hardware. Safety controlled by start blocking and overheating and overload protection.
Options include built-in work area lighting and a magnetic tool holder.
The weight of the device is 1.49 kg, which will affect the duration of work and hand fatigue. Here you can add balanced ergonomics and a comfortable design. The whole set fits into a suitcase.
Screwdriver: metabo bs 18 ltx impuls
The metabo brand, as usual, shows another good drill/driver. Its main advantage is the balanced ratio between power and discharge time.
Screwdriver: metabo bs 18 ltx impuls
Purpose – drilling, dismantling and installation of fastening hardware. Chuck type – quick-release (does not require an additional key). Shank diameter – 1.5 – 13 mm. Largest drilling diameters: lumber – 65 mm, metal – 13 mm.
The electric motor is brush type. The work is performed at 2 speeds, maximum speed is 1700 per minute. The torque is automatically adjusted in 24 positions. The electronic unit will protect the mechanism from overloads.
Power supply: 18 V battery, 2 units are supplied in the kit. Type – Li-Ion, capacity – 4 Ah. This is extremely convenient - you can work almost without interruptions, leaving one to charge.
A belt hook is provided for convenience. There is a depth regulator and illumination of the working area. There is a compartment on the body for replaceable nozzles. The set comes in a case. Tool weight – 2.3 kg.
Screwdriver: makita dhp482z
The makita dhp482z device belongs to the class of cordless impact drill with a screwdriver function. But due to its small size and weight, it can also be called a screwdriver.
Screwdriver: makita dhp482z
The machine is an impact type, that is, the emphasis in functionality is on the rotation of the working body. Working with fasteners or drilling can be done on brick and even soft concrete. Maximum drilling diameters: wood – up to 38 mm, metal and concrete – up to 13 mm. Shank diameter – up to 13 mm. The chuck is of the quick-release type.
The electric motor is quite powerful, delivering up to 1900 rpm (shocks up to 28500). The device is multifunctional - the torque allows you to work even with an ice auger.
The spindle rotation is controlled electronically (there is a built-in unit). Adjustment is performed at 21 positions, plus hammer drilling mode. Gearbox – 2nd speed.
Power supply is from a battery with a voltage of at least 18 V. In addition, there is a flashlight to illuminate the work area.
The tool is considered durable and of high quality. There is a small disadvantage: due to the high power of the engine, the battery can discharge quickly.
Screwdriver: makita dfr550z
This option from makita is perfect for craftsmen who install profiles and panels using screw-in hardware. The belt mechanism has a high level of performance.
Screwdriver: makita dfr550z
Purpose – screws and screws with a diameter of up to 4 mm and a length of up to 55 mm. The cartridge is for bits. Operating mode: unstressed.
The electric motor is commutator, single-speed. Revolutions – up to 4000 per minute. There is a screw depth regulator. There is a reverse and locking of the power button.
Power supply – rechargeable: 18 V, type – Li-Ion. The charger and battery itself are not included in the delivery package of the screwdriver. It is possible to install batteries with a capacity of up to 4 Ah, which greatly increases mobility and operating time.
Weight – 2.14 kg (packed – 2.2 kg). The set includes 2 bits. For ease of working at height, there is a hook for hanging on a belt.
Price
A brushless screwdriver wins in most respects:
- Weight;
- Size;
- Efficiency;
- Autonomy;
- Safety;
- Durability.
However, many household users are put off by its price. If a person rarely uses a tool, then a collector budget model of the tool will be enough for him.
If we talk about professional equipment, then without a doubt we can say that a brushless screwdriver is worth the money. By paying more, a person gets a more convenient and autonomous tool that performs its functions better.
A more detailed answer to the question which screwdriver is better, brushed or brushless, can be found at the link: https://myinstrumenty.ru/elektroinstrument/kakoy-shurupovert-luchshe-schetochnyy-ili-bezschetochnyy/
Efficiency
Replacing the brush assembly with an electronic unit made it possible to increase the engine efficiency by up to 1.5 times. In brushless models it reaches 90%, so energy is used much more efficiently. This is especially important for cordless tools, which is why brushless motors are more common in cordless tools.
Increasing energy efficiency by 1.5 times allows for a corresponding increase in autonomy. That is, if a regular brushed tool can tighten 200 screws on one charge, then a brushless tool with the same power and battery capacity will tighten all 300.
The best brands
If you are planning to purchase a screwdriver, it is better to opt for a time-tested tool from well-known brands.
The best manufacturers of screwdrivers value their reputation and are constantly working to improve the tool.
Power tools from the German manufacturer Bosch have proven themselves well all over the world. The tools of the German companies Dewalt and Metabo are also considered reliable.
Among the Japanese manufacturers, Makita HITACHI can be distinguished.
Reliable tools at an affordable price are produced by the American company Black & Decker and the South Korean Hyundai.
Among the producers from the countries of the former socialist camp, Bulgaria can be distinguished. Screwdrivers under the Sparky brand are inexpensive and reliable.
When buying a tool, be sure to ask the seller about the warranty period and conditions.
