What in in this case What does the term "professional" mean? The most direct and correct interpretation is that it is intended for work on a commercial basis, that is, generating income for the master. The popular point of view that the differences between a professional instrument and a “household” (amateur) one are only in the level of manufacturing, to put it mildly, is incorrect. This means that you can only tell the difference technological features no way.
All aspects are equally important here: the ability to withstand intensive use, provide low fatigue, high precision and productivity, as well as payback. The last factor combines the ratio of initial cost and resource, availability and cost of maintenance, and reliability.
Nutrition
The second most popular tool after a hammer is a drill. A machine whose operating principle is extremely simple. All that is required is an easy-to-grip body and a motor to rotate the drill clamped in the chuck. Is it possible to complicate things here? It turns out that it is possible and even necessary. Let's begin with different materials require different speeds of rotation of the equipment, and the “drill” itself determines the speed of rotation. So, with an increase in the diameter of the hole being made, it is necessary to reduce the “revolutions”. Here's the reason for the first complication: the rotation speed needs to be adjusted. Responsible for this the electronic unit, built into the start key or separate from it. An extremely simple case is simple modulation of the input signal over time, that is, regular on/off. The effective voltage value changes, and with it the maximum engine speed.
This is exactly how a typical diagram for an amateur drill works. Its main disadvantage is that by reducing the frequency, we inevitably lose the torque reserve that is so necessary when working with viscous materials and/or large equipment. Now, if the “block” monitored the load and added watts at the moment when they were needed... This is exactly how circuits at the next level of complexity, worthy of a professional tool, function. Of course, the speed will still “float” depending on the load, but not within such large limits. Work will become more comfortable, more accurate and more productive.
Motor
The power supply for a “professional” motor is understandable. Now about the “heart” itself. They all have the same design - a commutator electric motor, but the execution is different. The efficiency, and therefore the heating, depends on the size and uniformity of the magnetic gap (between the armature and the stator). A low-quality motor overheats quickly. If it does not “burn out” immediately, the increased thermal load quickly destroys the wire insulation in the coils, interturn short circuits appear, and the destruction process progresses... But what prevents you from maintaining accuracy? This includes equipment, assembly culture and, of course, hull rigidity. By the way, the type (in fact, the cost) of the insulating varnish and hardening impregnation used also determines a lot - this is resistance to overheating and abrasive wear from sucked dust.
The next problem that requires high technological costs is mechanics. At idle, the rotor develops colossal speeds - 20-30 thousand per minute. Not every bearing can withstand this. Required condition ensuring reliability - using high-quality components, but this is not enough, it is important good protection from dust and tight fit. It is best if the front bearing is seated in the metal of the gearbox housing or, if it is not separate, in its metal shield. Household models often have neither a body nor a shield...
The rear support for all models is usually plastic. On high-quality machines there is a rubber bushing between the clip and the “bed”. If it is not there, there is a high risk of the entire bearing turning, which means immediate melting of the seating area and failure of the tool. Note that simply the absence or presence of a rubber ring does not mean much - on a household tool it may not be durable enough, but on a professional one it can be replaced with another modification, for example a clamp.
Another difficulty associated with turnover is balancing. Manufacturers of only household tools often do not have the equipment to accurately correct imbalances. A typical feature of products from such a plant is holes drilled in the armature cage. But if instead of them there are neat slots, it means the technology is up to par.
Gearbox
Rotation received next stage– its transfer to the cartridge. The drive gear teeth are always cut on the front shank of the armature shaft. If its metal is of the wrong grade or poorly heat-treated, rapid wear is inevitable. For the same reason, sudden “death” can occur - when a thick drill jams, the soft shaft can lead. Such a defect is atypical for a high-quality household tool, and even more so for a professional one.
If the drill is highly specialized, it has one pair of wheels in the gearbox; if it is universal, it has several. “Synchronizers” are responsible for the smoothness and accuracy of gear shifting; their task is to align the teeth of the pair being switched on, even if they do not match. For professional drills, their presence is the rule; for household ones, it is rather the exception.
In the gearbox, the torque increases many times, and the loads also increase. This is one of the reasons why a professional drill needs a strong and rigid gear housing. The best option is metal: it also provides good heat dissipation. But such a box is heavy, so professional models often use a plastic case. The external resemblance to a household machine is so great that one is tempted to wonder: is there a difference? Yes, and a very significant one!
In addition to internal reinforcing elements (cast metal shields), professional models have other secrets. The worst case is considered to be a case made of thin and smooth (shiny) plastic. The mirror-like cleanliness of the surface indicates that no filler was used - fiberglass. It makes molding difficult and worsens appearance. Some manufacturers solve this problem by increasing the binder content. This increases strength, but manufacturing accuracy suffers. Of course, the clumsy appearance is not so bad, but loose joints are already a serious flaw... Some of the famous companies also use original compositions, achieving unique qualities. For example, DeWALT makes models with glass-filled nylon bodies - they are strong, rigid and non-fragile.
Many household models have a gearbox with a metal housing. Maybe this equates them to professionals? Unfortunately no. It is important not only to make the casting, but also to process it well - uneven planes require thick gaskets that reduce rigidity, but this does not make the body airtight. And in professional models there are gearboxes assembled without gaskets or sealants at all, and the joints “don’t sweat” (I’ve seen this on Bosch models).
Gears and lubrication
Gears are mainly made using powder metallurgy methods; in rare cases, teeth are cut on machines. But mechanical processing is mandatory, although in household analogues it is often neglected. At the same time, the abrasion resistance decreases and large gaps are initially created.
Speaking about mechanics, one cannot fail to mention the most important component of durability - lubrication. Its selection is a delicate and complex task, the solution of which depends on the characteristics of the temperature regime, loads in friction pairs and materials. A good instrument can be used in very different ways. external properties compositions. It is clear that competent service is impossible without high-quality service support, but where can you get it if you purchase a product from a fly-by-night company?
“Everything in a person should be beautiful...” The same can be said about the instrument: both the filling and the appearance. Ergonomics depend on the shape, layout and weight distribution. Household models are made according to standard patterns, and companies engaged in the manufacture of products for professionals conduct their own research. This is only to the advantage of the master - you can always choose a car for yourself. At the same time, designers, if necessary, go off the beaten path, creating planetary gearboxes, adding angular gears (AEG ErgoMax), rotary brush holders and other unusual innovations.
Hammers
Close “relatives” of drills are hammer drills. Their fundamental difference is in the design of the impact mechanism - it is compression-vacuum. This type of tool is complex both from a design and technological point of view. As for the drive and power supply, the device and the differences between “amateurs” and “pros” are completely similar to drills.
The most important internal parts of a rotary hammer are the cylinder, its drive and the firing pin. Design complexity – compact placement. Why do most household models have a vertical layout and bulky dimensions? Don’t think that it’s because of the generosity of the manufacturer, who spared no metal to create a “killer” machine... Contrary to this approach, modern professional hammer drills usually so tightly “packed” that disassembling them is impossible without the use of special tools. The result is a convenient and lightweight, but at the same time productive tool for efficient work. By the way, companies specializing specifically in household tools often neglect the torque limiting clutch, and it is very important for safety!
Engineering work at the design stage is also of utmost importance. Calculation of the dynamics of the impact mechanism gives a strong blow with low recoil. On powerful machines this is not enough, so they install shock-absorbing handles (Milwaukee Kango) or come up with other moves. Pneumatics must be efficient and not suck in outside air (there is a lot of dust!). Lubrication is generally a separate issue: its properties should facilitate rapid access to operating mode and ensure low wear (if there is an excessive amount of lubricant, too much power will be expended).
Rubber seals must remain elastic for a long time, resisting abrasion and high temperature. The firing pin is susceptible to riveting. Of course, when developing such complex products, innovations from leading companies could not help but appear, for example, the authorship of the worldwide popular types of clamps SDS-Plus and SDS-Max belongs to Bosch.
The lightweight and powerful hammer drill is convenient to use as a low-speed drill. In a domestic class, to implement this opportunity, it will be necessary to install an adapter cartridge, which increases the longitudinal dimension and introduces “laxness” into the design. Professionals are able to surprise here too, for example, in the DeWALT D25104K-QS, the clamp for the drill is removable, and a cartridge is installed instead (replacement is done with a slight movement of the hand). A similar system is found in both Bosch (models with the DFR index) and Milwaukee (PLH 32 XE). And here is an example of a different kind - Elmos BM-60: this tool has a two-speed gearbox, the metal body of which is covered with plastic for safety reasons (to protect against burns when touched); The reverse function also allows for screwdriver work.
Cordless tool
However, such giant companies as Bosch, DeWALT and Milwaukee are able to offer absolutely incredible developments in this area: cordless rotary hammers. It is clear that there are no traces of any household analogues here: there are drills and screwdrivers with self-powered, but rotary hammers are much more “gluttonous”. That's why modern models cordless hammer drills have a voltage of 24 or 36 V.
By the way, the differences are easy to judge by traditional models. The first thing you notice when comparing a good professional screwdriver with an amateur one is the difference in torque. Increasing it without reducing output speed (it entails a loss of performance) is impossible with engine modernization alone (relatively simple). Motorists will easily understand the analogy with starting a car - even a working starter can barely turn the engine when the battery is useless.
Naturally, the operating time on one charge is also a topic for comparison. However, it is not the only one that is important - being equipped with spare batteries and a fast charger, the “pro” is able to work continuously. To reduce charging time, various technologies are used - battery cases are made metal or perforated (promotes heat dissipation), and “smart” electronics are installed that control the voltage and charge cycle. It was the development of these technologies that allowed the birth of many tools, the autonomy of which was previously unthinkable: construction vacuum cleaner(DeWALT), miter saws, circular saws and other saws (Bosch, DeWALT, Elmos, Milwaukee). There are also simply original ones, even if they don’t require high technology, but clearly not typical: for example, Elmos even makes a cordless stapler and jigsaw.
Now in everyday life: at the dacha, and beyond, it has become difficult to do without power tools: jigsaws, crosscut saws, drills, screwdrivers... Eternal construction, eternal repair. If you don’t have your own tool, you beg from your neighbor, not cleverly, of course, but God forbid it breaks. And then the time comes - you decide to buy. And here - such a choice and range of prices...
Personally, I had a bad experience using a DWT jigsaw and screwdriver, although a friend has been using a hammer drill of this brand for a long time and is satisfied. I have been using various power tools for a long time, both professionally and at home, and for myself I settled on the brand makita- although their tools are already being produced by China... I also noticed for myself Interskol- hasn’t let me down yet. Was good brand Fialent- the router and jigsaw served for a long time, even after they suffered a fire and barbaric attitude, and they still work. There are a lot of companies, there are just shops that sell only household tools, and then there is a selection of Chinese crap...
In general, decide for what purpose you need this device and go ahead.
All power tools are divided into professional and household. A professional tool designed for long hours of daily work. The quality of the materials used in its assembly is much higher than that of household ones, which significantly increases its reliability. The advantage of a household tool is its low cost and light weight. Many companies focus on ergonomics, i.e. appearance, ease of use. Household tools can be used for no more than 4 hours a day, and every 15 minutes you need to take breaks for about the same time.
Manufacturers of power tools are also trying to produce professional tool in developed countries where workers have a large professional qualifications. Accordingly, the production of household tools, where the manufacturing technology is less complex, is transferred to less developed countries, since labor is much cheaper there.
For example, the German company BOSCH manufactures all heavy equipment, including professional rotary hammers and drills, only in Germany, but delegates the production of amateur or “household” tools to China and Malaysia.
There are manufacturing companies that produce tools only for household or only professional use. But most manufacturers are focused on producing products in both directions, marking the tool with body color or letter designations. The distinctive indicators described below for the most famous companies will help you determine the purpose of the equipment.
BOSCH. The presence of blue color on the body indicates that this is a tool for professionals. Green color implies use in domestic conditions. You can also determine the purpose of a tool from this company by the first letter of the model. If its name begins with the letter P, then the power tool is a household tool. The letter G indicates a professional purpose.
Black&Decker, Ferm, DWT, SKIL, SPARKY, Rebir .
Companies produce tools only for household purposes, but semi-professional use is possible in various cases. construction teams or home craftsmen.
DeWALT, Hilti, Makita, AEG. Manufacturers are aimed at producing professional products.
URAGAN. The power tool is produced in three series:
- "Professional" marked with the letter R at the beginning of the model number designation. The title of the series speaks for itself:
- "Master" denoted by the letter M. This series is effective for frequent and intensive housework;
- "Amateur"- this model is intended for people who occasionally do small jobs around the house. Identified by letter N in the name of the number.
Sturm! Tools that can be classified as professional class are black in color. A different color of the case indicates use in domestic conditions.
Interskol. Brand of a domestic manufacturer. Does not have distinctive indicators in color or number. The direction of the equipment can only be determined by its technical characteristics.
Caliber .
Another baby Russian production. Manufactured in two series: household and semi-professional.
Semi-professional is designated in the model name by the additional word “Master”.
Energomash. Production is located in Russia, but trademark Energomash is owned by the German company Sturm! "
Hitachi. The company produces both excellent professional tools and also has an inexpensive household series.
Experts in the power tools market note fast growth specifically in the household segment. Here they have adopted their own classifications - from “no name” (made in China, low quality tool, dangerous to use, does not provide the desired end result) , to prestigious products Black&Decker, Metabo, Hitachi.
In turn, sellers of electric and pneumatic tools claim: with the current level of technology development, it is difficult to single out any one company as a leader, and even more so it is impossible to say who produces the best quality tool. Samples of products from leading world brands Bosch, Makita, Hitachi, DeWalt are approximately at the same level.
Of course, you can’t describe all brands, that’s not the point of this article, we just want to simplify your purchasing choice dilemma.
The main differences between professional and household tools.
The main difference is that professional power tools have higher resistance to long-term, same-type loads. Most often, professional power tools can be seen in the arsenal of technical and repair teams. However, some users, believing that a professional tool should “last for centuries,” purchase it for household use. Note that such a purchase does not make much sense - even if you are doing renovations in the apartment yourself, upon completion, the expensive tool will have to be “put on the shelf”, where it will remain inactive for long periods of time. Or you could get by with a household model, which costs 3 times less. In addition, if your plans include large-scale work, you can purchase a so-called semi-professional tool or “master class”, which has an increased service life.
Every man has at least a minimal set of power tools at home or in his garage. Most often it includes a hammer drill and grinder, an electric drill and a screwdriver, a jigsaw, etc.
If you need to update an existing one, or make an initial purchase of a tool, then a non-professional may have a problem with the choice, because... The market offers a wide range of models from dozens of different manufacturers. This article is intended to help such buyers make the right choice.
Industrial power tools
As a rule, craftsmen are individuals and do not use industrial tools due to their narrow specialization and very high cost. It is advisable to purchase it exclusively for industrial enterprises, or use in construction. Only here it is possible to recoup its value with high dividends.
The following power tool manufacturers are the undisputed leaders in this segment:
Professional power tools
In the mentioned market segment of this product, a tool is presented that was initially designed to perform a limited number of available operations, which, as a rule, does not exceed three. But with the highest quality.
This tool is characterized by a significant resource and power, exceeding the value of a similar parameter for semi-professional and household tools. Professional models they are more reliable, have increased wear resistance and are characterized by increased strength indicators (the body material is more resistant to mechanical loads, including shock).
They allow you to work in continuous mode for much longer than is permissible for household tools. In this case, there is no damage to the armature, windings, brushes and other internal structural elements.
Tools belonging to this group must have mechanical or electronic adjustment, allowing:
- smoothly change power;
- exclude sudden jerks during the work process at the start-up stage and during fixation;
- smoothly adjust the specified rotation speed;
- stabilize it as loads increase;
- protect the product from overload, automatically turning off when the specified values are reached;
- set max torque.
This group includes the following brands:
A characteristic distinctive feature of the instruments belonging to this group is their Blue colour. All German instruments from this brand are reliable and affordable. That is why they are preferred quite often;
Household power tools
The tools presented in this market segment are produced exclusively for home use. Many models are made using a special ergonomic design, which gives them additional visual appeal, and are focused on greater versatility and ease of use.
The main disadvantage of this category of tool is the prohibition on their continuous use for more than 3 – 4 hours a day. Moreover, during this time it is recommended to take at least three breaks lasting up to 15 minutes (within an hour).
The main advantage is cost. Therefore, in cases where occasional use of the tool is planned, this is the best option.
Let's consider several major manufacturers of power tools of the mentioned class that are worthy of mention:
Mains or battery, what to choose
All offered power tools are divided into two groups. The first includes products that require an external power source. They are called network.
The second includes a tool that allows you to work regardless of the presence or absence of a network, which is powered by its own battery. This tool is called a battery tool. This tool is characterized by ease of use, lightness and versatility.
The division mentioned applies to an instrument from any segment discussed earlier.
The advantages of network models are their power and increased reliability. But there are many situations. When performing work without using battery tool almost impossible.
This tool is better suited for work that requires frequent movement. Battery products are indispensable in explosive and fire hazardous areas.
The disadvantages inherent in such a tool are the periodic need for recharging, the significant cost of batteries and lower power ratings.
Russian manufacturers
On the shelves of specialized stores, a significant part of the power tools offered have Russian names. But, unfortunately, this does not always indicate that these goods were made in Russia.
Most of these products can be classified into two groups, which can roughly be called:
- Pseudo-Russian (a Chinese-made instrument from an unknown manufacturer, but under a Russian name);
- Assembled using the “screwdriver assembly” method on the territory of our country, but from the same Chinese (optionally from other) components of unknown origin.
And only a third of such power tools are actually developed and completely manufactured here.
Leading Russian manufacturers offering on the market own products, are:
- IMZ (Izhevsk) is a huge diversified production facility that produces weapons and microelectronics, devices for various purposes and a wide range of power tools. The products on the market are represented by the Baikal trademark (passed international registration);
- "Interskol", mentioned above. produces a wide range of power tools, but partly from imported components. The company owns a number of factories located in different parts of the world:
- BEZ – Russia;
- IPT – Italy;
- Two factories in China (in the cities of Jinghau and Shanghai).
Some of the products of this manufacturer are manufactured at partner enterprises, such as:
- IMZ - Russia;
- GGP - Slovakia;
- Starmix - Germany;
- Sparky - Bulgaria;
- Rexon - Taiwan;
- Keyang - South Korea and so on.
- OJSC PNPK (Perm) – power tools are a by-product of this company;
- KZMI (Konakovo) - Production is carried out using imported equipment. The model range includes about twenty items of power tools and pneumatic tools. The drills of this plant are considered one of the best among those produced in Russia. And the screwdrivers of this plant have no analogues among Russian-made products;
- EMZS "LEPSE" (JSC) Kirov produces electric shears, electric hammers and angle grinders;
- SEZ (Saratov);
- "Inkar-Parma" (LLC) - electric saw plant.
Power tools manufactured in Southeast Asian countries today account for up to half of the assortment that fills Russian shelves. This tool is offered in the lowest price category and can be presented to customers as products manufactured in the USA, Europe and even Russia. Many people know examples of the latter symbiosis. These are the brands of power tools:
- "Bison";
- "Caliber";
- "Energomash";
- “Progress – Tool”;
- "Resource";
- "Diopd";
- "Stavr";
- "Enkor";
- "Grad - M", etc.
First of all, let's find out how a drill differs from a hammer drill, and only then we can answer the question of how to choose a drill.
Today, almost all manufacturers sell impact drills. Using such a drill, you can perform the following types of work: drilling holes in various materials, including brick and concrete, tightening and unscrewing screws, self-tapping screws and self-tapping screws.
Rotary hammers additionally offer the following capabilities: drilling holes in particularly hard materials (reinforced concrete, stone), chiselling. Thus, at first glance, a hammer drill is preferable to a drill, but along with the advantages, it has a number of disadvantages.
First of all, with the same power, a hammer drill is more expensive than a drill. Due to the peculiarities of the fastening in the hammer drill chuck, it is impossible to use conventional drills without a special adapter (which often comes with standard set to the hammer drill), which lengthens the dimensions of the tool, creates additional vibration and thereby makes the hammer less durable, reliable and convenient to use.
A pleasant exception to this rule are rotary hammers with replaceable chucks. One of the most successful representatives of these models in terms of price-quality ratio is the BOSCH 2-24 DFR HAMMER.
However, if you do not need to perform a large amount of work with drilling in hard materials, then you may well opt for an impact drill. A good drill in this class is the BOSCH GSB 2-20 RE.
Cordless drills
The next thing to pay attention to is the power source. Basically, two options are used: from the mains and from the battery. It is advisable to use a self-powered tool where there are no sockets nearby, in hard-to-reach places and for work involving frequent movement of workers (it is very difficult to quickly move from one place to another, while dragging the wire behind you).
The disadvantages of such a tool are the short operating time between recharges and high cost. batteries(although many cordless tool models include two batteries and a charger).
Professional and household tool
All power tools are divided into professional and household. A professional tool designed for long hours of daily work. The quality of the materials used in its assembly is much higher than that of household tools, which significantly increases its reliability.
The advantage of a household tool is its low cost and light weight. Many companies focus on ergonomics, i.e. appearance, ease of use. Household tools can be used for no more than 4 hours a day, and breaks should be taken every 15 minutes for approximately the same amount of time.
Manufacturers of power tools are also trying to produce professional tools in developed countries, where workers have greater professional qualifications. Accordingly, the production of household tools, where the manufacturing technology is less complex, is transferred to less developed countries, because labor is much cheaper there.
For example, the German company BOSCH manufactures all heavy equipment, including professional rotary hammers and drills, only in Germany, while handing over the production of amateur or “household” tools to China and Malaysia.
How to distinguish a professional tool from a household one?
First of all, manufacturing companies try to inform the buyer about what kind of instrument he is buying by marking their products with cases of different colors. For information, there is a table where you can see what color a particular brand of power tool has for household and professional tools.
Now let's say a few words about the characteristics of the power tool. The main ones are: rated power, number of revolutions or rotation speed, maximum drilling diameter. An important point is adjusting the rotation speed. Almost all modern drills and hammer drills have this feature. The rotation speed depends on the force of pressing the start button.
Separately, it is worth noting two-speed drills. In these models, for a more rational use of the power of the tool, a mechanism is used that resembles the operating principle of a car gearbox. A good option for a two-speed drill is the BOSCH GBM 13-2 RE tool. The speed selection is carried out using a wheel. The drill is equipped with control electronics for precise centering; thanks to the reverse, it is suitable for driving in and out screws. This drill can also be used in a drill press stand.
Types of drill cartridges
1. Traditional, well-known cam or toothed chuck, in which the drill is secured with a key.
2. A quick-release chuck, in which a little hand effort is enough to secure the drill. The clamping quality of such a chuck is no worse than a serrated one. There are one- and two-sleeve quick-release chucks. The two-case cartridge has two rotating rings - for clamping and loosening. Easy-to-handle single-case cartridges (press+lock and auto-lock) offer the most convenient way to change the drill.
3. SDS collet chuck. These systems were developed by BOSCH. The most modern system is auto-lock. The spindle of the device is automatically locked after stopping and you just need to turn the drill chuck to replace and fix the drill. The convenient 1-speed drill BOSCH GSB 16 RE and the powerful 2-speed drill BOSCH GSB 22-2 RE are equipped with this chuck.
The BOSCH GSB 16 RE drill is equipped with an auto-lock lock, a comfortable grip for work, and control electronics. Its power consumption is 650 W. Select the speed using the adjusting wheel. Soft handle - for vibration-free work. The BOSCH GSB 22-2RE drill is perfect for the toughest drilling and screw driving jobs. Equipped with Auto-lock, vibration control, electronic speed control wheel, safety clutch for safe work, chrome-plated drill chuck, etc. Power consumption - 1010 W.
If you need an inexpensive good drill, then we can recommend BOSCH GBH 6 RE. This drill is convenient for working in narrow places, when drilling overhead, as it is very compact and weighs little. Also equipped with electronics for precise centering, practical carrying clip, completely ball bearings for a long service life, plastic housing reinforced with glass fibre. Its power consumption is 350 W. Almost all models of impact drills have analogues of cordless tools.
Now let's talk about hammer drills
Hammers are used for chiselling and drilling in concrete and stone. Using a hammer drill and a special chisel attachment, you can very quickly remove any tiles and tiles. To do this, simply turn on the rotation lock, and the hammer drill will operate in jackhammer mode. A hammer drill can easily make small openings, recesses, and cable channels.
The most interesting small hammer drills in the price-quality category are the following types:
BOSCH GBH 2-24 DSR. Efficient hammer drill with optimized impact mechanism, rotation lock for light chiselling work, Vario-lock system for locking the chisel in 36 angular positions, impact lock for drilling in wood and metal, electronic control for soft start, etc. Power - 620 W.
BOSCH GBH 2-24 DFR. In our opinion, the most worthy hammer drill in its class. It differs from the previous hammer drill in that it has a quick chuck change system (SDS-plus - for SDS drills and quick-clamping for conventional drills). In the previous model, a regular chuck is inserted into the hammer drill by extension, which lengthens the tool and creates additional vibration when drilling.
Without a high-quality and functional power tool, it’s hard to imagine how professional builder, so home handyman. Both require reliable equipment, despite the fact that the purposes and frequency of use of the tool will be different. But how can you understand how one hammer drill, for example, differs from another if they have the same parameters, but the price varies? It's all about the manufacturer's name and reputation. When it comes to important repair work, the quality of the equipment comes first, because it is important that the equipment is at its best important point didn't disappoint. Let's try to understand the colorful market of power tools and get to know its main players, and we recommend making a purchase in a trusted store mastershop.rf, which offers a huge range of equipment for both experienced professionals and beginners. You can choose an option to suit any budget, and qualified staff will advise and help. However, it still doesn’t hurt to understand the issue at least a little, so we suggest highlight the best manufacturers power tools.
Makita
Large Japanese company, whose products are sold in almost all countries of the world. The manufacturer dates back to 1915, but has been producing power tools since 1958. Since then, the company has built several new factories. Today their number has reached 8: production capacities are located not only in Japan, but also in Europe and China. Needless to say that the equipment of the factories is the most modern?
Makita produces screwdrivers, hammer drills, drills, milling cutters, grinders, saws, planes, jackhammers, wall chasers, impact wrenches and other equipment - all in a decent range, so it’s not difficult to choose the tool that best suits your requirements. The choice is constantly expanding, the company is introducing new solutions, improving all the lineup equipment and strives for maximum product ergonomics.
Experts call the tool Makita the best option for personal use as it combines highest quality and reasonable price. There is a separate product line for professionals. Each piece of equipment is designed and manufactured with a large margin of safety from high-quality durable materials, so the equipment serves faithfully for years.
Bosch
It is difficult to find a person who has not heard of Bosch technology. German company has become synonymous with quality, no matter how banal and pathetic it may sound. The huge concern produces various types of products, but they pay almost the closest attention to power tools. The manufacturer's factories operate in Europe, China and Russia, representative offices are open almost all over the world - in 150 countries.
The range of power tools is huge, and describing it is simply pointless. They produce absolutely all the equipment you might need. to a professional master or an amateur in carrying out repairs and construction work: drills, hammer drills, mixers, tools for wood and metal processing - the company produces a huge amount of equipment with different functionality and capabilities. The pricing policy is approximately the same as Makita.
A nice feature of the brand is that there shouldn’t be any problems with selection. The company tries to pay attention to detail and invests substantial sums in Scientific research and new developments, which allowed it to take a leading position in the global power tool market. 
Metabo
German The manufacturer Metabowerke GmbH will soon celebrate its centenary in the power tool market. Its history begins in 1924. Almost immediately, the manufacturer began manufacturing hand tools, then switched to power tools and made many important discoveries and inventions in this domain. It was here that they created the first electric drill, the first sanding machine, the first impact drill. Since then, the company has not ceased to reform the power tool market with its innovative solutions. In fact, we owe the manufacturer inventions that are used today all over the world. Until now, huge amounts of money have been invested in scientific research, and the company is constantly announcing new solutions. In 2015, the manufacturer became part of the Hitachi Koki Co. concern, but this did not affect the company’s policy.
Today the company produces a lot of different power tools, trying to take a comprehensive approach to construction and repair. A huge range of products is produced here, it is worth mentioning separately wide choose Supplies. It is impossible to say that the prices are affordable, but the company’s products cannot be called too expensive either.
The manufacturer understands that durability and resistance to heavy loads depend on the reliability of each element of the tool, so especially critical parts are made from reinforced components, and some models receive additional protection against premature wear. All this ensures high durability for both household and professional tools. 
DeWalt
There are also decent manufacturers of power tools overseas, and the main one is DeWalt. The history of the enterprise began in 1922 with the invention of the radial console saw, which was able to significantly increase productivity in woodworking. Since then, the company’s name has been inextricably linked with innovation, and the list of developments and inventions of the manufacturer can be long.
The company's factories are located in the USA, Canada, countries South America, Europe, and also in China. The range of electrical equipment includes more than three hundred items and includes various models drills, jigsaws, planes, hair dryers, polishing machines, jigsaws and jackhammers. In the North American professional power tool market, DeWalt is the number one brand. IN Lately tool sales have also increased sharply in Europe, and experts recognize the company one of the fastest growing in its field.
The product quality is the highest, and thanks to a thoughtful design and the introduction of our own developments, the tool is convenient and durable. With this, no repairs are scary! You have to pay for overseas quality – the company’s products cost more than similar ones from the already listed competitors, and not the entire range is represented on the domestic market. 
AEG
Power tools under the AEG brand are known even to those who repair work does it maximum once a year. It all started in Germany in 1883 with the production of light bulbs, and later the young company actively responded to the development of industry in the country, and already in 1898 introduced first compact drill. Within a few years, the manufacturer’s products conquered many countries. The company later introduced the first drill with a pistol-like handle, a form factor that is still popular today. This was followed by variable-speed, double-insulated drills, the first rotary hammers and straight grinders. The company became one of the pioneers in the world of cordless power tools.
The manufacturer has always focused on continuous development innovative technologies. Also great value they have always paid attention to the design and ergonomics of the tool, and even at the beginning of the last century, designers were invited to work on the development of new equipment. The company's factories have always been a model of innovation, both inside (state-of-the-art equipment) and outside (futuristic design).
Today, under the AEG brand, tools for drilling and chiselling, wood and metal work, fasteners, and various auxiliary equipment and accessories. After the Swiss company Atlas Copco bought the company, it sold the part of it that produces power tools, so today the facilities belong to the Chinese from Techtronic Industries. Part of the production was moved to China to a modern plant, and rotary hammers are still produced in Germany, but this is all lyrics - the main thing is that the quality and approaches to production have not changed. The AEG tool is durable and practically indestructible. 
Hilti
Another large and proven player in the power tool market. The history of the enterprise began in 1941 in Liechtenstein, then it was a small family company that produced lighters and car parts, but soon a reorientation took place, and in 1950 they began producing hand tools. Here they made the first powder mounting gun, improved the design of the hammer drill and still continue to work hard in the direction of innovation, and the concern includes several research institutes.
Hilti is considered one of the largest and most reliable manufacturers of professional power tools in the world. Representative offices operate in 120 countries, and in 1993 the manufacturer opened a subsidiary in Russia. Today it is engaged in direct sales of Hilti tools.
The manufacturer produces a wide range of hammer drills, drills, screwdrivers, sawing and cutting equipment, as well as Consumables. Several factories operate on different continents, the products have received a lot of prestigious awards and worldwide recognition. The quality is high, but the prices are appropriate. 
HITACHI
Large Japanese company with a name recognizable in dozens of countries, began its activities in 1910 with the production of electric motors. Later, the manufacturer began working in the field of household and computer equipment, made developments for trains, and in 1974 they designed the first drill with a microprocessor. Since then, the company has opened another branch of activity - the production of power tools.
The concern today includes many subsidiaries, production sites and representative offices. On modern factories among other things, they produce hammer drills, grinders, circular saws, drills, jackhammers and dozens of other products.
The company's tool is distinguished enough high quality, thoughtful design, wide range and reasonable price, and the combination of these advantages ensured a high level of sales of HITACHI tools all over the world. 
Black & Decker
The company was founded in 1916 in USA, and during its existence it has managed to introduce a lot of new technologies and solutions. Today, the manufacturer is considered one of the largest on its continent and in the world in the field of manufacturing power tools; its products are represented and actively sold in hundreds of countries. The company's first important achievement was the mass production of home drills; no one had done this before. After that, the manufacturer developed a comfortable handle and switch for the entire range of power tools, and then was the first in the world to introduce a portable electric drill for household use. Year after year, the product range expanded, it became more and more advanced and productive.
Today, the company still takes a responsible approach to production and development. The product range is able to satisfy any wishes and needs of customers. The manufacturer creates drills, hammer drills, screwdrivers, saws, woodworking tools, grinders and multifunctional tools- all at the highest level. 