Encyclopedia of fire safety

What is the difference between a professional instrument and an amateur one? Deciphering the Bosch tool markings What color is the bosch professional tool

What does the term “professional” mean here? the most direct and correct interpretation- designed for work put on a commercial basis, that is, bringing income to the master. The popular point of view that the difference between a professional tool and a “household” (amateur) one is only in the level of manufacture, to put it mildly, is incorrect. This means that it is impossible to determine the difference by technological features alone.

Edition PM

There is an opinion that professional tool differs from the "household" only in the level of manufacture. This is, to put it mildly, incorrect.



All aspects are equally important here: the ability to withstand intensive use, ensure low fatigue, high precision and productivity, as well as payback. The last factor combines the ratio of the initial cost and resource, availability and cost of maintenance, reliability.

Food

The second most popular tool after a hammer is a drill. Machine, the principle of which is simple to the limit. All it takes is a handy body to grip, a motor to turn the drill clamped in the chuck. Is it possible to complicate something here? It turns out that it is possible and even necessary. Let's begin with that different materials require different speeds of rotation of the equipment, and the “drill” itself determines the amount of revolutions. So, with an increase in the diameter of the hole being made, it is required to reduce the "turns". Here is the reason for the first complication: the speed of rotation must be regulated. An electronic unit built into the start key or separate from it is responsible for this. An extremely simple case is simple modulation of the input signal in time, that is, regular on / off. The current value of the voltage changes, and with it the maximum speed of the motor.

This is how a typical circuit for an amateur drill works. Its main drawback is that by reducing the frequency, we inevitably lose the torque reserve, which 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 how circuits of the next level of complexity, worthy of a professional tool, function. Of course, the speed will still “float” depending on the load, but not so much. Work will become more comfortable, more accurate and more productive.

The next level in the hierarchy belongs to "constant" electronics. Few tool brands have it, including Bosch, DeWALT, AEG and other leading companies. The electronic board in such tools is equipped with an inductive or other magnetic sensor and monitors the revolutions of the armature. In this case, the stability of the course will be the greatest, and the entire power reserve is always available.

It is worth saying a few words about the construct. Relatively simple circuits often performed directly in the trigger body, more complex ones require a separate board. The manufacturer of household models can afford to protect it from oxidation with varnish, from destruction - by grabbing the heaviest parts with hot glue. All this is not very reliable, the best option, long accepted as a basis by serious enterprises, is a complete filling with a polymer composition.

In the age of computers and microprocessors, it would be extremely short-sighted to assign such narrow functions to electronics. What else might be needed? Without going into details, we will simply list other options that have found application in drills: temperature control of the windings and forced shutdown to avoid overheating, limiting the torque developed by the motor, pulsed rotation, overload and maintenance indication - these are just a few popular improvements.

Motor

With the power of the "professional" motor is understandable. Now about the heart itself. Everyone has the same design - a collector electric motor, but the execution is different. The efficiency, and hence the heating, depends on the magnitude and uniformity of the magnetic gap (between the armature and the stator). A poor-quality motor quickly overheats. If it does not “burn out” immediately, the increased thermal load quickly destroys the wire insulation in the coils, interturn short circuits appear, the destruction process progresses ... But what prevents accuracy? This is equipment, assembly culture and, of course, the rigidity of the case. By the way, the type (in fact, the cost) of the used insulating varnish and hardening impregnation also determines a lot - this is resistance to overheating and abrasive wear by sucked dust.

The next problem requiring high technological costs is mechanics. At idle, the rotor develops colossal revolutions - 20-30 thousand per minute. Not every bearing can withstand this. A prerequisite for reliability is the use of quality components, but this is not enough, good dust protection and a tight fit are important. It is best if the front bearing fits into the metal of the gearbox housing or, if it is not isolated, into its metal shield. On household models, there is often neither a case nor a shield ...

The rear support of all models is usually plastic. On solid machines, there is a rubber bushing between the clip and the “bed”. If it is not there, there is a high risk of turning the entire bearing, and this is an instant melting of the landing site and failure of the tool. Note that the mere absence or presence of a rubber ring does not say much - on a household tool it may not be sufficiently resistant, but on a professional one it can be replaced with another refinement, for example, a clamping collar.

Another difficulty associated with "turnover" is balancing. Manufacturers of only household tools often do not have the equipment to accurately correct imbalances. A typical sign of products from such a plant is holes drilled in the anchor holder. But if instead of them there are neat slots, then the technology is on the level.

Reducer

The rotation is received, the next stage is 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 also occur - when a thick drill is jammed, a soft shaft can lead. Such a defect is not typical for a good-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 - several. “Synchronizers” are responsible for the smoothness and accuracy of switching speeds, their task is to match 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 an 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. Best Option- metal: it also provides good heat dissipation. But such a box is heavy, so professional models often use a plastic case. At the same time, the external resemblance to a household machine is so great that one is tempted to think: is there a difference? Yes, and very important!

In addition to internal reinforcing elements (cast metal shields), professional models have other secrets. The worst case is considered to be 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. Strength from this increases, but manufacturing accuracy suffers. Of course, the clumsy appearance is not so terrible, 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 not brittle.

Many household models have a gearbox with a metal case. Maybe this equates them to professional ones? Unfortunately no. After all, it is important not only to make a casting, but also to process it well - uneven planes require thick gaskets that reduce rigidity, but this does not make the case airtight. And in professional models there are gearboxes assembled without gaskets and sealants at all, while the joints “do not sweat” (I had to see this on Bosch models).

Gears and Lubrication

Gears are mainly made by powder metallurgy, in rare cases, the teeth are cut on machines. But machining is mandatory, although it is often neglected in household counterparts. At the same time, abrasion resistance decreases and large backlashes are initially laid.

Speaking of 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. In a solid tool, compositions that are very different in external properties can be used. It is clear that competent service is impossible without high-quality service support, but where can you get it if you purchase goods from a one-day company?

“Everything should be perfect in a person…”. The same can be said about the tool: both filling and appearance. Ergonomics depends on the shape, layout and weight distribution. Household models are made according to standard patterns, and firms engaged in the manufacture of products for professionals conduct their own research. The master is only at hand - you can always pick up a car for yourself. At the same time, designers, if necessary, turn off the beaten path, creating planetary gearboxes, adding corner gears (AEG ErgoMax), swivel brush holders and other unusual innovations.

Perforators

Close "relatives" of drills are rotary hammers. Their fundamental difference is in the design of the percussion mechanism - it is a compression-vacuum one. A tool of this type is complex both from a constructive point of view and from a technological point of view. As for the drive and power, the device and the differences between "amateurs" and "pros" are completely similar to drills.

The most important internal parts of the perforator are the cylinder, its drive and the striker. Structural complexity - compact placement. Why do most household models have a vertical layout and bulky dimensions? You should not think that it is from the generosity of the manufacturer, who did not spare the metal to create a “killer” machine ... In defiance of this approach, modern professional rotary hammers are usually so tightly “packed” that their disassembly is impossible without the use of special tools. The result is a handy and lightweight yet powerful tool for effective work. By the way, firms that specialize 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 the utmost importance. The calculation of the dynamics of the percussion mechanism gives a strong impact 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 in it!). Lubrication is a separate issue in general: its properties should contribute to a quick start to the operating mode, to ensure low wear (if too much lubrication is used, too much power will be consumed).

Rubber seals must retain elasticity for a long time, resisting abrasion and high temperature. The striker is subject to riveting. Of course, when developing such complex products, innovations from leading companies could not but appear, for example, the authorship of the world-wide types of clamps SDS-Plus and SDS-Max belongs to Bosch.

Lightweight and powerful, it is convenient to use as a low-speed drill. In the domestic class, to realize this possibility, it will be necessary to install an adapter cartridge, which increases the longitudinal dimension and introduces “laxity” into the design. Professionals are able to surprise here too, for example, in the DeWALT D25104K-QS, the drill clamp is removable, and a cartridge is installed instead of it (replacement is done with a slight movement of the hand). A similar system is found in 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 allows you to perform screw-driving work.

cordless tool

However, giant companies such as Bosch, DeWALT and Milwaukee are able to offer incredible developments in this area: cordless rotary hammers. It is clear that there are no household analogues here at all: there are self-powered drills, but hammer drills are much more “gluttonous”. Therefore, modern models of cordless hammers have a voltage of 24 or 36 V.

By the way, it is easy to judge the differences by traditional models. The first thing you pay attention to when comparing a solid professional screwdriver with an amateur one is the difference in torque. Its increase without reducing the output speed (it entails a loss of performance) is impossible only with the modernization of the engine (relatively simple). Motorists will easily understand the analogy with starting a car - even a working starter barely turns the engine when the battery is useless.

Naturally, the duration of work on a single charge is also a topic for comparison. However, it is not the only one important - being equipped with spare batteries and a quick charger, the "pro" is able to work continuously. To reduce the charging time, different technologies are used - battery cases are made of metal or perforated (facilitates heat removal), “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: a construction vacuum cleaner (DeWALT), miter, circular and other saws (Bosch, DeWALT, Elmos, Milwaukee). There are also simply original ones, albeit not requiring high technology, but clearly not typical: for example, Elmos even makes a cordless stapler and jigsaw.

Many hardware stores that sell construction tools offer a wide range. Many buyers have a reasonable question: how does a professional tool differ from a tool for everyday use? After all, it is worth noting that in terms of its main purpose, appearance and capabilities, a professional and household tool is actually no different. As a standard, vibrating plates are rammed, a saw is sawing, a screwdriver is twisting, etc. If you follow all the rules, then a professional and household tool equally performs its tasks with high quality. But what is the difference?

Household tool

Often, a household tool is used only for occasional work in the country, around the house or in the garage. For example, a grinder is used when it is necessary to cut off a piece of metal, a drill to hang a donated picture, hang a shelf, fix a cornice, etc. When a tool is used so infrequently, then the performance of the tool does not matter, the price comes to the fore, and manufacturers produce such a tool at a very reasonable cost. Such a tool goes on sale in a regular box and is extremely rarely completed. accessories to expand the scope of work.

Professional type tool designed for 24/7 use. Such a tool, 24 hours a day, is ready to perform the tasks assigned to it. For example, on construction site used not only for drilling holes in metal, wood, concrete, ceramic tiles, but also for mixing solutions when laying tiles or floor screed. Some Heavy Duty models can even do the unusual job of driving screws and screws. And a special grinding nozzle makes it possible to grind metal, wood and other materials.

In this case, the performance of the tool is of great importance, therefore, such a tool, which is offered by Milwaukee-Milwaukee, Wacker Neuson - Wacker Neuson, etc., has a large margin of power and performance relative to household tools. Often, such a tool has more robust design in which wear-resistant materials are used. All solutions that developers use when creating such a tool are aimed at increasing reliability, ergonomics, convenience and reducing worker fatigue. This tool makes it equally comfortable to use with both left and right hands.

Professional tool with electric drive supplied with a longer and frost-resistant electric power cord. On average, 2-3 meters longer than in household models. An industrial-grade tool is necessarily equipped with additional devices for more efficient work. For example, an electric planer may have a set of tools for sampling a quarter, and a tool for cutting rails.

A similar tool is supplied in a special impact-resistant case, so it can be easily moved from site to site, which is important for construction companies. Suitcase - Box Milwaukee is practical and adapted for carrying both the tool itself and various accessories, it is not afraid of falls and bumps. Cordless professional tools are equipped with pulse charge chargers, which reduces the charging time to forty minutes. Moreover, it is possible not only to charge the battery, but also to work in a charge-saving mode.

Where to buy Milwaukee industrial grade tools at great prices?

If you wish and construction equipment from the world famous brands Milwaukee (Milwaukee), Euroboor, (Euroboor), Wacker Neuson (Wakker Neuson), Kaeser (Kaiser compressors) on favorable terms, then the online store of power tools "Instrument - 24" is exactly the option that you have been waiting for so long were looking for. We offer a wide range of products from trusted manufacturers who offer tools and equipment of a professional type. The quality of technology is confirmed by time and by many construction companies around the world.

During our activity, we managed to establish partnerships with many manufacturers directly, which has a positive effect on pricing - the intermediary markup is excluded. If you have any difficulties during the selection process, our experienced consultant manager with extensive experience will come to the rescue. The quality of each unit of the tool is confirmed by the relevant certificates.

Any man at home or in the garage has, at least a minimal set of power tools. Most often, it includes a puncher and a grinder, an electric drill and a screwdriver, an electric jigsaw, etc.

If an update to an existing one is required, or an initial purchase of a tool, then a non-professional may have a problem with the choice, because. on the market in a wide range presented models of dozens of different manufacturers. Help these buyers make right choice this article is intended.

industrial power tool

As a rule, masters are individuals; they do not use an industrial tool, due to its narrow specialization and very high cost. It is advisable to purchase it exclusively for industrial enterprises, or use in construction. Only here you can recapture its value with high dividends.

In this segment, the undisputed leaders are the following manufacturers of power tools:


Professional power tool

In the mentioned market segment of this product, a tool is presented that was originally 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 a semi-professional and household tool. Professional models are more reliable, have increased wear resistance and are characterized by increased strength indicators (the material of the case is more resistant to mechanical loads, including shock).

They allow you to work in continuous mode much longer than is acceptable for household tools. At the same time, there is no damage to the armature, windings, brushes and other internal structural elements.

Tools belonging to the group under consideration must necessarily have mechanical or electronic adjustment, which allows:

  • smoothly change power;
  • exclude sharp jerks during operation at the start-up stage and during fixation;
  • smoothly adjust the set rotation speed;
  • stabilize it with increasing loads;
  • protect the product from overload by automatically switching off when the preset values ​​​​of the latter are reached;
  • set max torque.

This group includes the following brands:


characteristic distinctive feature tools belonging to the group under consideration is their blue color. All German tools of the specified brand are reliable and affordable. That is why they are preferred quite often;


household power tool

The tool presented in this market segment is 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 operation.

The main disadvantage of this category of tool is the ban 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 of 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.

Consider several major manufacturers of power tools of the mentioned class, worthy of mention, these are:


Mains or battery, what to choose

All offered power tools are divided into two groups. The first includes products that require an external power supply. They are called networks.

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. Such a tool is characterized by ease of use, lightness and versatility.

The mentioned division concerns the instrument from any segment considered earlier.

The advantages of network models are their power and increased reliability. But there are many situations. When performing work without using cordless tool almost impossible.

This tool is better suited for jobs that often require moving around. Battery products are indispensable in explosive and fire hazardous areas.

As a disadvantage inherent in such a tool, it should be noted the intermittent 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 proposed power tools has Russian names. But, unfortunately, this does not always indicate that these goods are made in Russia.

Most of these products can be attributed to two groups, which can be conditionally called:

  • Pseudo-Russian (a Chinese-made tool from an unknown manufacturer, but under a Russian name);
  • Assembled by the "screwdriver assembly" method on the territory of our country, but from the same Chinese (option, from other) components of unknown origin.

And only a third of such power tools are actually developed and completely manufactured by us.

The leading Russian manufacturers offering their own products on the market are:

  • IMZ (Izhevsk) is a huge diversified production that produces weapons and microelectronics, devices for various purposes and power tools in a wide range. On the market, the products are represented by the Baikal trademark (passed through international registration);
  • "Interskol", mentioned above. produces a wide range of power tools, but partially 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).

Partially, 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 etc.
  • OJSC PNPPC (Perm) - power tools are a side production of this company;
  • KZMI (Konakovo) - Production is carried out on imported equipment. The lineup has 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 do not have, among the products Russian production, analogues;
  • EMZS "LEPSE" (JSC) Kirov produces electric scissors, electric hammers and angle grinders;
  • SEZ (Saratov);
  • "Inkar-Parma" (LLC) - a power saw plant.

Power tools manufactured in the territory of the Southeast Asian countries today account for up to half of the assortment that fills Russian counters. This tool is offered at a lower price point and can be presented to buyers as products made in the USA, Europe and even Russia. Many people know examples of the last symbiosis. These are the brands of power tools:

  • "Bison";
  • "Caliber";
  • "Energomash";
  • "Progress - Tool";
  • "Resource";
  • "Diopd";
  • "Stavr";
  • "Encore";
  • "Grad - M", etc.

Which supplies the Russian market with a lot of goods for both professional and domestic use. Screwdrivers, drills, rotary hammers, angle grinders, Bosch milling cutters are popular with buyers. Perhaps, it is against the background of this popularity that the question of marking the company's tool very often arises. Robert Bosch.

As you know, many manufacturers of power tools use in the names of models alphanumeric code. This code allows you to determine the most important parameters of the tool already by name. This is how Bosch labels its products, but in addition, color coding is also used.

Power tool color

So let's start with color. Go to any power tool store (you can also visit our store). What colors you will not see on the shelves: blue, green, yellow, orange, red, purple, gray... Eyes widen from the variety! Some manufacturers only "paint" products in the colors of their brand, but not all do this. And Bosch is a great example of this. By the color of the power tool, you can determine its purpose: blue (dark green) is a professional tool, and light green is a household one. Simple and clear.

  • For household tool- work no more than 4 hours a day with a 15-minute break every hour
  • For professional tool- work no more than 16 hours a day with a 15-minute break every hour.

Alphanumeric marking

The names of Bosch power tools contain, as mentioned above, combinations of letters and numbers. Let's define what they mean. To make it clearer, let's take the name of some perforator from our catalog. For example, a Bosch GBH 2-28 DFV rotary hammer (product code - 80892).
So, the marking is GBH 2-28 DFV. The first letter indicates the purpose of the tool:

G- professional, the first letter from German word gewerblicher - commercial
P- household, the first letter from the German word persönlichen - personal
A- garden
B,D- measuring

We figured out the first letter: our Bosch GBH 2-28 DFV rotary hammer is for commercial use, that is professional!

Now let's move on to the next letters (letters 2 and 3), which indicate the type of tool: BH is the designation of the punch. Here is a list of other abbreviations:

BH(Bohrhammer) - perforator
SR(Schlagbohrschrauber) - screwdriver
SH(Schlaghammer) - jackhammer
WS(Winkelschleifer) - angle grinder
SB(Schlagbohrmaschinen) - impact drill
BM(Bohrmaschinen) - hammerless drill
D.B.(Diamantbohrmaschinen) - diamond drill
EX(Exzenterschleifer) - eccentric sander
SS(Schwingschleifer) - vibration grinder
HO(Handhobel) - planer
ST(Stichsägen) - jigsaw
KS(Kreissäge) - circular saw
SA(Säbelsäge) - reciprocating saw
OF(Oberfräse) - milling cutter
KF(Kantenfräse) - edge router
AS(Absaugsysteme) - vacuum cleaner
HG(Heißluftgebläse) - thermal blower
KP(Klebepistole) - glue gun
NA(Nager) punching scissors
SC(Scheren) cut scissors
PO(Polierer) - polishing machine
GS(Geradschleifer) - straight grinder
SM(Schleifmaschine) - whetstone
BS(Bandschleifer) - belt grinder
DA(Deltaschleifer) - delta grinder
RL(Rotationslaser) - rotational laser
LL(Linenlaser) - Linear laser
PL(Punktlaser) - point laser
OL(Optisches Nivelliergerät) - optical level
MS(Multidetektor seiner) - detector
LM(Laser-Entfernungsmesser) - laser rangefinder
WM(Winkelmesser) - goniometers
NM(Neigungsmesser) - levels
FS(Farbsysteme) - spray guns

By analogy, a manual professional milling cutter from Bosch will be designated as GOF, and a professional grinder - GWS ... Got it? Move on!

Usually three letters are followed by two numbers separated by a hyphen. They represent the characteristics of this type tool. For example, for our Bosch GBH 2-28 DFV rotary hammer, the code 2-28 indicates the weight and maximum drilling diameter: 2 kilograms and 28 millimeters. The grinder can be found such a designation 15-125, which indicates the power and maximum disk diameter: 1.5 kW and 125 mm.

The last letters usually denote additional functionality of the tool. However, standard capabilities are usually not specified. Here are some codes for the last letters in the marking of Bosch tools:

A– (Absaugeinheit) integrated dust extraction system
B– (bügel) toggle handle
C– (Constant-Electronic) system for stabilizing the rotation speed when the load increases
D– (Drehstopp zum Meißeln) rotation lock
E– (Elektronik) speed control
F– (Futter) replaceable drill chuck
H– (Handgriff) straight handle
I– (Intelligent) inrush current limitation, protection against unintentional switching on and jamming during operation (KickBack stop), new casing fixation (LVI)
J– starting current limitation
L– (Leistungsstark) increased power or performance
P– (Pendelung) the presence of a pendulum
R– (Revers) reverse, switching the direction of rotation
T– (Torque-Control) torque control
V– (Vibration-Control) special anti-vibration system
X– circle braking system (Bosch Brake-System)

Thus, our Bosch GBH 2-28 DFV rotary hammer has the following additional features: D - rotation lock, F - replaceable drilling chuck, V - vibration protection. Some functionality is not marked, as it is standard for such punchers...

Well, that's all we wanted to tell you about the labeling of Bosch products. We hope the information was useful!

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.

To date, almost all manufacturers are selling impact drills. Using such a drill, you can perform the following types of work: drilling holes in various materials, including brick and concrete, driving and unscrewing screws, self-tapping screws and screws.

Hammer drills additionally offer the following features: 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 fastening in the punch chuck, it is impossible to use ordinary drills without a special adapter (which often comes standard with the punch), which lengthens the dimensions of the tool, creates additional vibration, and thus makes the punch less durable, reliable and easy to use.

A pleasant exception to this rule are rotary hammers with a replaceable cartridge, one of the most successful representatives of these models in terms of price and quality is the BOSCH 2-24 DFR PUNCH.

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 type drill. A good drill from this class is the BOSCH GSB 2-20 RE.

Cordless drills

The next thing to pay attention to is the power supply. Basically, two options are used: from the network and from the battery. It is advisable to use a self-powered tool where there are no outlets nearby, in hard-to-reach places and for jobs associated with frequent movement of workers (it is very difficult to quickly move from one place to another, while dragging the wire with you).

The disadvantages of such a tool are the short time between recharges and the high cost of batteries (although many models of cordless tools come with two batteries and a charger).

Professional and household tool

All power tools are divided into professional and household. The professional tool is designed for many hours of daily work. The quality of the materials used in its assembly is much higher than that of a household tool, which significantly increases its reliability.

The advantage of a household tool is its low cost, light weight. Many firms focus on ergonomics, i.e. appearance, ease of use. A household tool can be used in work 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 make professional tools in developed countries, where workers have more professional skills. Accordingly, the production of household tools, where the manufacturing technology is less complicated, is transferred to less developed countries, because. labor is much cheaper there.

For example, the German company BOSCH manufactures all heavy equipment, including professional hammer drills and drills, only in Germany, while the amateur, or "household" tool, outsources production to China and Malaysia.

How to distinguish a professional tool from a household one?

First of all, manufacturers try to inform the buyer about what tool he is buying by marking their products with cases different color. For information, a table is provided where you can see what color a particular brand of power tool has a household and professional tool.

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 to adjust the rotation speed. Almost all modern drills and rotary hammers have this feature. The rotation speed depends on how hard you press 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 principle of a car gearbox. A good option for a two-speed drill is the BOSCH GBM 13-2 RE tool. The choice of the number of revolutions is carried out using the wheel. The drill is equipped with control electronics for precise centering, thanks to the reverse it is suitable for driving and unscrewing screws and screws. Also, this drill can work in a drill stand.

Types of cartridges for drills

1. Traditional, well-known cam or toothed chuck, in which the drill is fixed with a key.

2. Keyless chuck, in which a small hand force is sufficient to secure the drill. The clamping quality of such a cartridge is not worse than a toothed one. There are one- and two-sleeve keyless chucks. The double-case cartridge has two rotating rings - for clamping and loosening. The easy-to-handle single-sleeve chucks (press+lock and auto-lock) offer the most convenient way to change drills.

3. SDS collet chuck. These systems are developed by BOSCH. The most modern system is auto-lock. The spindle of the device is automatically blocked after a stop and it is enough just to turn the drill chuck to change and fix the drill. This cartridge is equipped with a convenient 1-speed drill BOSCH GSB 16 RE and a powerful 2-speed drill BOSCH GSB 22-2 RE.

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 watts. The choice of the number of revolutions - using the adjusting wheel. Soft grip - for vibration-free operation. The BOSCH GSB 22-2RE drill is perfect for the toughest drilling and screwdriving 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 you can recommend BOSCH GBH 6 RE. This drill is convenient when 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, fully ball-bearing for long service life, glass-fibre reinforced plastic housing. Its power consumption is 350 watts. Almost all models impact drills have analogues of cordless tools available.

Now let's talk about perforators

Hammer drills are used for chiselling and drilling in concrete and stone. With the help of a perforator and a special chisel nozzle, you can very quickly remove any tile and tile. To do this, just turn on the rotation lock, and the hammer will work in jackhammer mode. The perforator can easily make small openings, recesses, cable channels.

The most interesting small hammers in the price-quality category are the following types:

BOSCH GBH 2-24 DSR. Efficient rotary hammer with optimized impact mechanism, rotation lock for light chiselling, Vario-lock system for locking the chisel in 36 angle 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 perforator of its class. It differs from the previous hammer drill in that it has a quick change cartridge system (SDS-plus for SDS drills and quick-clamping for conventional drills). In the previous model, a conventional chuck is inserted into the hammer drill by extension, which lengthens the tool and creates additional vibration when drilling.

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