Rotary hammers: TOP-20 rating of 2022 models of professional and household rotary hammers based on consumer reviews (65 photos)

Types of rotary hammers

First of all, when choosing a tool - not just a hammer drill - it is worth answering two questions: how often will you use the tool and what do you need it for.

If you want to do home renovations and don’t plan to frequently drill holes in the walls in the future, then there is no point in spending money on expensive professional equipment. Otherwise, professional craftsmen can safely pass by shelves with “household” devices, since they are not intended for daily and complex work.

Like other repair tools, hammer drills can be divided into three types:

• Household . A distinctive feature is its low weight, within five kilograms. Used for home repairs and simple work. Often, for the sake of savings, manufacturers refuse additional functions and complex settings.
• Semi-professional . A borderline option that is suitable for both amateurs, not limited by budget, and professionals. Such hammer drills are more powerful and, accordingly, heavier than household models.
• Professional . The most serious cars are powerful and heavy. A professional hammer drill can weigh more than 9 kg. Often has increased impact power. They can withstand high intensity of work and do not require frequent breaks in drilling.

9.Terms of use

How correctly you use your hammer drill will directly determine its performance and service life . First of all, it is advisable to use only “original” components that are suitable specifically for this model. After completing any work, be sure to clean and lubricate the tool. Once every certain period of time, which depends on the intensity of use, it is better to carry out internal cleaning in specialized service centers. The constant entry of dust into the tool will eventually lead to failure of the power button or other mechanisms.

When performing large volumes of work, it is necessary to take regular breaks to allow the tool to cool, otherwise you risk exposing the engine to overheating. If the task is to drill a deep hole, it is better to do the work in several approaches , constantly removing the drill from the hole. This way you can simultaneously clean the hole and give the hammer a rest.

not put too much pressure on the tool when working, as this will only result in premature failure of the impact mechanism or overheating of the engine armature. The most difficult mode for the tool is the chiselling mode; use it for short periods of time , taking regular breaks of several minutes or switching the hammer drill to rotation mode. This will not only cool the tool, but will also allow the lubricant to be evenly distributed.

The boot and brushes must be replaced immediately as soon as the need arises. Don’t forget about protective equipment for yourself when working with a rotary hammer - be sure to use safety glasses when working with hard surfaces and don’t forget about a respirator. Take care of your instrument and then, in capable hands, it will serve you for many years.

Which brand of hammer drill should I choose?

Today, in any consumer electronics store you can find a couple of hammer drills from mass brands. However, we advise you to go to a special store for a special tool. There is more choice - and prices are often lower.

But how can a beginner understand the abundance of manufacturers and models presented? It is clear that you will have to pay extra for proven brands, and market newcomers often cost less. The price difference between the two classes of devices can reach 30-35%. But is such a discount worth the risk?

For example, hammer drills from the legendary Hitachi, Makita and Bosch cost 3-5 thousand rubles more than tools from little-known companies. Brands ask for money not only for the name, but also for the quality of the instrument for which they became famous. In addition, iconic companies often concentrate only on the production of power tools, and therefore rely on quality and technical know-how. This applies not only to professional models that embody the best engineering solutions, but also to simpler, household tools.

Of course, new companies try to attract new fans with a low price, an interesting set of supplies, or an additional guarantee. Therefore, you need to think carefully about what is more important to you - a couple of additional drills or, for example, an ergonomic design.

In any case, when choosing a hammer drill for professional work, we advise you not to save money and take a closer look at well-known brands that provide a guarantee of at least 36 months. If you need a hammer drill for your home, you can also evaluate inexpensive models from Chinese manufacturers, since the pace of home repairs depends on you. If the hammer drill breaks down on site, the timing of all work may be at risk, but at home you can calmly hammer the walls at a rhythm convenient for you.

Don't forget to carefully review the instrument's data sheet. This way you will find out all the technical characteristics of your future hammer drill and will be able to compare the models that interest you in all respects.

Review of popular hammer drill models for home

The information in the table is given as of prices in February 2022. Up-to-date information can be easily found on the Internet in a few minutes. These data demonstrate the dependence of cost on brand, equipment, and other basic parameters.

Popular hammer drill models

Model/brand	Power, W	Maximum revolutions/number of blows, per min.	Impact force, J	Maximum hole diameter (concrete), mm
PE-420/ ENKOR	420	1500/6680	1,5	1950-2180
P-22/Bison	650	870/4500	2	3600-4200
BDR26K/ BLACK & DECKER	800	900/4000	3	3800-4500
PRT650A/HAMMER	650	1000/4850	2,2	4500-5100
PBH 2100 SRE /BOSH	550	2300/ 5800	1,7	5900-6700

The packaging largely determines the final cost.

What to look for when choosing a hammer drill?

A hammer drill is a serious tool for punching holes in any material. Therefore, first of all, you should pay attention to the impact force of the model that you like. It will determine what materials you can work with, how long the process itself will last and how comfortable it will be. A tool with low (up to 2 J) or medium (4 to 10 J) impact force is suitable for home use. For professionals, it is better to take a closer look at hammer drills with a stronger impact (from 10 J).

What does impact force depend on? First of all, it depends on the power of the tool. The lowest power ones - up to 800 W - are suitable for home repairs. Medium-power (from 1000 to 1300 W) and high-power hammer drills (from 1300 W) are aimed at the professional market.

The next characteristic is the versatility of the tool. Rotary hammers can not only gouge holes, but also drill them. Therefore, if you need a multi-functional tool, you should avoid choosing rotary hammers with one operating mode. Some professional tools can also drill.

Another important parameter for any master is the ergonomics and weight of the device. Naturally, the heavier the instrument, the more powerful it is. Therefore, professional hammer drills can weigh from 7 to 12 kg. You won’t be able to hold such a tool in your hands for a long time, which will naturally affect the pace of work. There are two options: go to the rocking chair or choose an easier hammer drill. The optimal weight for home is 3-5 kg.

Last but not least, the factor is the type of food. It is logical that there are wired and wireless devices. The first ones are perfect for home repairs, since the outlet is most often at hand. Cordless hammer drills are useful in a de-energized facility where there is no electrical wiring yet.

A special case is pneumatic hammer drills. They operate from high-pressure pneumatic systems, which are usually located in workshops. If you do not plan to work in a factory, then simply avoid the shelves with this tool; you are unlikely to need such hammer drills in everyday life.

TOP 5 best, for pros

1. Makita HR2450FT− RUR 7,948
2. Bosch GBH 2-26 DFR− 9158 r.
3. Hitachi DH24PC3− 8876 r.
4. Bosch GBH 2-28 DFV Professional− 10,495 RUR
5. Interskol PA-10/14.4R-2− 7529 rub.

The most popular and reliable among modern manufacturers of rotary hammers are considered to be devices from such brands as:

• Bosch;
• Bort;
• Makita;
• Defort;
• DeWalt;
• Elitech;
• Hammer;
• Hilti;
• Hitachi;
• Hyundai;
• Kress;
• Kruger;
• Metabo;
• AEG;
• Bison;
• Interskol.

If low cost is important, then pay attention to the following rating:

The best cordless hammer drills

DeWalt DCH481N-XJ

Another professional cordless hammer drill, whose characteristics are very similar to the previous model. Equipped with a 3,000 mAh battery. It has three operating modes: drilling, drilling and chiselling. Chambered for SDS Max cartridge. The advantages include the force of the impact mechanism of 6.1 J with a small weight of 5.4 kg for such power. Users note the high ergonomics of the device: the handle is equipped with a start button, which comfortably fits several fingers of the palm. For additional convenience, the manufacturer added a removable handle for drilling to the package.

True, specifically for this model, the manufacturer did not put anything else in the box. Additional batteries and charging for the hammer drill must be purchased separately. Because of this, the price of the device seems too high - from 38 thousand rubles in Russia. If such amounts do not scare you, then the tool is perfect for construction and finishing teams, installation of windows, entrance doors and even satellite dishes.

Price: ₽ 44,100

Bosch GBH 180-LI

The company that invented the rotary hammer (Bosch made the first rotary hammer in 1932) continues to produce high-quality tools to this day. GBH 180-Li differs from other models of the brand by its battery capacity of 4,000 mAh. In this case, the weight of the assembled device (including the battery) does not exceed 7 kg. A little heavy for home repairs, but perfect for professionals. They will also enjoy three operating modes: chiselling, drilling and hammer drilling. In addition, the model can tighten screws, which is convenient if you don’t have the appropriate tool at hand.

The GBH 180-Li is chambered for SDS Plus, so if you have drills with a standard connector from other kits, they can be used with this device. Another bonus is the extra battery included. By charging both batteries at once, you can work continuously for up to 1.5 hours. Minuses? First of all, the price. Bosch is asking up to 10 thousand rubles for a model on the Russian market. For this money you can buy several rotary hammers from our rating.

Price: RUB 9,849

1. The concept of “perforator” and features of its design

A hammer drill is a working tool that, in addition to impact movements, also provides rotational torque. Its use allows you to quickly and easily make holes in both soft and very hard materials such as stone, concrete or brick. Rotary hammers can also be used to dismantle coatings made of hard materials or lay channels. There are various models of rotary hammers, which differ from each other in the presence or absence of certain functions. basic elements in their design , without which their work is impossible. The most important components of a rotary hammer are its engine , gearbox , impact mechanism and chuck .

The impact mechanism, which performs the main function of this device, can be
electro-pneumatic or crank . The first type works on the principle of converting the torque of the engine gear to a piston, which creates an oscillatory moment and compresses the air space between itself and the ram, causing it to repeat the vibrations, which, in turn, strikes the striker. This mechanism is equipped with a self-shutdown , which occurs when the tool does not touch the surface.
Unlike the first type, the crank impact mechanism does not convert rotational moment into oscillatory moment, but immediately transmits the blow to the piston, which in turn compresses the air space between itself and the ram and produces a blow to the striker.

The gearbox acts as a transmitter of torque from the engine gear to the chuck, thereby activating the impact mechanism. It consists of a set of different gears - bevel, spur and worm and, in most cases, has a constant number of transmission torques. chuck has a significant difference from the drill chuck. You know that the part of the drill bit that fits into the chuck is shaped like a cylinder, allowing the drill bit to turn with little resistance. The hammer drill chuck is designed in such a way that the drill must not only be inserted into the chuck, but also rotated into special grooves. This ensures reliable fixation even with great effort.

Many rotary hammers are additionally equipped with
a safety clutch , which serves to preserve the integrity of the tool and protect the person performing the work.
For example, if the hammer jams during operation, the clutch will stop the rotation of the chuck, thereby preventing the engine from burning out. Another useful feature is the anti-vibration system , which is a counterweight with a spring that absorbs a significant part of the vibration and dampens most of it. The body of the hammer drill is made of metal or impact-resistant plastic. But most often these two materials are combined. During prolonged use, the body becomes very hot, and the metal dissipates heat better and prevents the tool from overheating, while plastic inserts on the handle protect against burns.

The best networked hammer drills

Patriot RH 400

Semi-professional hammer drill for repair work. A fairly powerful model with an impact force of 9 J weighs only 6.3 kg, thanks to the magnesium gearbox. There are only two functions - drilling and chiseling, but if you have other tools in the house, the RH 400 can handle any task quite well.

A distinctive feature is the vibration damping system. Because of this, you can work with a heavy tool longer, without your hands getting tired from constant shaking. In addition, the handle is covered with a rubberized coating, which prevents your hands from slipping.

The manufacturer included a carrying case, a drill and a pair of chisels with a flat and sharp tip in the box with the device. Perhaps this will smooth out one of the few disadvantages of the device - the short (1.9 m) wire. For comfortable work, you will definitely have to buy an extension cord.

Price: ₽ 14,090

Makita HR2470X15

A convenient hammer drill for home repairs from a well-known brand. One of the obvious advantages is the long, 4-meter power cord. With such a length, you can safely work in small rooms, including under the ceiling. If the wire is not long enough, you can always use an extension cord. In addition, the manufacturer assures that the elements of the case and the inside of the device are protected from dust.

Makita engineers have seriously worked on the ergonomics of the device. Users note the good build quality and pleasant weight (only 3 kg!) in their hands. The handle does not slip in the hand even with gloves thanks to the rubber coating. The mode switch is conveniently located under the left hand. However, this option is not suitable for left-handers - the start button is on the right.

The package includes a special case for transportation with compartments for fasteners, drills and drills. For 8 thousand rubles - an excellent offer. Especially if you are not going to regularly tap walls or perform complex work on de-energized objects.

Price: RUB 7,565

Additional functions and cost of the tool

How it works and how to choose a current transformer

Basic movements are supplemented with rotational ones. In the appropriate mode, using the necessary nozzles, holes are drilled. Modern models are equipped with automatic locks, which prevent danger to the user when jammed. They also protect against damage. Reverse is useful for extracting the drill and in other difficult situations. Long work operations are performed without unnecessary stress if the start key is equipped with a special lock.

An alternative to a heavy gasoline unit is a portable hammer drill with a removable battery

It is clear that expanding functionality increases the cost of equipment. But these costs are offset by improved performance and additional amenities. However, with minimal requirements it is not difficult to find an appropriate option.

The best hammer drills with two operating modes

Rotary hammer Makita HR2300

Inexpensive (up to 8 thousand rubles) semi-professional device for working at heights. Light weight and ergonomics allow you to operate the device even when climbing to the very top of a stepladder.

The engineers thought about left-handed people and created a convenient system for controlling the drill's reverse motion. Now the reverse can be started and adjusted with one hand, and with the other hand you can hold the device itself by the handle.

The delivery set, in addition to the case without additional drills, includes an additional handle with a locking button. In addition, you can adjust the rotation speed of the drill to accurately drill holes in ceramics or other difficult surfaces. Due to its versatility and low price, the model is perfect for home use.

Price: ₽ 8,560

Interskol P-32/1000E

Domestic hammer drill with a vertically mounted motor. This simplifies the design and allows all components to be contained in a smaller housing. As a result, Interskol managed to make a semi-professional device weighing less than 6 kg.

Russian engineers also used an anti-vibration system and an additional handle to adjust the drilling depth. Thus, the tool has become even more convenient when performing work that requires accuracy and precision. Adjusting the rotation speed of the drill also serves these purposes.

The delivery set already includes the usual case, but the manufacturer was greedy and did not include additional drills in the kit. In addition, many may not like the 2 unfortunate meter long cord.

Price: RUB 7,850

And yet: a household model or a professional one?

More expensive and powerful professional devices are equipped with many functions. They are reliable and durable. It is easy to distinguish them: usually all manufacturers have models for professional use painted in a different color than household ones. Yes, and there are corresponding inscriptions on them. But their most important difference is the time of continuous operation, which lasts 7 - 8 hours, i.e. the entire working day. However, why would a “pro” need a heavy and bulky device at home? As a rule, there is no need to perform super-tasks, and for the most ordinary repairs or hanging shelves, a middle-class model is quite sufficient.

Let's list the optimal characteristics of a hammer drill that you plan to use for home needs. With similar parameters, you can easily and quickly drill holes in concrete with a diameter of 1.6 to 2.8 centimeters, as well as perform other types of work.

So, a good hammer drill has the following parameters:

• Power - from 0.5 to 0.9 kilowatts.
• The impact force is from 1.2 to 2.2 joules.
• There are three operating modes (except for drilling, also chiselling and drilling).
• Shaft rotation speed adjustment.
• There must be a protective coupling - it will protect the device from jamming.
• The drill must be fastened with the SDS plus system - there is no need to use keys to clamp or release the chuck.

Next, see for yourself - hold the tool in your hands, try to make a test hole. If you feel that it will be convenient to work, take it. Of course, the hammer drill must be suitable for your tasks. Just keep in mind that when performing these tasks, the device must be handled carefully. More on this below.

The best professional hammer drills for the job

Bison ZPV-32-1250 EVK

Inexpensive for a professional device (7-8 thousand rubles) model of domestic production. Supports three operating modes: can drill, chisel and drill. Thanks to a special damping mechanism, the device copes with vibration, which is especially noticeable when working with hard stone materials.

With a weight of 6 kg, ZPV-32-1250 has a small impact force of 3.5 J, which may not be enough for construction work. This is compensated by the motor power of 1250 W.

The delivery set is not rich: a carrying case, a depth gauge and lubricant. No additional drills, no second handle. The latter is not critical, because it can be purchased separately.

Price: RUB 7,510

Enkor PE-780/24ER SDS+

Lightweight professional model - only 3 kg. This is with an impact force of 3 J and a power of 750 W. Relatively low power narrows the field for the use of PE-780. Basically, a hammer drill is used as an additional tool for working at heights.

Additional advantages: a universal cartridge for the SDS Plus standard, three operating modes and a low price of 3.5 thousand rubles. The package includes nothing interesting: a carrying case, a depth gauge and an additional handle.

Price: RUB 3,367

The best manufacturing companies

The number of rotary hammer manufacturers is steadily increasing every year. But self-respecting professional craftsmen prefer a tool that has been tested in practice for years and has good reviews from its owners. The review presented below includes the most popular device manufacturers of 2016-2017.

1. It is a German company and a leader in the production of electrical equipment. Bosch tools have proven themselves to be highly reliable, functional and well-equipped. Prices for devices range from 5 to 90 thousand rubles.

2. Hitachi. A Japanese company whose production is located in China. This fact mainly affects the pricing policy. The tool can be purchased at prices ranging from 6 to 90 thousand rubles.

3. Country of origin: Japan. Thanks to the production of very high-quality tools, the Makita concern has conquered the markets of Europe, Asia, America and the Russian Federation. Price range from 6 to 87 thousand rubles.

4. Interskol is a manufacturer from Russia. In recent years, the company has gained a good reputation not only in neighboring countries, but also in the Middle East and Europe. Instrument prices range from 3 to 30 thousand rubles.

5. Bison Also a very well-known manufacturer from Russia, producing high-quality tools. You can buy a hammer drill at a price from 3.5 to 20 thousand rubles.

The best home hammer drills

Soyuz PES-25101

Another inexpensive model that will cost no more than 5 thousand rubles. PES-25101 can drill, drill and chisel holes with standard nozzles, since the device’s chuck is made to the SDS Plus standard.

The model weighs a little more than its competitor in the “Best Home Hammers” category – 4.9 kg. However, the device from Soyuz carries a powerful (1000 W) electric motor that can withstand even intensive drilling for a long time. Working with difficult surfaces is a little easier due to the impact force of 4 J, which is more than enough for home repairs.

At a low price, the manufacturer supplies a rich set of bonuses with the device. There is a carrying case, two drills, augers, and a depth gauge. The kit also includes an additional handle for a second hand, for maximum fixation of the device during operation. Minuses? Perhaps only a two-meter wire, which is not enough to work in apartments with high ceilings.

Price: ₽ 4,760

Bort BHD-800N-K

One of the cheapest models in our top - from 3 thousand rubles. The BDH-800N-K is also very lightweight, especially compared to professional devices. Weighing 2.85 kg, the device can operate in three modes: chiselling, drilling and hammer drilling.

With such dimensions, an impact force of 3 J does not seem insignificant. This power is more than enough for home repairs. When working with concrete or brick, you should be careful, as the drill can get stuck in the material. However, the motor rotates the drill in both directions and the stuck tool can be easily removed.

Along with the hammer drill, the manufacturer included a plastic case, a second handle and a drilling depth limiter in the box. In addition, the case already contains three concrete drills and two chisels of different shapes.

Price: RUB 3,263

What is the difference between a rotary hammer and an impact drill?

An electric hammer drill and a drill have one similar feature: the presence of an impact mechanism, that is, they have the ability to drill with a translational movement. The difference is that not all of them are suitable for working with concrete and masonry?

• Drills can make impacts using ratchet wheels that promote reciprocating movements inside the chuck.
• This results in minimal impact energy.
• To obtain results, you will have to exert a lot of physical strength when using a drill.

At the same time, a regular home hammer drill is much more effective at cutting stone and concrete. The reason is the improved impact mechanism.

An electric motor drives the shaft, where the oscillating cylinder bearing is fixed. It is in this cylinder that there is a layer of air separating the wall and the piston. On which the firing pin is attached, interacting with the equipment.

The best hammer drills for concrete

Hyundai H 900

An inexpensive and lightweight hammer drill from the famous Korean manufacturer. Excellent for any materials, it can work not only with concrete, but also with steel, wood, plastic and ceramics. In addition to the usual operating modes, the H 900 can replace a screwdriver, which is convenient if the necessary tool is not at hand or you work at heights.

The H 900 also features a convenient handle that can store additional bits and bits inside, which again helps when working at heights when you don't have your hands free. The delivery set at a price of 6,700 rubles is simply excellent. In a high-quality plastic Hyundai case they put an additional handle, a drilling depth limiter, 3 drills, a lance, a chisel and a replaceable key chuck. The device will most likely not be suitable for professional use, but for home use it is perfect.

Price: ₽ 6,700

Interskol P-22/620ER

Lightweight, easy-to-use concrete hammer drill. With a weight of 2.5 kg, it allows you to work with ceiling beams and elements at height. Low impact energy (2.2 J) should not confuse users: the power should be enough for all types of work.

The model supports two modes: drilling and hammer drilling. At the same time, the advantages include a rather powerful 620 W motor for such a weight. In addition, the P-22/620ER is equipped with a standard SDS Plus cartridge.

The model is designed for accurate gating of complex surfaces, since the high operating speed (up to 5060 strokes per minute) does not leave chips and cracks in the entry holes. The delivery set is standard: a case, an additional handle and a depth gauge.

Price: RUB 3,670

Additional options

The characteristics that have been described above are key. And in order to choose the right hammer drill, you need to pay attention to them. But there are also additional options that should be taken into account when purchasing a device, as they can significantly improve the usability.

1. Presence of reverse. This option is not required, but recommended. With its help, it is easier to pull the drill out of deep holes. To do this, just turn on the reverse rotation of the spindle of the device.
2. Jam protection. This function is very important if you have chosen a high-power unit. If the equipment gets jammed in the material being processed, a special coupling can prevent injury to the worker and burnout of the motor windings.
3. Speed ​​shifter. With its help, it is possible to regulate not only the spindle rotation speed, but also the impact frequency.
4. Smooth start avoids the tool jerking when starting.
5. Speed ​​stabilization system. This function maintains the spindle speed at the same level, regardless of the load on the tool.
6. The stop button for the switch allows you to lock the start button in the operating position, and further holding it with your finger is not required.
7. An anti-vibration system is important for a professional tool. Thanks to it, the master will feel significantly less vibration, which, as is known, affects not only muscle fatigue, but also human health in general.
8. A stop that allows you to control the drilling depth.
9. Availability of dust collector. A hammer drill with a dust collector allows the master to more comfortably perform the work of drilling walls, since this operation generates a lot of dust. The nozzles have a pipe for connecting a vacuum cleaner to them, and can have different designs.

Comparison table of the best rotary hammers

Name	Main characteristics	Price
DeWalt DCH	The battery is 3000 mAh, the force of the impact mechanism is 6.1 J, and there is a start button on the handle.	₽ 44 100
Bosch GBH	Battery capacity - 4000 mAh, ergonomic body, has a screwdriver function, SDS Plus cartridge type, has a second battery.	₽ 9849
Patriot RH	The device weighs little, vibration damping technology is implemented, there is a drill and a pair of chisels with a flat and sharp tip.	₽ 14 090
Makita HR	The length of the electrical cable is 4 meters, conveniently located switches, and comes with a transport case with compartments for fasteners, drills and drills.	₽ 7 590
Makita HR	The reverse is started with one hand; there is an additional handle with a locking button.	₽ 8 560
Interskol P-32	The motor is mounted vertically, equipped with an anti-vibration system, and has a speed control.	₽ 7 850
Bison ZPV	Full functionality (drilling, chiselling, drilling), there is an additional handle with a clamping clamp.	₽ 7 510
Enkor PE-78	The weight of the model is 3 kg, the impact is 3 J, there is a rubberized handle to reduce vibration.	₽ 3367
PES Union	A durable electric motor (power 1000W), there is a starter lock button and an additional rotary handle.	₽ 4760
Bort B.H.D.	Lightweight body, impact energy - 3 J, there is a case for transportation, a second handle and a drilling depth limiter.	₽ 3263
Hyundai H 900	A durable electric motor (power 800W), there is a starter lock button and an additional rotary handle.	₽ 6 700
Interskol P-22	Impact energy (2.2 J), speed control, all - 2.5 kg.	₽ 3670

4.Types by drive type

There are four main types of drives, each with its own advantages. The choice of drive must be made depending on the characteristics of the work performed.

• Gasoline drives will become indispensable if you are repairing the roadway , or doing work in open areas where there is no access to electricity. Such rotary hammers have an internal combustion engine, they have a very high impact force , and low fuel consumption allows work to be carried out within two hours from the moment the tank is filled. Along with the advantages, they also have a number of disadvantages : you will need a supply of fuel, you will not be able to regulate the impact force, which can cause unwanted destruction, they have a very large weight, dimensions and a very high price.
• Electric hammer drills are the most used in repair and construction work. The constant presence of a power source makes the operating time unlimited, they have good performance and sufficient power , are additionally equipped with an anti-vibration system, which greatly facilitates their use, mainly include three modes , have a rotation speed controller and an affordable price. disadvantages : the radius of your movements will be limited by the length of the power cord, of course there is an outlet in the form of an extension cord, but still if the voltage in the network is unstable, then the performance of the tool will be inconsistent, the clamping chuck will wear out during long-term use and extra expenses for buying a new one.
• Cordless hammer drills are very convenient in places where there is no access to electricity or when repairing the facades of a building, where you are unlikely to be able to reach with a power tool. They are light in weight and have a compact body, which makes them very convenient to use. Despite the use of a battery, they have a constant speed that can be adjusted and sufficient power that allows you to drill even concrete. The disadvantages include limited operating time, which directly depends on the battery capacity, the need for recharging, which requires a long time, which means you will not be able to use the tool immediately after it is discharged and stagnation occurs. Sometimes buying a new battery can be a daunting task, and if you accidentally drop such a tool, it will also fail.
• Pneumatic Hammer drills are mainly used in explosive areas, since the principle of their operation is based on the conversion of compressed air. They are lightweight, have a fairly high rotation speed and impact power. The disadvantages of such a tool are significant: for continuous operation you will need a compressor that will supply air. The movement area will be limited by the length of the hose connecting the compressor and the hammer drill, and most importantly, the high cost of such a tool.

Engine power and shaft speed

It is necessary to select equipment with the correct conclusions for each of the main parameters. Power consumption in itself is not a determining factor. Of significant importance are:

• drive transmission characteristics;
• cooling efficiency;
• duration of work cycles.

However, to create deep holes in concrete walls, it is recommended to purchase equipment with a powerful electric motor (0.8-1 kW). The shaft rotation speed, as noted in the previous section, performs auxiliary functions. A high value of the parameter accelerates the wear of individual components.

Prices

The price of such a tool directly depends on the scope of its application and technical characteristics:

1. Professional powerful models cost from 25 thousand rubles.
2. A hammer drill for household use will cost 1800-5000 rubles.
3. Battery-powered models cost 3500-4500 rubles.
4. Gasoline hammer drills cost between 25-65 thousand rubles.
5. Pneumatic models cost 47-95 thousand rubles.

Hammer hammer impact force in joules (J)

The engine power also determines the impact force of the hammer drill. The dependence in the model series can be traced very clearly, although it is not directly proportional. In rotary hammers from different manufacturers with the same engine power, the impact power can differ significantly. For “light” hammer drills, the impact force ranges from 2.0 to 4.0 J.

unit of work joule

The optimal impact force for household hammer drills, which will allow you to work with hard surfaces without extra effort, is around 3.0 J. This force is produced by a hammer drill with an engine power of about 800.0-900.0 W. Lower-power hammer drills provide a force of 1.5-2.5 J, which allows you to satisfy basic needs, for example, drilling a hole in a brick or cinder block.

In “average” hammer drills, the impact force ranges from 3.0 to 10.0 Joules, while most models on the market have a power of 5-6 Joules. A force of 5-6 J makes it possible to work with hard surfaces (concrete, granite, etc.) without unnecessary effort and perform: drilling with a diameter of up to 40.0 millimeters; gating of walls and ceilings and other similar works.

High power (large) hammer drills have an impact force of up to 20.0 Joules. They can be used not only for drilling surfaces with a diameter of up to 50-60 millimeters, but also as a jackhammer for dismantling old buildings, paths and other purposes. Separately, it is worth noting in this section rotary hammers with an electromagnetic impact principle. Such hammer drills have an impact force reaching 30.0 Joules with an engine power of 1500.0 to 2000. Watts. A hammer drill with an electromagnetic impact principle can be the best way out of the situation if the power of a classic pneumatic hammer is not enough for you.

Engine location: vertical or horizontal

Typically, hammer drills of the “light” category (in terms of weight and power consumption) are created with a horizontal mount of the power unit. Such designs include semi-professional and household models. They are convenient for performing work operations in hard-to-reach and narrow places. The relative compactness is useful for transportation and storage.

The vertical option provides better conditions for effective cooling of the motor windings. This technique is well suited for performing large volumes of work. A special drive transition mechanism better protects the rotor from impacts, which extends the life of the powerful hammer drill. An additional advantage is the large amplitude of the piston, which is provided by the combination of components of the crank assembly.

Chuck type and drill diameter

Crowns, strobers and other replacement tools for hammer drills are created with longitudinal grooves on the parts intended for fastening. These recesses provide a certain degree of freedom in the longitudinal direction. At the same time, fixation is improved, preventing rotation. Such products are used in combination with special cartridges (SDS series).

Keyless chuck

Some models provide for quick replacement of mounting blocks. Make sure that the hammer drill can be equipped with a standard drill chuck. Separately check the compatibility of the diameter of the nozzles and the clamp.