Perforator complete set
And now let’s talk about the complete set of the perforator. the more complete it is, the fewer devices you will have to buy later. So, what should be in the case along with the device:
Spare brushes for the electric motor.
The special chuck, which is an adapter, will help you use conventional drill bits rather than keyless bits. After all, perforating drills are more expensive, and in the absence of such a cartridge, you will have to spend a lot.
Boers are the main kit. For domestic needs it is more than enough, but professional models need a more impressive set.
Rotary hammer power
Hammer drills are less powerful than electric drills. This is because drilling is much harder than drilling. Therefore, the punch shaft during operation does not require such a high rotation speed as that of a drill. For devices with different types of cartridges, the power is different. Models with SDS-Plus cartridges consume 400 to 800 watts. Rotary hammers with SDS-Max cartridges have a capacity ranging from 1 to 1.2 kilowatts. In fact, when choosing this tool, you should not focus on power. this is not the most important parameter.
An impact drill and hammer drill are not the same thing
Some people mistakenly believe that a hammer drill works the same way as a hammer drill. But this is not so. although such a drill is called a “hammer drill“, the principle of operation of these two electric tools is strikingly different. Yes, they both punch holes, but the blows have different strengths, as well as different origins.
The hammer drill works as a punch through the gearing of two wheels called ratchets. At a certain pressure on the drill, an oscillatory movement of its axis occurs, which allows you to make a hole. But the performance cannot be high, and the blows are rather weak. Therefore, hard concrete, for example, cannot be pierced with such a drill.
But the hammer drill is just intended for drilling stone, brick and concrete. It also allows you to transfer force to the working edge of a lance, blade or drill, allowing these tools to work with maximum efficiency.
The hammer drill uses an electromechanical or electro-pneumatic type mechanism as the main structural element. Thanks to it, an impact force is created that is sufficient to punch through concrete or stone. In this case, the master does not need to press hard on the handle of the puncher. Some models have a mechanical percussion mechanism similar to that of a drill, but it is less durable than an electromagnetic or pneumatic mechanism.
The piston and the mechanism of the pneumatic impact system, as a rule, are equipped with L-shaped rock drills.
Mechanism type “drunk” a bearing that rotates makes the firing pin strike, such a mechanism is equipped with narrow rock drills.
So, if you compare the mechanical and pneumatic mechanisms, you can see that the latter greatly facilitates work on a hard surface. When using a mechanical percussion device, three times more force is required than when using a pneumatic device. When choosing a hammer drill for home, it is better to pay attention to more modern models, and safely forget about mechanical ones.
The following functions can be built into the hammer drill:
- Drill depth gauge helps you know if the drill has reached the correct mark.
- The gearshift mechanism comes in handy when you need to switch from drill to drill or vice versa. Because they have to move at different speeds.
- Reverse rotation of the shaft will help out when the drill gets stuck in any surface.
- A soft start and a device that protects against overheating will help to avoid troubles that promise a breakdown of the device.
- Stabilization of the shaft speed during fluctuations in the load force is a very useful function.
Spindle speed
The rotational speed of the punch shaft is lower than that of the drill. this has already been mentioned above. Depending on the class of the device, the value of this value can be from 600 to 1500 rpm. The rotational speed decreases with increasing power and productivity of the rock drill. this is due to its design features. Indeed, for productive models, the optimal tooling diameter is quite large. In general, the shaft of the device rotates only in order to remove dust after drilling. A small drill has to rotate faster, and a large one. slower, otherwise it will wear out too quickly.
Models of rock drills with high shaft rotation speed are heavy, which does not facilitate ease of use. In addition, such high-speed devices wear out the spiral grooves very quickly, with the help of which the drilling waste is removed from the place of work. Because of this, the device begins to heat up quite a lot, and as a result, it can even jam in the hole.
Rotary hammer shape
In terms of shape, perforators are both straight and L-shaped. In the latter, the motor is located vertically, making the device more compact. In addition, the engine is cooled efficiently. Such devices can work for a long time without overheating, and they serve a lot. But their weight is very noticeable.
L. Rotary Hammer, Vertical Motor.
Narrow and long straight type perforators weigh less, and due to their design, they will crawl into any gap. The engine is placed horizontally in them.
Narrow, long rock drill, engine horizontal.
What to consider when choosing a hammer drill
This tool can be: with one drilling mode, with two modes (drilling plus hammering), as well as with three modes (chiselling is added to the previous two modes). In addition, rock drills are classified by weight into heavy, medium and light. The latter will not be heavier than 4 kilograms, the average will “pull” from 4 to 5 kilograms, and the heaviest devices of this type can weigh 5-10 kilograms or more.
Impact energy
Impact energy is one of the main parameters of the device. Joules are used to measure it. Lightweight models have an impact force of no more than 1–2 joules, while “heavier” punches can hit with a force of 8 to 15 joules. The greater the impact energy, the larger the hole diameter can be obtained. When this value is small enough, the device does not work more efficiently than an impact drill. In this case, he will not punch a hole, but drill it. As a result, its equipment will wear out extremely quickly, and you will not have to dream of high performance.
You should be aware that a value of this parameter exceeding 10 joules will lead to rapid failure of your instrument. Indeed, under such high loads, its refractory inserts will collapse in a very short period of time.
If you need a hammer drill for drilling small holes for dowels and anchor bolts, then see compact models of devices with an impact energy of 1.2 J:
If, in addition to drilling holes for a dowel, it is necessary to perform: chipping, cutting out socket boxes, drilling large-diameter holes, choose medium-power devices with an impact energy of 5.8 J:
If a hammer drill is necessary for dismantling walls and punching passages, then look at powerful devices with the SDS MAX system and an impact energy of 10 J or more:
What is the difference between a drill and a hammer drill and vice versa
The hammer drill is characterized by a longitudinal axial movement of the working part, similar to an impact drill. Therefore, hammer drills are confused with a heavy drill. In words, there is practically no difference, however, the hammer drill functions on the basis of pneumatics, and any impact (heavy) drill works thanks to mechanics.
We come to the conclusion that the hammer drill should be larger and more massive than a drill with an impact function.
How to choose a puncher for personal use?
Several decades ago, only powerful electric drills equipped with drills for metal and concrete were used in everyday life. A truly branded, specialized tool was sold only abroad, you could not just go to a construction supermarket and choose a suitable device.
The device and characteristics of the punch
All punchers are divided into three types in terms of functionality:
- Single-mode. Impact drilling function only. Most often, such perforators are not used in everyday life, but are used as professional additional equipment for narrow purposes.
- Dual mode. Hammer drilling plus classic drilling or chiseling only.
- Three-mode. The tool is equipped with all the functions specified in paragraphs 1 and 2.
The choice of a hammer drill is based primarily on the characteristics of power and impact force. The higher these figures, the better the hammer to be fitted.
The impact force of the tool is sometimes not proportional to the power due to design features.
Types of working chuck for rotary hammer:
- usual;
- quick-clamping.
Which drill chuck to choose? For household or household chores, the keyless keyless model is best suited. Changing the nozzle in this version is convenient, easy and quick.
Rock drill classification by weight:
- Lungs. Up to 4 kilograms. Power is no more than 700 watts. Only have SDS-plus chuck for 26 mm drill bits.
- Average. 4 to 8 kilograms. Power from 700 to 1500 watts. Depending on the equipment, both SDS-plus and SDS-max are equipped.
- Heavy. than 8 kilograms. Power is over 1500 watts. Equipped only with SDS-max chuck for diameters up to 60 mm.
Bosch equips its latest rock drills with SDS-top chucks for diameters from 16 to 25 mm.
Energy and frequency of impacts
For a hammer drill, the impact function, measured in joules, is very important. The performance of the device, as well as the diameter of the hole to be machined, depends on the impact energy. For daily work with a hammer drill, this is one of the most important indicators.
It is essential that an impact drill at the “maximum” will very quickly deplete its resource, and with a hammer drill they perform this work for a long time without wear, especially with a single-mode model.
The frequency of impacts also affects the speed of the tool. The more often the piston of the perforator strikes the working element, the faster the hole is punched.
It turns out that energy and frequency determine the level of performance. When choosing a perforator yourself, you need to evaluate the amount of work on chiselling, then, according to the specified characteristics of the impact frequency, calculate the approximate productivity.
How to choose a hammer drill for home
The best way to start the selection is to build on weight and power. Super-productive models for the home will definitely not be needed.
Domestic rotary hammers are mid-range tools in cost, power and weight.
Suitable criteria for home conditions and the following brands:
- Power from 600 to 900 watts.
- Shock 1.2 to 2.2 J.
- Three-mode medium punch. Drilling, hammer drilling, non-rotating impact.
- The rotation speed is necessarily regulated.
- Anti-jamming clutch.
- Keyless chuck.
- Replacement branded cartridge included.
According to these characteristics, three leading brands are distinguished:
- Makita. Sufficiently lightweight drills and hammer drills, with a warranty of several years. They have established themselves as tools for everyday household work, easy repairs. Average market price available, easy to operate. How to choose a hammer drill for home is this brand? Users refer to the Makita RK 2450 model. The required (useful) power is 700 watts, a shock of 3 joules, revolutions up to 4.5 thousand.
- Bosch. German quality and assembly. Leading edge in professional power tools and household equipment. Any models have been tested by time and weather conditions. Rotary hammers are equipped with the function of precise adjustment of the nozzle speed (drill, drill). When purchasing equipment from this manufacturer, pay attention to the color of the case. Blue classifies precisely the professional purpose. The most popular model is Bosch GBH 2-24 DF. 790 watts, 2.7 joule impact, complete with SDS-plus interchangeable chuck and classic keyless chuck.
- Hitachi. The best tool in our market from Japan. Priced in the same category as the Makita, but some power tools, including rotary hammers, are lighter in weight. Are you wondering which hammer drill to choose from this manufacturer? Pay attention to the Hitachi DH 22 PG, 620 watts, 1.4 joules of impact and weighing only 1.9 kilograms.
You do not need to trust a consultant in the selection of a perforator, or any other technique. The maximum is to listen to recommendations. You need to choose and buy a model that best suits your personal requirements.
How to choose a good and inexpensive hammer drill for your home
Drilling a concrete wall is not an easy task. Many, probably, tried to solve this problem, so to speak, “with little blood”, using a conventional drill and drill for working on concrete. It is unlikely that the process left fond memories. Especially if it was necessary to drill solid concrete walls or ceilings. That is why, if you have serious repairs ahead, you should think about purchasing a hammer drill. It will save you a lot of time and effort.
In the modern market for construction tools, there is a fairly large selection of various power tools, including rotary hammers. Let’s try to understand this variety of tools and figure out how to choose a good and inexpensive hammer drill for home.
Let’s see first what tools are offered for drilling holes in concrete. You will most likely be offered a hammer drill and hammer drill. The difference between the two tools is that the hammer drill drills by rotating. The blow plays a supporting role. In the hammer drill, on the contrary, the blow plays the main role. This allows you to successfully drill much denser and harder materials. over, if you need to drill holes in reinforced concrete structures, the hammer drill may not be considered due to its low efficiency. After all, the drill is intended for conventional drilling, and hammer drilling is just an auxiliary function. Therefore, we will figure out how to choose a puncher.
There are two types of hammer drills on sale. professional and amateur. We will not consider a professional tool, it is quite expensive and there is no point in buying it for occasional home use.
One of the main parameters of a rock drill is its power. On sale you can find tools of different capacities, from 450 watts to 2 kilowatts. Above 900 watts, professional instruments usually start, although powerful amateur ones are also found. If you do not plan to regularly drill thick reinforced concrete walls, then a 600-900 watt tool is enough for you. Usually, as the power increases, so does the weight of the rock drill. For drilling holes in the ceiling, for example, it will be much more convenient to work with a light, even less powerful tool. Perforators are available in one, two and three modes. The single-mode hammer drill only drills. The dual-mode hammer drill supports hammer drilling in addition to conventional drilling. The three-mode can also work like a regular drill, for this it is enough to use a special adapter and install a regular drill. Ideal for home use is a lightweight three-mode medium power rotary hammer.
Having roughly decided on the type and parameters of the tool, it’s time to go to choose a hammer drill. What you should pay attention to first of all:
DEWALT D25761K
Average
Tool weighing 9.9 kilograms and 1500 W with SDSMAX chuck. Maximum drilling in concrete. 52 mm. The maximum number of revolutions per minute. 250, impacts. 2300. The impact force reaches 15.5 J.
The best professional model designed for chiselling. The hammer drill is dimensional, but it has a very strong impact, which instantly copes with any surface. With drilling, the situation is much worse. To the advantages of the model, buyers include the presence of a safety clutch and electronic speed control.
- Very strong blow.
- Anti-vibration.
- Thoughtful safety.
Dewalt D25601 K
Average
The professional tool weighs 6.8 kilograms, has a power of 1250 W and supports the SDS MAX chuck. The maximum drilling diameter in concrete is 45 mm. In the chiseling mode, it shows an indicator of 2840 beats / min, drilling. 415 rpm. Impact force is 8 J.
Another chiseling machine. But this device can also be used as a drilling tool, as it works in 3 modes. The device is quiet and handles concrete easily. The undeniable advantage of the model is the build quality.
- Comfortable to hold in hand.
- Versatility.
- Low noise level.
- Good build.
- There is no protection against blocking the drill.
Bort BHD-18X-BLK Li-Ion 18 V (1.7 J)
Rating: 4.5
- operating modes: drilling, drilling with chiseling
- SDS-Plus cartridge
- reverse mode
- number of batteries included: 2
- weight 2.6 kg
Average price: 13 990 rub
Compact hammer drill with drilling and hammer drilling modes, designed for simple work on dismantling and drilling of brick, concrete, stone. The optimized brushless electric motor directs almost all the energy to the working tool and is highly reliable. The absence of brushes minimizes maintenance costs. Illuminates the drilling area and adjusts RPM to match the material.
- instant engine stop;
- reverse and brushless motor;
- speed regulator;
- drilling with and without hammering.
Bosch GBH 180-LI 4.0 Ah х1 case Li-Ion 18 V (2 J)
Rating: 4.8
- operating modes: drilling, chiseling, drilling with chiseling
- SDS-Plus cartridge
- reverse mode
- weight 2.3 kg
- cordless rotary hammer
Average price: 14 033 rub
Portable rotary hammer with a capacious battery, which is not inferior to networked household devices. When using an impact drill in concrete, it will make a hole with a diameter of up to 20 mm, it is capable of chipping off a concrete or brick ledge. Drills wood with a diameter of up to 40 mm. enough for laying inch pipes and metal. up to 13 mm. Ease of service is achieved by replaceable carbon brushes. Low weight allows vertical and overhead drilling. LED illumination will illuminate the work area in a niche and other hard-to-reach places.
- dust bag;
- reverse and speed control;
- automatic shutdown in case of jamming;
- roomy suitcase.
top 3 best hammer drill machine in Hindi
Metabo KHA 18 LTX 3.5Ah x1 box Li-Ion 18 V (2.2 J)
Rating: 4.7
- operating modes: drilling, chiseling, drilling with chiseling
- SDS-Plus cartridge
- reverse mode
- number of batteries included: 1
- case included
- weight 2.9 kg
Average price: 12 499 rub
A combination tool capable of drilling holes in concrete, dismantling old tiles and cleaning up a gutter. The electronics adjust the speed according to the material being processed. The safety clutch cuts off the power in the event of a jammed rig. Batteries with capacity indication notify when recharging is required. LED illumination serves to illuminate the workplace.
- inconvenient battery change system;
- support for Ultra-M technology;
- battery capacity indication;
- illumination of the working area;
- auto power off when jammed.
DeWALT DCH274P2. BRUSHLESS HAMMER
Rating: 4.9
- operating modes: drilling, chiselling
- SDS-Plus cartridge
- reverse mode
- number of batteries included: 2
- case included
- weight 3.3 kg
Average price: 46 890 rub
A versatile assistant capable of making wall openings made of brick, stone, concrete and wood. Equipped with SDS-Plus quick release and three-jaw chucks for receiving tools with cylindrical and hexagonal ends. The capacity of the battery is sufficient for making 90 x 10 mm holes in concrete with a depth of 80 mm. The brushless design of the electric motor increases the autonomy and reliability of the tool. The backlight will make it easier to work with a lack of light:
- Neon lights;
- vibration reduced to 2.5 m / s 2;
- quick-detachable cartridges;
- electronics stabilize the speed under load;
- brushless motor.
The best rotary hammers for home price-quality
A household punch is one of the most necessary tools in the house, it is capable of dismantling old tiles, chipping off plaster, drilling holes for fasteners and socket outlets.