In many houses and apartments, the ceilings and walls are made of brick or concrete. The ordinary household drill cannot drill a brick and concrete. When such a need arises, use another tool - a perforator. With it, you can make a hole even in a very dense material. To date, the range of manufacturers presents a huge selection of perforators. To choose the right tool, you need to pay attention to its power. However, the power punch - this is not the only characteristic that needs to be considered. First of all, it is necessary to consider the structural features of this tool.
Diagram of the device punch.
Structural features of the punch
The main characteristics of any punch - is the force of impact and power. The higher the power and impact force, the greater the number of tasks that can be accomplished with a perforator. However, it is important to know that the impact force is far from being proportional to power in all models. This is primarily due to the design features of the punch.
The perforator can be equipped with a quick-clamping or ordinary chuck. The most optimal, both for use at home and for professional use, is a punch with a keyless chuck. Such an element of construction will allow to change the drills with little effort and special tools.
Another important feature for the user is the weight of the punch. According to this indicator, power tools are divided into:
- Lungs. They weigh up to 4 kilograms. The maximum power of such models does not exceed 700 watts.
- Average. The weight of representatives of this category can reach 5-8 kg. Power - from 700 to 1500 watts.
- Heavy. A punch from this category will weigh more than 8 kilograms. Its power may be more than 1500 watts.
Description of knots punch.
Lightweight power tools work with SDS-plus cartridges. Such cartridges are designed to work with drills with a diameter of not more than 26 mm. Heavy models are equipped with SDS-max cartridges and allow you to work with drills up to 6 cm in diameter without any problems. Medium punchers can be equipped with both SDS-plus cartridges and products of the SDS-max class.
Not so long ago, SDS-top cartridges appeared on the market. They are designed to work with drills with a diameter of 16-25 mm. Such models have not yet received special distribution, but maybe this particular perforator will suit you. As with almost all power tools, the perforator can work from the mains and the battery. A cordless punch will cost much more than a “classic” one. Therefore, you need to think about how often you will work in those places where you can not stretch the carrier, and whether there is a point in overpaying for an unnecessary function.
Pay attention to the punch equipment element, such as electronic adjustment of the rotation speed. The presence of this option will allow you to set the most appropriate frequency of rotation of the drill, taking into account such moments as its size, the current load on the tool, etc. Electronic adjustment allows you to perform work in higher quality and extend the service life of the punch. Currently, electronic adjustment is not unusual. This is practically a standard feature available on most models.
Heavy drills are for the most part tools designed for professional use. A middle class model will be enough for housework.Back to table of contents
The choice of the optimal power punch
Electrical circuit punch.
When choosing a punch, it is necessary to take into account such an important characteristic of this tool as power. Today, manufacturers offer the broadest selection of power tools, so that you can easily buy a hammer drill, the power of which will be enough for you. There is no standardized classification of power tools. The classification is very conditional. Depending on the power, perforators can be divided into 4 main groups.
The first group includes low power tools. Usually it does not exceed 700-800 watts. The weight of such tools is up to 3-4 kilograms, and the force of impact in most cases does not exceed 3 J. A perforator with such characteristics will allow making holes with a diameter of no more than 26 mm.
The second group consists of tools with slightly more power, usually up to 1000 watts. They already have a more substantial weight, about 5 kilograms, and, of course, the impact force is from 4 to 8 J. With a tool of such power you can make holes with a diameter of no more than 34 mm.
The third group presents the average power tools, up to 1300 watts. They weigh already about 8 kg, and the force of impact of such a perforator, depending on the specific model, can reach 13 J. Allow to prepare holes with a diameter up to 45 mm.
Scheme of removal of the lever.
And in the fourth group are the most powerful drills, more than 1300 watts. Weigh an average of more than 10 kg and have a blow force of about 20 J. With such a power tool you can make holes with a diameter of up to 60 mm.
When choosing a tool such as a punch, pay attention not only to the declared power. It is necessary to take into account the frequency with which and under what conditions it will be used. For example, if you need to drill relatively small holes, i.e. with a diameter of about 16-20 mm, but there will be many of them, then the tool of the first group will not suit you, although its characteristics are suitable. Such tools are designed for infrequent use. When preparing a large number of holes they overheat. If the punch will be used quite rarely, you can get by with a low-power model. To spend money on the purchase of a punch with higher performance does not make sense.
Popular brands of perforators.
Based on this information, we can draw the following conclusions:
- The tools of the first group are best used for mounting various cables and preparing non-through holes of about 6-8 mm in diameter.
- Perforators of the second group can not only make grooves for cables and blind holes, but also drill through the partitions. The diameter of the holes is limited to 10-12 mm.
- The third and fourth group are professional tools with which you can drill through the main walls and floors.
Of course, the power of this power tool is one of the most important parameters, but an experienced builder will never choose a hammer drill solely in power. He will certainly turn his attention to other characteristics, in particular, to the modes of operation.Back to table of contents
What modes of punch are there?
Three modes of punch.
Power tools may have different functionality. Depending on this, all available models can be divided into several types:
- dual mode;
- single mode.
Single-mode devices include highly specialized professional tools. The design of such models is very simple, but using them for home repairs will not work, due to limited functionality. Allow to perform drilling with a blow. Those models that are able to work exclusively in the blow mode are called jackhammers.
More familiar to ordinary users are the dual-mode tools. They can operate in impact and drilling mode. A three-mode drills support all the above modes.
You need to know what this or that mode is for and take this information into account when choosing a tool. So, the drilling mode is designed to work with wood and metal, drilling with a blow will allow you to make holes in brick and concrete, and the impact mode can be used, for example, to remove tiles and other tasks. Before you buy any particular model, be sure to study its functionality. Practice shows that in home repair from time to time there is a need to use each of the three modes.Back to table of contents
What does the impact force indicate?
It is possible to divide all available models into several types: three-mode, two-mode, single-mode.
This is one of the most important parameters of such tools. This characteristic reflects the energy of the interaction of the unit with the treated surface. The speed and efficiency of work directly depends on it. As noted, the impact force in joules is measured.
It is important to take into account both the impact force and the power of the tool, since these are two interrelated characteristics. For example, a small punch with a capacity of 750 W and a blow force of about 3 J is unlikely to make a hole with a diameter of more than 26 mm. Along with this, a tool with a power of 1500 W and an impact force of about 20 J can already be used to create holes in the concrete and brick surfaces with a diameter of about 52 mm.
For home use, in most cases, a 3-5 blow force is enough.Back to table of contents
Should I pay attention to the type of cartridge?
With the help of the chuck, the working nozzle is attached to the punch. Chisels, drills, crowns, drills, etc. are used as working tips. The type of chuck depends on how large the diameter of the working tools can be used in a set with a specific punch.
Earlier it was reported that the tools are most often equipped with cartridges such as SDS-plus and SDS-max. Before buying a particular model, think carefully about what holes you most often have to do. Professionals recommend buying units with SDS-max cartridges, but it all depends on the particular case.Back to table of contents
Shock and rotation frequency
Scheme of the device of the professional perforator.
These parameters are also among the main characteristics of the considered power tools, indicate how much translational and rotational movements makes the working element of the unit for some unit of time.
On the market are models whose rotational speed ranges from 230 to 2300 revolutions per minute. At the same time, compact models for home use have a higher rotational speed than those used for professional tasks.
The speed of strikes also varies within fairly wide limits, on average from 2,150 to 5,800 beats per minute. If the tool will be mainly used for home repair, it is enough to purchase a unit with a frequency of impacts of about 4500 beats per minute and rotational speed at the level of 1000-1500 rev / min. If you need to perform tasks at a more serious level, look at the tools with the appropriate indicators.Back to table of contents
Weight and various additional features
When choosing a punch, you need to pay attention to such an important point as its weight. From this depends directly on how conveniently you will work with the unit and how long you can do it without rest.
Depending on the specifications, the punch can weigh an average of 2 to 12 kilograms. For household use, a tool weighing 3–4 kg is best suited.
In addition to the standard functionality, the tool can be equipped with additional options that significantly expand its capabilities and make working with it more convenient. For example, if the perforator is equipped with a reverse mode, this will allow it to be used as a screwdriver. The same mode will allow “freeing” the tool if it gets stuck during operation.
The soft start function prevents chaotic oscillations of the tool immediately after switching on. If the unit will have a stopper, you do not have to constantly press the corresponding button during operation. More expensive tools are equipped with a vibration and noise suppression system, an insulated metal housing, two-speed gearboxes, etc.
The puncher scheme with the reverse mode.
In addition to those listed above, the following additional options are most common:
- Speed control function. Allows you to set the speed of the punch, which is best suited for a specific task.
- Reverse. With it, you can scroll the torque element in the opposite direction, which will allow you to pull out the drill without much difficulty.
- Protective coupling. It prevents the drill from sticking, thus protecting the engine and the user. At present, almost all models of perforators are equipped with protective clutches, however, it is still necessary to additionally check its presence.
- Vario-lock function. Thanks to this system, the user can change the angle of the working plane of the punch, which will facilitate the implementation of certain tasks.
Each of these options makes the tool more convenient and functional, but at the same time increases the value of the tool, which for many buyers is a determining factor. The price of the instrument depends on its power and other main characteristics, a set of additional functionality, the quality of components and the scope of delivery.
For household use, buying a very powerful and too heavy tool is not necessary. Most tasks are successfully handled by middle-class perforators. Professionals are advised to pay attention to more productive machines with a sufficient set of additional options. It will be a big plus if the manufacturer provides a set of drills in the delivery set.
Thus, it is possible to wage a long debate about which punch is better, how powerful it should be, and what functions are necessary for work. It is important to understand that a good punch does not have to have a dozen additional functions and is too expensive. The main thing is that he flawlessly performs what is required of him, and be the best for you. Have a good choice!