Quite often to make holes in the ceiling for fastening the eaves either in the wall for hanging the shelf can be possible only with a perforator, since the reinforced concrete slabs percussion drill will simply do not take. However, to choose a perforator with the functions necessary for performing certain purposes. It is quite difficult for functions, especially not knowing the perforator device and its most important characteristics.

Perforator device

The perforator is a building tool that is an integral assistant during repair, construction and even when performing some household work.

Of the variety of manufacturers presented in the market, Bosch perforators are most popular.

The design of the perforator is represented by a rather complex system, composite elements of which to some extent affect the performance of the tool.

Engine

Material models of perforators are equipped with motors of various sizes and rated power. In this case, the size and power of the engine are directly proportional to the values \u200b\u200bthat directly affect the formation of the weight of the perforator. Based on these indicators, the perforators are divided into:

• light (up to 4 kg) - equipped with low-power engines in the range of 400-700 W. Such perforates can operate in 3 modes and are more used in everyday life;

• average (5-8 kg) - differ in the average power of the engine, which is 800-1200 W. Medium weight perforators are deprived of drilling functions and allow you to use only 2 impact modes, so more often used for professional work, rather than in everyday life;

• heavy (over 8 kg) - high-power engines ranged from 1200-1500 watts. Heavy perforators operate in 2 modes, without drilling function, and belong solely to a professional tool.

Thus, the greater the engine power and the weight of the perforator, the greater the performance has this construction tool.

Impact mechanism

The blowing force of the perforator depends not only on the power of the engine, but also from the shock mechanism.

Based on the principle of impact, the mechanism is 2 types:

1. Electromagnetic. The punch is made as a result of the interaction of 2 electromagnetic coils, providing a reciprocating course of the core, which transmits the shock mass into the ends of the bora.

Pluses of an electromagnetic mechanism:

• the efficiency of work does not depend on the ambient temperature;
• reduction of internal losses by 25%;
• lack of driving elements;
• simplicity of service, as well as operation;
• acceptable cost;
• durability.

Minuses:

• in the process of functioning there is significant vibration;
• limited shock force;
• high noise during operation.

Due to the significant deficiencies, Bosch's branded perforators with an electromagnetic impact mechanism are not issued, but the fake under the branded perforator may well be equipped with an electromagnetic type system.

2. Pneumatic. The blow occurs under the influence of compression formed by the return-translational movements of the piston inside the cylinder, as a result of which the batter strikes the burah.

The pneumatic system can function using:

• a crank-connecting mechanism used in a professional instrument;

• swinging bearing included in the package of domestic tools and, partly, professional destination.

Pluses of the shock mechanism of a pneumatic type:

• high impact rate;
• long operational tool period.

Minuses:

• increased electricity consumption;
• the need for preheating idling;
• higher cost.

The use of a pneumatic mechanism in the perforator device helps to obtain greater impact energy than using the electromagnetic scheme. In this case, the engine power may be minimal.

Reducer

Some perforator models (for example, Bosch PBH 3000-2) are equipped with a two-speed gearbox that allows you to increase the number of rolver shaft 2 times, and without reducing performance.

Cartridge

For attaching a drill to the perforator, the cartridges of the SDS system are used, contributing to the rapid change of nozzles and prevent the drilling of the bera. To date, the cartridges of the following system standards are issued:

• SDS-PLUS is used to fasten nozzles with a diameter of a shank 10 mm and the presence of 4 grooves, 2 of which are open, and 2 closed. At the same time, the open grooves serve as guides to insert a boraxy, and closed - for the bora's stopper through lock balls. The SDS-PLUS system cartridge is used in lung models and some of the middle class for attaching a bead that allows you to drill a hole with a diameter of up to 26 mm;

• SDS-MAX is characterized by a diameter of a shank 18 mm, as well as the presence of 2 closed and 3 open grooves. The patron of the SDS-MAX system is equipped with professional perforators for attaching a drill with a working diameter of more than 20 mm;

• SDS-TOP - based on SDS-Plus, being a transitional element to the SDS-MAX system, which allows the use of nozzles with a diameter of a 14 mm shank. At the same time, the driving diameter varies in the range of 16-25 mm;

• the quick-mode cartridge is used in domestic, as well as professional perforators for drilling holes and allows you to install standard cylindrical drills.

Safety clutch

As a rule, the kinematic diagram of the Bosch perforator contains a protective coupling, stopping the rotation of the perforator at the time of the boraxy wedge in the hole. Thus, the presence of a coupling allows you to avoid damage to the perforator, as well as its user.

Types of perforators, their characteristics

The range of models manufactured by Bosch is quite diverse. However, by appointment, perforators are divided into just 2 types:

1. Professional - characterized by the vertical location of the high power engine capable of withstanding long loads. In addition, Bosch Professional perforators are equipped with an impact device of a pneumatic type in combination with a crank-connecting mechanism, which increases the amplitude of the movement of the piston and, accordingly, the brisk. Professional perforators are highlighted in the blue body of the case and the presence of a number of additional functions that facilitate the operation of the user during the period of intensive load.

Advantages:

• significant power supply;
• engine cooling efficiency;
• equipment of complex electronics;
• increased piston stroke;
• minor shock vibration;
• durability.

Disadvantages:

• the weight and dimensions of the perforator limit work in hard-to-reach places;
• high price.

2. Household, differ from professional perforators with green body and horizontal arrangement of the engine of low power. The drum structure of household perforators is represented by a pneumatic mechanism in combination with the swinging bearing. At the same time, the performance of household perforators is not very high, although it is quite suitable for repair work on the house.

Advantages:

• compactness;
• ease of work in hard-to-reach places;
• low weight;
• acceptable cost.

Disadvantages:

• high impact return on the engine;
• limited set of functions;
• bad engine cooling conditions;
• the relatively low operating period.

Depending on the type of drive, the perforators are divided:

• electrical - function from a network with a voltage of 220 V. However, high-power perforators may well serve as the damned plugs and fuses;

• rechargeable. As a power source, the battery is the battery, which can be attached to the perforator housing or to the user belt. In this case, the remote battery is attached to the perforator by cable. Bosch rechargeable perforators are equipped with lithium-ion batteries or nickel-cadmium. At the same time, the lithium-ion battery in many criteria is superior to nickel-cadmium. Battery perforators turn out to be indispensable in places located in removal from the mains or in de-energized premises for one reason or another.

Before you buy a BOSCH battery type perforator, it is necessary to pay special attention to the battery, the main characteristic of which is power and voltage, since with an equal capacity of batteries, the perforator will work longer from the battery with more voltage.

Criteria for the choice of perforator

Due to its functionality, the perforator is becoming increasingly popular. However, the variety similar to the first look of models makes it difficult to choose. At the same time, various models of perforators have different functions from each other, most of which are unnecessary after the acquisition. To avoid overpayment for not playing a special role role, it is enough to pay attention to the following parameters of the perforator.

Energy and impact frequency

The fundamental characteristic of the Bosch perforator is the energy of the blow, which determines the speed of execution of the task, as well as the distance of the free stroke of the cartridge. The impact energy depends largely on the engine power affecting the mass of the perforator. With low impact energy, there will be a small capacity, and the equipment of the perforator is quickly extended, since the hole will be drilled, and not break.

The impact frequency is the second after the impact energy indicator affecting the perforator performance.

The energy of the blow more, the greater the diameter it turns out the hole. In this case, the high frequency of beats contributes to the rapid breakdown of the holes.

The number of revolutions of Vala

The removal of dust formed during the drilling process occurs through the grooves of the bora. At the same time, the high-speed rotation of the shaft contributes to the rapid erasure of the grooves, the consequence of which is overheating a perforator with a possible jamming in the hole.

With increasing power, as well as the performance of the perforator, the rotation speed of the shaft and the frequency of beats is reduced.

Number of operating modes

Household models of perforators using the SDS-Plus system are equipped with 3 modes of operation, including drilling, drilling with impact, and dripping without impact. At the same time, professional perforators equipped with the SDS-MAX mounting system are deprived of drilling functions.

Availability of additional options

Even on Bosch's domestic perforators, the price can be high enough due to equipping it with additional functions. However, among the most important options it is worth highlighting:

• drilling depth limiter;
• reverse;
• smooth start system;
• speed \u200b\u200bswitching mechanism;
• device warning device overheating;
• speed regulator;
• anti-vibration system;
• stabilization of the velocity of the shaft with various load fluctuations;
• system "Varooled";
• dust removal system, etc.

The presence of most of these functions in one domestic tool should immediately generate doubt about their high-quality side. Quite often in this way trying to sell a high-class fake, disguising by means of a set of functions the quality of the perforator itself.

However, it is not necessary to completely trust the bosch reviews left about the necessary perforator model. After all, if someone immediately breaks the tool - this does not mean that it is poor quality. It is possible that the user in the process of work simply did not pay attention to the instruction manual prohibiting a certain kind of manipulation.

Thus, when the perforator is selected, it is worth repelled from its indicators such as power, frequency and impact energy, as well as the number of rollers of the shaft. In this case, the presence of additional functions is largely tied to the targeted use of the perforator, so choosing the tool must be based on the specific features of its future operation.