Installation works at construction sites, in residential premises and at production facilities often involve mechanical operations with solid materials. These include concrete, metal, brick and even stone. The solid-state structure is not amenable to cutting with a conventional drill and all the more with saws. Only punchers whose battery versions are becoming more popular can perform such work qualitatively. True, the models differ in many respects, which complicates the choice of the best option.
Features of cordless rotary hammers
As in the case of network punchers, the advantages of their cordless counterparts are primarily determined by the impact energy. In a simple way, all models of this group are divided into household devices and professional ones - accordingly, the impact energy is up to 3 J or more. From the point of view of operability, the best cordless rotary hammers should also have wide drilling capabilities in terms of hole sizes.
The main differences concern the energy supply system. The device is powered by a small battery pack, which allows you to work in conditions of remoteness from the outlet. Therefore, in addition to the power potential and drilling parameters, the number of important characteristics includes indicators of autonomy. On average , this type of cordless tool can work for 50-60 minutes. At the same time, charging takes the same amount of time. The optimal solution is to purchase a model with two battery packs. While one of them is charging, the second can be connected to a power outlet - but, of course, if there is such an opportunity on the job site. One way or another, the best option should be determined by a combination of characteristics. This will help to review the cordless rotary hammers below.
Model DHR202RFE by Makita
The model provides the user with 3 operating modes, including standard drilling, chiselling and impact perforation. Especially for the breakaway of tiled materials, the developers also provided for a special rotation of the bit. The device can not be called high-power, but its power potential is sufficient for most typical construction and repair operations. Actually, the main advantages of this model are different. Like all Makita cordless rotary hammers, this version is provided with a wide range of functions that allow you to adjust workflow parameters. For example, the operator can use a reverse stroke, can easily be controlled with a trip clutch, connect the backlight to the process, and also adjust the engine speed. An important structural addition was the introduction of the SDS cartridge, which allows the replacement of the cutting element with one hand.
Ryobi R18SDS-L25S Model
This unit is also able to work in different modes, endowed with wide functionality, but at the same time it has some unique qualities. So, the developers have provided the possibility of using its battery for all battery models of the Ryobi line. That is, one battery pack is suitable for the entire arsenal, which is planned to be used at the construction site. This decision justifies itself if only one person works. Otherwise, cordless rotary hammers of this series offer the same features - backlighting, reverse stroke, speed adjustment and a convenient drill change system. However, one more advantage of this punch can be noted. Despite the fact that the model corresponds in technical parameters to the more eminent development of Makita, it costs less - 14 thousand rubles. against 22 thousand
Bosch model GBH 18 V-EC
Unlike Japanese designers, German developers have gone far from the functions that have become familiar in professional construction and are actively exploring new directions. The results of this work were embodied in the GBH 18 V-EC model, which received an innovative brushless motor. All experienced users of hand-held power tools such as drills and screwdrivers know how important it is to replace carbon brushes in a timely manner, extending the life of the power plant. So, Bosch cordless rotary hammers eliminate this need. At the same time, the creators of the device did a good job of improving the controls, providing an ergonomic on-off toggle switch to switch operating modes.
How to choose the best model?
Take into account primarily the operating conditions of the punch. You may need a dust removal system, LED backlighting, the ability to configure the optimal operating mode, etc. If you need a universal assistant in working with walls and partitions, then you should prefer a model from Makita. This is a reliable and functional device that can easily perform basic operations. If the power is not of primary importance and it is planned to use the tool in different conditions, then it is worth choosing a cordless rotary hammer from Ryobi, since it has the most efficient power supply system. Bosch development is suitable in both cases, but also saves the owner from the hassle of the maintenance process.
Conclusion
With the regular use of power hand tools, professional builders are paying more and more attention to the work resource of the element base. This is due to the fact that repairing a cordless rotary hammer requires serious investment and only in rare cases can it be done independently. As a rule, such actions come down to disassembling the device and cleaning functional elements whose mechanisms are clogged with dust. To the need for such events arose as rarely as possible, it is recommended to initially pay attention to the housing properties in terms of dust tightness. Of the models described above, only tools from the German manufacturer Bosch have such protection. This device is also balanced in terms of power characteristics, and is simply convenient for working manipulations.