The first experience of manufacturers on the use of batteries in a hand-held construction tool revealed many advantages of this solution over network analogues, but also showed obvious disadvantages. In particular, autonomy was ensured to the detriment of the power potential, therefore, batteries were more often used in the lower segment of household tools. However, today, thanks to the optimization of batteries and chargers, developers successfully use this principle of energy supply even in impact electric drills. For example, the Hitachi rotary hammer, presented on the market and in professional versions, does not lose power to many network models of its own class.
Hitachi Rotary Hammer Overview
The manufacturer relies on an organic combination of high power potential, ease of use and energy efficiency of these products. By scope of application, the devices are also divided into household and professional. The power of the devices is enough to perform work with concrete and brick - by and large, only the parameters of the holes that form the Hitachi nozzles differ. The cordless rotary hammer of this line is also provided with new structural solutions. Almost all models allow the operator to set restrictions on the depth of drilling, which favorably affects the accuracy of the operations. A variety of modes also optimizes the process - the user can adjust the settings based on the requirements for the result and the characteristics of the processed material.
Reviews on the model DH18DL
One of the lightest and most compact models of rotary hammers in the line of the Japanese manufacturer. Users note that the device is easy to use and at the same time provides good impact force. Nevertheless, you should not count on high power. According to the owners, thick high-strength walls such a machine can not do. But with simple household drilling operations on hard surfaces, the Hitachi DH18DL punch is easy to handle. The possibility of changing the impact energy indicator is also emphasized. So, for very simple tasks, the user can use the economical mode of operation, which will also leave a minimum of dirt. Conversely, reinforced rigging makes it possible to drill large holes. Convenient controls take a minimum of time to configure, which is also attributed to the advantages of this modification.
Reviews about the model DH24DV
The model can be attributed to a full-fledged medium-sized rotary hammers, although the setting of the modes allows operation in conditions demanding on the quality of work. For example, the usual drill mode will allow you to accurately drill in the places of laying communications without the risk of damaging them. Users also note the sliding type mount, which ensures convenience when replacing equipment. The power feature of Hitachi 24 is also emphasized. The hammer is supplied not with popular lithium-ion cells, but with a Ni-Cd battery. Some users criticize developers for such a solution, since it is less practical. The fact is that such batteries charge longer and are less active. The pluses of this element include toxic safety. Even depressurization of the unit will not have a harmful environmental impact.
It is worth noting that the model also has a network modification, which works from a conventional outlet, without requiring recharges. This is a Hitachi DH24PH rotary hammer, which has approximately the same operational capabilities, but you can work with it only with access to the network. But in exchange for this inconvenience, one can note the small weight of the apparatus, which simplifies physical manipulations.
Reviews about the model DH25DAL
The device continues the development of the above version, offering serious improvements. Just in this modification, power is provided by a lithium-ion battery. But, as users note, it also has a considerable charging time of 60 minutes. But the work process was also increased in time. As a result, an operator with approximately the same capabilities works longer. In addition, tool owners note advanced drilling options. So, in concrete walls, holes up to 26 mm can be formed. As for metal, the Hitachi rotary hammer allows you to work with nozzles with a thickness of 13 mm. Actually, in this characteristic, this model is similar to the DH24DV modification.
Reviews about the model DH36DAL
One of the most powerful versions of Japanese rotary hammers, which combines high productivity and comfort when performing work. Users point to a multifunctional nozzle fixation mechanism that allows the replacement of drills during operation without delay. The possibility of using several modes, including the “jackhammer”, is also emphasized. Despite its high productivity, experience shows the low energy consumption of a Hitachi rock drill. Reviews, of course, do not characterize the 80-minute charge in the best way, but it lasts for a long time. Moreover, the manufacturer supplies the device with an additional battery pack, which doubles the operating time in conditions of complete autonomy.
How to choose a hammer drill?
The main selection criterion is still power, as is the case with traditional network models. The power potential of the target apparatus depends on the material and structures with which it is planned to work. Further it is worth paying attention to the drilling parameters with which the Hitachi puncher works in a specific modification. It is one thing if the formation of small niches for network wiring is required, and another if the creation of channels for laying utilities in the form of a pipeline is provided.
Conclusion
The practice of combining several functionalities in one tool does not always confirm the convenience and effectiveness of such solutions. For example, an electric screwdriver fully combines the function of a drill without impact. Japanese developers managed to combine the capabilities of a hammer drill with conventional drilling. One of the first models of this type was the Hitachi DH26PC network puncher, reviews of which confirmed the quality of the holes obtained and the high impact. As for the battery versions of this line, they also managed to prove the possibility of maintaining autonomy while maintaining sufficient performance. Of course, the need to perform additional manipulations with charging the battery complicates the process, but you can’t do without such a tool in the distance from the mains power source.