For the most part, rotary hammers for professional use have good operational qualities, but they lose to home analogs in terms of ergonomics. This combination of qualities suits most users, since the solution of complex problems in construction in itself implies, above all, a high return on the direct function of the tool. Nevertheless, Bosch developers decided to move away from the general rule and create a model that combines the advantages of both categories - that is, combine ease of use and high power. The result of the efforts of German designers was the Bosch GBH 2-26 DFR Professional puncher , which can be used in solving a wide range of construction and installation operations. The model has virtually no competitors in its class, which makes it a unique development.
Rotary hammer device
The basic composition of the tool includes a standard set of components, including: working elements, safety equipment, a wide range of cartridges, an ergonomic handle, latches and stops, shanks and snap rings. As for the external design, it is represented by the main and auxiliary handles, which are integrated into the body. Also, the Bosch rotary hammer device has a safety screw, which allows you to drill with the desired parameters regardless of the quality of tool monitoring by the user. A design feature is the ability to easily use different nozzles. Thanks to the SDS Plus system, the operator can use a quick-clamping chuck, that is, it is possible to work with nozzles that may not be compatible with the SDS chuck. This solution significantly increases the functionality of the punch, eliminating the need to have a model with other parameters of work elements on hand.
Specifications
The model has a fairly high impact force, while it can maintain optimal drilling quality for a long time. This efficiency is ensured by the technical filling, which the Bosch GBH 2-26 DFR Professional puncher has in its basic version. So, the characteristics of the model are as follows:
- Food - from a network 220V.
- The power consumption indicator is 800 watts.
- Frequency of blows - up to 4,000 rpm.
- The number of working revolutions is up to 900 rpm.
- The number of operating modes - 3.
- Torque at maximum performance - 28 N * m.
- Shock potential - 3 J.
- The maximum diameter in steel processing is 1.3 cm.
- The maximum diameter in concrete processing is 2.6 cm.
- The maximum diameter in wood processing is 3 cm.
- The diameter of the crown is 6.8 cm.
- Tool dimensions - 40.7x21 cm.
- Cable length - 350 cm.
- The mass of the electric tool is 2.7 kg.
Technological features of the punch
The implemented technologies are aimed at improving the tool in several ways. So, for the convenience of the operator, an additional handle is provided. With its help, the user can ensure accurate operation without getting tired for a long time. Auxiliary handles are also used by other manufacturers, but the Bosch GBH 2-26 DFR Professional puncher is complemented by a device with a soft grip and the ability to turn in any direction. The presence of a limiter in the tool contributes to high accuracy. This device makes it possible to choose the depth and create the same holes with the set parameters. Also, the user can adjust the number of revolutions. This function is controlled by stepless adjustment by changing the force exerted on the switch.
Assembly and adjustment of the punch
Use of the tool is recommended only with an additional handle. To install it, it is necessary to turn the handle in the desired direction until it is fully locked. In the correct position, its tightening tape should be in a special groove of the body. Next, adjust the drilling depth. For this setting, use the appropriate limiter supplied with Bosch rotary hammers. The instructions indicate that when installing the corrugation of the limiting device should be directed upwards. Then the SDS-plus cartridge is fully inserted. It is very important that it is correctly installed, as the slightest displacement will lead to improper operation of the tool. The limiter must be stretched so that the gap to the end of the drill matches the set depth.
Instructions for use
First of all, you need to insert the right chisel into the cartridge, which can be fixed in different positions. Next, the operating mode is set. Before use, check the condition of the protective cap. The spare parts available for users for the Bosch rotary hammer include this element, so there will be no problems updating it if necessary. If it is planned to work with crushing, then the right direction of rotation of the working element should be established. We should also consider setting bits. You can only use bits for wrapping using a special bit holder equipped with an SDS-plus locking shank. Before installing this element, its landing end should be carefully lubricated and cleaned. The device is inserted until it is automatically installed.
Maintenance Instructions
High-quality and safe operation of the tool is possible only if its ventilation openings are kept clean. To carry out preventive measures, the Bosch rotary hammer is disassembled, which provides for the separation of all working elements and an additional handle. All surfaces of parts should be cleaned, but without the use of strong chemical solutions and coarse-grained abrasives. The cartridge should be cleaned every time after using the tool.
Not all faults can be eliminated on their own. As a rule, independent repair involves only the replacement of damaged elements that can be dismantled at home. The German manufacturer supplies custom parts for the Bosch rotary hammer to its customers. To order, you need to determine the component number and redirect it to an authorized center.
Positive feedback about the model
Owners note the high-quality assembly of the device, its high performance and ease of use. High power with an impact energy of 3 J allows you to cope with the most difficult materials to process - practice shows that the Bosch GBH 2-26 DFR Professional puncher effectively drills both concrete and metal. The main thing is to use the settings correctly. We can say that any rotary hammer from the segment of professional models is distinguished by high productivity. However, in the case of the German instrument, users emphasize the wide functionality, complemented by well-thought-out ergonomics.
Negative model reviews
Negative reviews relate to the weight of the punch and the cost. Still, a decent power potential could not be realized without weighting the device. True, the presence of an additional pen, as shown by the experience of the owners, compensates for the weight. In terms of cost, the device surpasses both lower-level models and inexpensive professional counterparts from other manufacturers. In this case, the high quality and reliability that the Bosch rotary hammer possesses have an effect. The price varies from 8 to 10 thousand rubles. For comparison: lesser-known brands offer similar options for 6-7 thousand. Although a complete comparison of their products with the German hammer drill is out of the question.
Conclusion
The market for construction power tools is quite densely filled with models in different segments. As a rule, for any device you can find a similar option from a competitive manufacturer. However, the model from the German company has several features that distinguish it even in the class of advanced professional tools. The main advantage is the cartridge for the Bosch rotary hammer, which expands the operator's capabilities in terms of choosing suitable nozzles. Together with high power, the tuning tools make the operation of the hammer drill efficient and productive. You can get high quality drilling in any material. In addition, Bosch developers have taken a major step in terms of automating the processing process. It is enough to say that adjustment devices and limiters save the user from thorough checks of the working area.