Cordless Rotary Hammer - Model Overview
Perforator is called a tool that, due to the shock rotational movement, or each operation separately, creates a directed destruction of building structures. The cordless rotary hammer operates on electrical energy from charged batteries. In other configurations, the tool can operate from the mains, on compressed air, or receive the required power for the working mechanism with a diesel engine.
Varieties of cordless rotary percussion apparatus
- nickel-cadmium;
- nickel metal hydride;
- lithium-ion.
Since the capacity of the batteries allows working for a limited time, the devices are equipped with a pair of batteries and a charging station.
Any hammer drill is a dangerous tool. Personal protective measures - closed clothing and shoes, a respirator and special glasses must be mandatory equipment of the operator.
The performance and ability to carry out the work of the cordless rock drill depends on its power. The power is determined by the voltage at the terminals. Performance depends on spindle speed, frequency and impact force. An important indicator, depending on the power, is the diameter of the drilled or punched hole. The functionality is due to the number of operating modes. It is better if the cordless hammer drill supports all three modes - drilling, hammer drilling and hammering.
Aggregates are classified by weight category. Light devices weigh at least 2, medium - more than 4, the weight of heavy ones does not exceed 12 kg. Each device has an instruction manual, which should be studied and the recommendations strictly followed. Particular attention should be paid to the general requirements:
- any preparatory, repair operations should be carried out only with disconnected batteries;
- before installing the shanks into the socket, do not forget to lubricate the installation site;
- when installing the nozzle, make sure it is fixed and not skewed;
- perform a test run, determine if there are any extraneous knocks;
- set the operating mode, work intermittently to clean the slotting hole and cool the device;
- after work, clean and vacuum all gaps, wipe the body, assemble and clean the nozzles.
Results of testing new models of 18 V SDS rock drills
During real testing of devices at the time of laying communication networks in an old building, where the walls are made of high grade concrete, the advantages and disadvantages of the tested devices were determined. The work consisted of chipping, creating in-wall channels, drilling holes in walls with a section of 6-25 mm. Operational trials have shown that model makers are struggling:
- creating models with reduced weight;
- increasing functionality;
- increasing the reliability and durability of the devices.
The battery is presented for testing puncher Makita LXRH01. If all the designers have set a goal to protect the worker from vibration, Makita has developed an additional battery protection system, which is unexpected but reasonable. The new lithium-ion battery of the battery was charged within half an hour, as indicated by the charging indicator.A charger and a second battery are included in the package, soft case. The hammer drill has three modes of operation. The high cost of the device is justified, since there is a vacuum dust extraction that meets the standard. This is one of the few devices in which an electronic unit is used instead of brushes. But the leader of the tests was a model from Bosch.
Rechargeable hammer drill Bosch RHH181 took the lead. The device is equipped with a capacious battery for 4 A * hours. This device produced less noise and was one of the lightest. Built-in LED illumination for convenient operation. The model uses a brushless motor model, looks very compact and well balanced. From all tests, the model came out at the forefront in performance. The experts' verdict unanimously named the model as the leader among similar punchers. The tool is produced in Germany.
The DeWalt DCH213 cordless rotary hammer is not far behind the leader. The testers singled out the apparatus as the best in terms of vibration absorption. This is an important indicator, precisely because of the vibration, safety precautions prescribe working with a hammer drill for no more than 1.5 hours per work shift. During the tests, the machine was ahead of the leaders in drilling speed. The device is equipped with LED illumination and has a jackhammer function. He worked on a battery with a capacity of 3 A * hours, but was not inferior to more powerful models. The hammer drill won the third place due to its high protection against vibration and noise absorption, but instability is noticed during operation.
The Hilti TE4-A18 cordless hammer was noted as the most productive machine in all exercises, despite the 3.3 Ah battery capacity. The device comes with two lithium-ion batteries and a charger. The disadvantage was the high cost of the hammer drill and the small number of models on the market.
Since 2010, the domestic manufacturer of construction power tools Interskol owns a unique complex of equipment production. The line allows the production of devices without deviation in quality. From the moment of installation and development of the complex, the reliability of the tools produced will be equal to that of the world leaders.
None of the domestic models of rock drills participated in the test. Introducing the latest battery puncher Interskol PA-16 / 18L.
The model was developed and put into production in 1916. This is the response of the Interskol-Alabuga plant to numerous requests from users to create an analogue of the P-18 / 450ER with batteries. The tool uses lithium-ion batteries with a voltage at the terminals of 18 V. In the new rock drill, the engine and gearbox were modernized, increasing the operating time without recharging. At the same time, the mass of the tool is 2.5 kg with a frequency of impacts of 6800 and an impact force of 1.2 J. The new model will be sold at the same price as the network model.
The review notes the direction of development of cordless rock drills, and what you need to look for when choosing a tool.