When choosing a hammer drill, you must pay attention to its power type. There are two types of this power tool:
• Corded hammer drill, which operates from a standard electrical outlet. Not always convenient due to the cord. But it is always ready to work – the main thing is to have a socket nearby.
• Cordless. Used when a large amount of work is needed without constant access to electricity. It is recommended to use a lithium-ion battery. It is more expensive but has several advantages. Its battery capacity will not decrease over time.
Next, you need to focus on the power and weight of the tool. These two parameters are very important when choosing a hammer drill. You should know that as power increases, weight increases.
Thus, a tool with power up to 700 W can weigh no more than 3 kg. This is a lightweight option for rare household use on not very hard walls. If you need a tool for simple construction work or minor repairs, it is best to choose a Sturm hammer drill from Ukrelectro.com.ua, represented in this online store in several modifications and at a quite reasonable price.
For more frequent use, preference should be given to hammer drills with power from 700 W to 1200 W. This is a more substantial tool that can solve most of the tasks set before it. Good performance, weight of about 5-6 kg – this is truly a worthy choice for a good homeowner. Based on these characteristics, you can also select Sturm hammer drills or from other manufacturers.
If the tasks are more serious, for example, breaking through thick concrete walls, then you cannot do without a tool with a power of more than 1500 W. These models are called semi-professional, and their weight reaches 9 kg.
Hammer drills can also be classified by the type of chuck:
• Chucks manufactured by Bosh. SDS-Plus chuck. With it, you can easily change the drill bit without special tools. It is very common and is installed on lightweight models. The drill bit size for such a chuck is from 4 mm to 26 mm.
• SDS-Max chuck (also from Bosh) is used for drills with a diameter of more than 20 mm. Suitable for heavier and more powerful models.
Another important parameter is impact energy. It shows the maximum allowed drilling diameter. Both work efficiency and tool speed depend on this value. The most successful is a hammer drill with an impact energy from 2.2 J to 4.5 J.
Also, do not overlook indicators such as the number of impacts and revolutions per minute. Tool productivity is directly related to these values.
Note that the hammer drill may indicate the maximum drilling diameter for different materials (wood, concrete, etc.), as well as the drilling diameter with a core bit.
There are three operating modes for the hammer drill:
• Drilling. Used when working with soft materials (such as wood).
• Hammer drilling. Suitable for working with concrete walls.
• Hammer only. Performs the function of a demolition hammer.
There are models with only one mode of operation, but these are very specialized tools. They are usually intended for a specific type of work and are used only by professionals. For home use, a universal hammer drill with three operating modes is better suited.