Electric drills can be divided into three categories: hand drills, impact drills, and hammer drills.
1. Hand drill: The power is the smallest. The scope of use is limited to drilling wood and being used as an electric screwdriver. It does not have much practical value and is not recommended.
2, impact drill: can drill wood, drill iron and drill bricks, but can not drill concrete, and some impact drills indicate that the concrete can be drilled, in fact is not feasible, but for the drill tile and the outer layer of brick is very thin cement is absolutely No problem.
3, hammer drill (electric hammer): can drill holes in any material, the most widely used.
The prices of these three kinds of electric drills are arranged from low to high, and the functions are also increased. How to choose them, it is necessary to combine their respective scopes and requirements.
The method of selecting the electric drill: taking the indoor ceiling as an example, the ceiling is made of reinforced concrete. If drilling with a percussion drill, it will take a lot of effort. I used it to install the light on the ceiling, and the result was not installed. Several drill bits have been lost; however, this is not the case with the wall, so the impact drill is suitable for daily use in the home, but for the punching staff, the hammer drill should be preferred.
When hitting the wall, the hammer drill will be more labor-saving than the impact drill. The key is that the structure and working principle of the two are different. I will not explain the jargon and terminology here. M is not interested in it. I use the most. Straightforward words are used to indicate that the impact drill requires a constant force to rotate it during use. When using a hammer drill, it is only necessary to apply a little force at the beginning to automatically advance the drill bit.
Hammer drill - has been introduced a lot, but need to explain a little more, I personally think that for households, electric drills, not to say that the brand is loud, the price is high, it must be better than those famous, need Look at your own use to purchase, pay attention to the purchase of electric drill: 1. The choice of electric drill size. As the size of the electric drill increases, the price will increase accordingly. For me personally, the size of the household electric drill is generally 10 mm. However, it depends on individual circumstances.
2. Additional function selection of electric drill: There are some additional functions for the same model. For example, if the model has R, it means the drill can be reversed. The advantage is that when the forward rotation is not possible, it can be converted to reverse; E means that the electric drill can be adjusted, and can be adjusted to low speed when no high speed is needed. Of course, the more functions, the higher the price will be. If you choose not to use it, you can look at your personal preferences.
3. The choice of product brand. Everyone knows that Bosch has the best quality drills, in addition to DeWalt, Hilti, and METAB.
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Label: Select Household Drill Tools
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