Home drill how to choose?

First, the classification of Electric Drill What is the difference between different types of electric drill? Do not look at the hundreds of electric drills on the shopping platform, in the final analysis, it is mainly divided into four categories: electric screwdriver, hand electric drill, percussion drill, electric hammer.

Second, how to choose the right drill
We summarize the purchase method of electric drill as simple: 3 views, the most important of which is to see the use of demand.

1, see the use of demand only screw, choose "electric screwdriver" Electric screwdriver is used to screw, light weight, small volume, small noise, easy to use. In fact, the principle of the electric screwdriver and the electric drill is the same, but the torque of the electric screwdriver is smaller, and the electric drill is larger, so the electric drill can punch holes, and the electric screwdriver is not.
Only screw and light holes, choose "hand drill" If your needs are to screw and make a hole in the material that is not hard, the hand drill is perfectly sufficient. Wood, red brick, glass, metal, tile can be drilled with it, but not drill concrete! Because its drill bit rotation mode is to simulate the state of manual twisting, it is relatively simple.
Both screw, but also to open the hole, occasionally lightweight concrete drilling, choose "percussion drill" percussion drill can be seen as the evolutionary version of the electric drill, more role. It switches to the flat drilling gear is a hand drill, cut to the driver file is a screw batch, switch to the impact gear can drill, gear high-frequency impact can reach tens of thousands of times/minute, so the opening (breaking) ability is stronger, and can be understood as a natural stone, ordinary concrete drill.
However, the ability of the Hammer Drill to drill concrete is very limited, and in the face of difficult bones, anelectric hammer must be used. Both screw, but also to open the concrete hole or even remove, choose "electric hammer". Electric hammer is a tool designed for concrete, air conditioning, water pipes, planting bars and even installation of water heater expansion screws need to open large holes in the concrete or drill deep holes in the project need electric hammer. The electric hammer on the market is mostly multi-functional electric hammer, which can be switched to the state of the hammer, which is specially used for dismantling, such as dismantling the wall and dismantling the cement floor.

2, look at the way of electricity, such as hand drill, percussion drill and other light tools, I recommend choosing to buy wireless charging, because of high flexibility, easy to use, not limited by the nearby power supply, and can be used outdoors. If it is a heavy-duty, high-power tool like an electric hammer, you can consider a wired plug-in model, which has a stable power supply and can work for a long time.

3, look at the size of the electric drill bit home, the size of the electric drill bit is generally selected 20mm is enough. In addition, as the size of the electric drill increases, the price will also increase.

4, see additional functions of the same type of drill, there will be some additional functions. For example, the R in the model indicates that the drill can be reversed, and the advantage is that when the forward turn is not possible, it can be converted to reverse; The E in the model indicates that the drill can be adjusted, and the high-speed or low-speed is selected according to the actual use scenario.