How to choose a home electric drill correctly

Abstract: Electric drill is a kind of drilling machine powered by electricity. It is a conventional product of power tools and the product with the greatest demand for power tools. Nowadays, all kinds of electric drills and fancy brands on the market are dazzling, and many consumers don't know where to start. How to choose a home electric drill correctly? What are the common classifications of household electric drills? Next, let's look at Bian Xiao. 1. What are the common classifications of household electric drills?

Electric drills can be divided into three categories: hand drills, impact drills and hammer drills.

1, hand electric drill: the power is the smallest, and the use scope is limited to drilling wood and being used as an electric screwdriver. There is not much practical value, so it is not recommended to buy it.

2. Impact drill: you can drill wood, iron and brick, but you can't drill concrete. Some percussion drills indicate that concrete can be drilled, which is actually not feasible, but it is absolutely no problem to drill thin tiles and bricks on the outer layer of cement.

3. Hammer drill (electric hammer): It can drill holes in any material and has the widest application range.

The prices of these three kinds of electric drills are arranged from low to high, and their functions have also increased. How to choose specifically needs to be combined with their respective scope of application and requirements.

Second, how to choose a home electric drill correctly

1, the choice of electric drill size, with the increase of electric drill size, its price will also increase, and the size of household electric drill is generally 20 mm.

2, electric drill additional function selection, the same model, there will be some additional functions, such as the model with R indicates that the electric drill can rotate forward and reverse, its advantage is that when the forward rotation is not good, it can be converted into reverse rotation; An e in the model indicates that the electric drill can adjust the speed, and it can be adjusted to low speed when high speed is not needed.

3. Use an electric drill. Take the indoor ceiling as an example. The ceiling is made of reinforced concrete. It takes a lot of effort to drill a hole with an impact drill, but not when it is used to hit a wall. Therefore, impact drills are suitable for daily use in families, but hammer drills should be the first choice for drilling workers. When hitting the wall, hammer drill will save more effort than impact drill. The key lies in their different structures and working principles. An impact drill needs constant effort to make it rotate, but when using a hammer drill, the drill bit can move forward automatically at the beginning with a little effort.

4. Observe the outer packaging of the electric drill. The outer packaging of tools should be clear and undamaged. The plastic box should be firm, and the buckle for opening the plastic box should be firm and durable.

5, observe the appearance of the electric drill, the appearance of the tool should be uniform color, plastic surface without obvious shadow silk and dent, there should be no scratches or bumps, the assembly dislocation between shell parts is less than or equal to ≤0.5mm, the cast aluminum coating is smooth and beautiful without defects, and the surface of the whole machine should be free of oil and stains. It feels better when you hold it with your hand. The handle of the switch should be flat. The length of the cable should generally not be less than 2 meters.

6. Check the nameplate and instructions of the electric drill. The nameplate parameters of the tool shall be consistent with those on the 3C certificate. The detailed address and contact information of the manufacturer and factory should be in the instruction manual. The nameplate or certificate shall have traceable product batch number.

7. Hold the electric drill by hand, turn on the power supply, and operate the switch frequently by hand to make the tool start frequently, and observe whether the on-off function of the tool switch is reliable. At the same time, observe whether there is any abnormality in the TV and fluorescent lamp at the scene. So as to confirm whether the tool is equipped with an effective radio interference suppressor.

8, electric drill running for one minute, turn by hand, the hand should have no obvious abnormal vibration feeling, observe the commutation spark, commutation spark should not exceed the level, generally from the air inlet of the tool, there should be no obvious arc on the commutator surface. During operation, there should be no abnormal noise.