If you want to buy a suitable home power tool such as a drill

People who know decoration know that a set of Electric Drill is very important. For example, the electric drill will be used when removing the screw, and the installation will also be used, as large as the maintenance of household appliances, as small as the installation of a hook, all need to use the electric drill. Because the "door" of the drill is a lot, today I will share with you some popular science knowledge of the drill, the drill selection guideline, and some matters that need to be paid attention to when using the drill.

First, the classification of electric drill

It is mainly divided into the following three categories according to power: · Pistol drill · Percussion drill · electric hammer (hammer)

So what's the difference between these three? Let's take a look at each category in detail.

1. Pistol drill

This pistol drill is what we generally call an ordinary electric drill, generally its functions are more, the main functions are drilling, tapping, screwing, the torque of this electric drill is larger than our ordinary manual screwdriver. Generally, this ordinary pistol drill is equipped with a separate battery, do not always connect to the power supply to use. The lithium battery is often used as a power supply, and the lithium battery is charged and discharged more times, lighter weight and longer service life than the traditional lead-acid battery. And this electric drill can also adjust the torque, so that the force can be mild when drilling and tapping, otherwise it is easy to break the tap or drill, after all, this ordinary electric drill power is relatively small, the material that can be used is also relatively wired, general wood, aluminum, red brick, plastic, can also be drilled. But for concrete such a high hardness of things can only do nothing, but do not worry, I introduce the following percussion drill can be drilled on the concrete.

2. Percussion drill

This kind of Hammer Drill is larger than the above pistol drill from the shape, and it needs to be directly connected to the power supply when it is used, so it is necessary to pay attention to the safety of electricity in use, mainly because the power of the hammer drill is very large, and generally few batteries can meet this power. Therefore, the function of the percussion drill that must be directly connected to the power supply when used can be understood as an ordinary pistol drill + impact function, which mainly relies on the bit to produce rotation and axial impact force to work, generally the rotation mode and impact mode of this kind of percussion drill can be switched, which is very convenient, and it is simple to drill when there is no need for impact.
Working principle of percussion drill: In the ordinary rotation mode, it is the same with the hand drill, the motor drives the gear drive, the gear drives the connecting rod, and then drives the drill to rotate, you can start cutting and punching when switching to the impact mode, the gear beats above the inner shaft to drive the compression piston in the impact piston cylinder reciprocating movement, the compressed gas drives the impact piston cylinder hammer head to impact the drill with a higher impact. Thus, the drill bit can impact forward, so that the drill bit can have the effect of Impact Drilling, thus enhancing the ability to drill, and theimpact drill can be understood as an electric drill that can drill concrete. But it needs to be explained that although the hammer drill can drill concrete, but the ability is still very limited, for some particularly hard concrete, but also powerless, this time you must use the last drill king - electric hammer (hammer)

3. Electric hammer (pickaxe)

Electric hammer is specially designed for drilling concrete, we install air conditioners in the home, water pipes, some large electrical installation needs to install expansion screws on the floor, etc. These need to open holes in the concrete or drill deep holes are the need to use electric hammer. The rotating force of the electric hammer at work does not need to be too large, the impact force is much larger than the rotation of the drill, but it is also due to the large impact force, so the vibration will be very large, mainly used for concrete, ceiling, floor, wall demolition, but can not be used in the metal above the hole
The working principle of the electric hammer is that the transmission mechanism drives the drill to do rotational movement at the same time, there is a repeated hammering movement perpendicular to the direction of rotation, the motor drives the gear to rotate, the gear then drives the eccentric movement, the eccentric is driven by the connecting rod, the connecting rod in the cylinder reciprocating movement, continuous impact, the transmission mechanism drives the piston cylinder reciprocating compressed air, The air in the cylinder changes periodically, driving the hammer to reciprocate the top of the drill bit, which is somewhat similar to the role of our hand to hammer nails with a hammer. There are many types of electric hammers on the market, and they can also be integrated with many functions, and they can be switched to the state of the electric hammer. At this time, the electric hammer is just hammering all the time, without rotating motion. It is mainly used to remove walls, floors and other places.

Two, three differences

The impact of electric hand drill, percussion drill and electric hammer is arranged from low to high, and the corresponding price and power are also the lowest power of the drill from low to high, and the impact is almost no, generally used in some comparison software materials, such as some plastic parts, aluminum plates can be used, and can also be used in tapping. It is also very convenient that the impact strength of the percussion drill is relatively moderate, and it can deal with some concrete that is not very hard; In the chuck place can switch his working mode is rotating or percussion drilling mode, but generally rarely use this impact rotation to turn the hole, because the direction of the hammer drill is not easy to grasp, easy to appear misoperation, the opening hole is too large situation, the drill is not very sharp, the opening of the empty around the relatively uneven, There will be burrs or cracks in the electric hammer is the biggest impact of the three, not only can drill but also have a good hammering effect, the range of use is also the most extensive, so the electric drill, percussion drill, electric hammer in different families are playing different roles, you need to choose the right one according to your family.

How to choose the right drill for your family

How to find the right drill for your home, which can be selected according to your family use
1. Just disassemble screws, there is no drilling demand at home generally disassemble screwdrivers, the average family is spare, and if some thick screws, hand twisting is more laborious, the arm strength requirements are also great, then at this time you can consider the use of a pistol drill is more convenient.
2. Need to open holes, occasionally need to simply punch holes in some boards, aluminum plates, but also need to disassemble screws in this case is also arranged a pistol drill can be done, use the corresponding drill can be done, the use of lithium batteries is also strong power, the greater the voltage, the more sufficient power, generally choose 12V lithium battery power 3. The need for simple concrete holes, disassembly and installation of screws at this time, the ordinary pistol drill is certainly not possible, the need to replace a percussion drill, mainly because the percussion drill for concrete simple drilling can be completed, but also more suitable, what to do the work on the use of what tools are good, battery or wired, And that's the right thing to do and to figure out the pros and cons before you use it.

Iv. Summary

Electric drill is generally divided into three categories: pistol drill, percussion drill, electric hammer, the scope of use of each type needs to be determined according to the needs of your own family, the pistol drill is a simple drilling, tapping work, can not meet too much high-strength work, the strength of the hammer drill is relatively large, can be drilled in concrete, can also be used in drilling above. However, there are not many electric hammers used in metal drilling above is mainly a large impact force, specially used in concrete drilling above, destructive is also very strong, generally used by professional construction teams, it is also very good above is some simple summary of three electric drills, I believe you can certainly find your favorite electric drill does not step on the mine ~