Drill bit for concrete drill design selection and tips for use
If it is necessary to drill a hole in the wall, it is better to use a drill with a chuck. However, if there is no peorator, it is not necessary to buy specifically this tool for drilling concrete. A drill can also do it. Just to drill a hole in a concrete wall, you need a concrete drill bit. This is a special nozzle, which is installed in the collet chuck of the tool. They come in different types and designs, so before using, you need to understand their structure and application.
Initially, you need to find out what a concrete drill bit looks like on a drill to make a hole in the wall. To implement the idea, you will need a drill with an impact function. It is for an impact drill it is necessary to select a special drill for drilling concrete. In normal drilling mode without a blow, the tool will not be able to cope with the task.
What an ordinary drill looks like for wood and metal, everyone can imagine. For drilling concrete apply a similar design nozzle, only with a slight difference. the presence of hardfacing of carbide materials on the tip, head or working part. These tips are designed to penetrate the wall and at the same time increase the life of the cutting tool.
Concrete drill bits for drills are coated with tungsten carbide, which combines a tungsten alloy with cobalt. This carbide material is applied only to the head of the bit, which is directly involved in contact with concrete and other similar materials. An alloy of tungsten and cobalt makes the bits tough, reliable and resistant to cutting edge abrasion.
In addition to pobedite, manufacturers also produce concrete drill tooling with a tungsten cladding, or more precisely, a diamond dust sputtering. Such bits are even more reliable in tougher materials. They can even be used for drilling in reinforced concrete, because of their high cutting performance.
The concrete drill bits differ not only in the head design, but also in the shank. The shank is the part that is recessed in the drill chuck and is clamped by the legs of the mechanism.
This is interesting! The head of the concrete drill bit consists of a cutting plate that has a protrusion greater than the spiral itself by 1-2 mm. It is this cutting plate with a special sharpening at an angle of 75 degrees, covered with a tungsten carbide.
It is by the design of the head that you can distinguish the concrete drill bit from other metal and wood drilling attachments. Before choosing a pobedite drill bit, you need to understand their types and design parameters.
How to choose and work with the tool
When choosing a tool to drill a hole, you should understand that your work depends on it. A good drill accurately drills a concrete wall, or other desired material, simplifies the drilling process, while a bad drill will require a lot of time, may fail, or complicate the task. What you need to pay attention to when choosing a drill:
- Is it possible to change the drilling speed??. this point is important because the speed control will ensure that the drill works accurately, helping it not to damage the surface.
- Is there an option of impact drilling and depth adjustment??. percussion drilling can be used on problem areas by softening them.
- Can the drill be held with both hands?. the drill is not a light tool and therefore preference should be given to models that are equipped with handles.
- Is the power of the tool satisfactory for your work?
Once you have decided on the drill, you must get the hang of it before you start. To do this, take the drill in one hand, like a gun, the other hand is placed on the handle of the tool (if it is not supposed to the design, the hand is placed near the chuck). The drill must be held with both hands horizontally so that the hole is not tilted or at an awkward angle. Wait until the drill has reached ambient temperature before turning it on. sudden changes in temperature can cause condensation. Unplug the tool if you want to rest during work.
Classification and features of drills for concrete
When you have figured out whether you can use all kinds of tools, including a drill, to drill concrete, you should take a closer look at what features drills have. All of them usually have carbide tips that provide strength to the material and workpieces. Such consumables are called pobeditovye and can be designed for a drill or peorator. In the first case, the tool has a polygonal or cylindrical configuration.
You can recognize the accessories for the torch by their designations SDS-plus or.max. Drill concrete with a framework inside, you can use the impact function of the tool, applying a drill:
With the former you can drill into concrete to an impressive depth. Use a drill bit of the second type if you want to drill holes with a large diameter. If you need to drill a concrete slab to an insignificant depth and diameter, you need to buy a hollow consumable.
Many people wonder if it is possible to make holes up to 100 mm in diameter and larger. The answer is positive. If you are also among such masters, who set themselves such a task, you should buy a drill bit, which may have a diamond coating or a diamond-cutting part.
Attention! When drilling holes in concrete, you will need to choose a certain diameter of tooling. As this parameter increases, the length of the drill will become longer. This is due to the fact that a thin and long consumable will not be able to take impressive loads.
Tips for working with tools
Even the best tools can be ruined if you do not know the basic rules. But it happens that even experienced craftsmen forget about them in a hurry.
Take, for example, the same drill bit. If you encounter an obstacle on the way, it is worth taking out the drill, insert a puncher into the hole and hammer it in until the rubble splits.
Yes, an impact drill can break stone. But drills break quickly on stones, and the punch is cheaper. The pointy end can easily be sharpened with a file if it gets blunt.
To be sure you hit a rock and not a piece of rebar, you can put a screwdriver with a magnetic tip in the hole: if metal filings stick to it, it is the rebar (but you can usually tell by the spark that flies out).
In general, the fact that under the intended place does not run armature, it is worth making sure before starting work. walk along the wall metal detector, so that then accidentally do not hit the drill wiring, cables or pipes.
To drill bits and bits do not overheat, they need to be wetted (although some carbide drill bits can break from a sudden drop in temperature). But at least you should take them out of the hole as often as possible while working. This is especially true for hammerless drills.
How to drill concrete?
First of all it is necessary to choose a tool. Basically, there are two options: an impact drill and a peorator. Of course, it is best to choose a peorator, because the initial task of this tool is precisely to punch holes in concrete or stone. With its help you can make holes large enough in diameter, while even the best impact drill is not designed for drilling passages thicker than 12 cm. But if you are going to drill foam concrete, in this case it is preferable to use a drill, as a peorator will simply break the wall. Remember that you can not use an ordinary hammerless door for work, because it is not only useless, but it can also lead to a breakdown of the tool.
If you will need to make a few holes, you can use a drill in the absence of a torch, but if you have to work for a long time, you can not avoid buying one. It is above all a question of saving time and effort, because the drill is not designed for such high loads. But if you still have to work with this tool, remember that in this case they use a pobedite drill bit for concrete, the tip of which is covered with a carbide coating.
Ways to drill through concrete
At this point in the construction business, at least three ways are well known with which you can drill holes in concrete, even despite the built-in reinforcement. It is a question of using an ordinary drill and drill bit combined with a punch (pin, core), an impact drill or percussion drill with special concrete drill bits, as well as diamond drilling.
You can drill a concrete wall with an ordinary drill, which is used for work on wood and metal. The drill in this case should be different from the usual tool, do not even think about the usual drill. For concrete works nowadays drill bits with a special tungsten carbide tip are usually used (such alloy is called pobedite). When drilling the concrete with this method it is necessary to adhere to a certain sequence of operations. It is worth noting that this method is the most time-consuming and less qualitative among all because of the complexity and quite a long duration of work. To make holes, various notches and grooves in the concrete structure, you will need to provide a variable combination of percussive and rotational impacts on the drilling point. Therefore, the installer in the place under the future dowel will have to alternately pound out a part of the concrete with a puncher, and then remove this mass with an ordinary drill with pobedite drill bit. For this purpose it is necessary to take a metal punch (a pin, an old drill, a core) with the size equal to diameter of a required hole, then to insert a punch in a small deepening preliminary made by the working drill. Blows of a hammer on the face of the punch crumbles the upper layer of concrete, then the resulting hole is partially deepened by the door. Such operations should be repeated until you reach the required size of the hole.
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Currently the most common way is to drill concrete walls with an impact drill or a rotary tool. That way you can carry out the work quickly and efficiently enough. Try to pay attention to reinforcement, which can be embedded in a concrete wall or any other concrete structure.
It is advisable to choose the impact drill for small jobs, without the need for any additional devices and tools. Simply switch the core drill from the normal rotary drill to a rotary impact drill. If the wall to be drilled is made of a particularly tough material, it is best to use a rotary tool. Drilling in this way has many advantages over an impact drill. The drill bit inserted in the chuck of the rotary hammer drills into the wall much more easily so that you can drill through the concrete much more quickly.
There are several reasons for this result. The rotary drill is an electromechanical tool with more power, but its chuck rotates at a slower speed than a drill chuck. However, the impacts of the percussion drill, which are produced by an electropneumatic mechanism, have more force, which is why it drills walls faster and easier. In addition, thanks to the pulse of the special hammer, the amplitude of the progressive motion of the drill in the Peorator is large enough, and it does not depend on human effort. In an impact drill, this rate is much lower, because the impact movement of the drill is ensured by the interaction of special ratchets with small teeth. In addition, the fitter has to exert more physical effort by pushing the drill to achieve better drilling.
Hammer Drill VS Impact Driver | What’s The Difference?
Also note that the high rotation speed of the impact drill chuck, combined with the minimal size of the ratchet teeth, can lead to rapid wear. That is why it is best to choose, though expensive, but also more reliable and durable.
You can drill through the concrete with diamond drilling. Read more about it by following this link
How much do construction percussion tools weigh?
It is necessary to note such an important distinguishing factor as weight category of tools. The rotary tool has not only small dimensions, but also has a small weight. This is due to the use of low-power and high-speed motor, capable of speeds up to 4000 rpm.
Pehorators have more powerful electric motors, which have low speed, but high torque, which is directly reflected in their weight class. There are three types of drilling tools by weight:
- Lightweight. up to 4 kg
- Medium. up to 6 kg
- Heavy. from 6 kg. These are barrel peorators, which in addition to the working mechanisms, have a special compartment for pouring liquid oil
The most powerful impact drill weighs no more than 4kg. The low weight may make it easier to use, but not always. When you need to drill concrete, the weight of the tool plays a big role here. If an impact hammer while drilling must be strongly pressed to the surface of the work material, a hammer drill does not need such action.
Choosing a tool and working with it
When choosing a tool to drill a hole, you should understand that your job depends on it. A good drill accurately drills through a concrete wall or other desired material, making it easier to drill, while a bad drill requires more time, may fail, or complicates the task. What you need to pay attention to when choosing a drill:
- Can the drilling speed be changed??. this point is important, because the speed mode correction will provide accurate work of the drill, helping it not to damage the surface.
- Is it possible to hammer drill and adjust the depth?. Impact drilling can be used on problematic areas by softening them.
- Is it possible to hold the drill with both hands?. The drill is not a light instrument and for this reason, preference should be given to models that are equipped with handles.
- Is the power of the tool adequate for your work?
Once you have decided on a drill, you need to get the hang of it before you start work. To do this, take the drill in one hand like a gun, the other hand is placed on the handle of the tool (if it is not expected by the design, the hand is placed near the chuck). Hold the drill horizontally in your hand so you do not accidentally angle the hole. Wait until the drill is at ambient temperature before turning it on. rapid temperature fluctuations can cause condensation. If you decide to rest while working. unplug the tool from the mains.
Tool for drilling
It is possible to properly drill a concrete wall:
The need for drilling
The need to work on a concrete surface arises:
- The need for wall mounting of furniture (kitchen cabinets):
- hanging of mirrors, pictures, art installations;
- installation of floor plinths;
- fastening of metal or wooden strips for lining with plasterboard, plywood;
- Installing a subcore and other work.
An impact tool is a modification of a conventional drill that works only in drill mode. Added reciprocating motion, creating a shock effect. The drill bit receives torque and simultaneously displacement along the axis with high frequency and low amplitude.
The edge of the cutting part, in contact with concrete, causes the formation of microcracks. The latter increase under the influence of the rotary motion of the drill. The destruction of the monolith, the formation of concrete shavings (dust) takes place. the process of creating a hole is carried out.
Is a hand-held percussion machine for creating holes, grooves, notches. The main difference from the principle of the drill. the tool does not drill, but drills (chisels, punches) a cavity in a solid material. That is, the process resembles surface treatment with a mechanical chisel.
Peorator is a highly specialized tool designed to perform operations specifically on hard and durable building materials on the base:
power, capacity than a drill. Makes deep (up to one metre) holes. Diameter is up to 30~50 cm.
Variety of electric tool
Holes in concrete can be drilled with a battery-powered screwdriver. Power should be at least 750Vt, power supply voltage 14~18V. Professional series have drill with impact function. But, because of limited battery capacity, the amount of work performed is much less than with an impact drill or torch.
Special drill bit for drilling reinforced concrete
If you have to drill a reinforced concrete structure, then it is recommended to purchase a special drill bit for reinforced concrete, which was developed by the German company Bosch. This drill is called the ProDiager, with which you can drill into concrete with rebar inside.
The advantages of using such a nozzle include:
- Possibility to drill holes up to 20 mm in diameter
- Resistant to up to 1,000 holes
- No need to purchase additional rebar drill bits
The Reinforced Concrete Drill Bits have a ULTIMAX monoblock head made of solid carbide. Through such a design, you can not just drill reinforced concrete, but also perform this work at high speed. Reinforced concrete drill bits efficiently drill through rebar, stone, granite and other high-strength materials.
SDS-plus concrete bits have a special design of shank SDS-plus, which allows using it together with ordinary peorators. Bosch has also developed special drill bits for rebar, which are used on the torches. Such drills are available in diameters from 16 to 32 mm, and the depth of the resulting holes ranges from 120 to 300 mm. The disadvantage of such nozzles is that they are quite expensive, so for getting a single hole it is not the best option.
To summarize, we must say that drilled met reinforcement in concrete. it is not easy, but quite realistic. To do this, first make sure that the deformation of the rebar will not cause damage to the concrete base. Try to move away from the rebar, thereby obtaining a curved hole into which you can install a dowel, and screw in the screw. If it is necessary to make a straight hole, but metal is in the way, then you should drill it with special drills. These drills are dozens of times more effective than conventional metal nozzles, but they need to work only in hammerless drilling mode.