How to choose a drill bit for concrete for a hammer drill or drill: diamond, with a victorious tip
To create holes in particularly strong materials, use a specially designed concrete drill. When using other types, the cutting zone becomes unusable and dull. Before getting started, you need to familiarize yourself with the types of concrete drills for a drill, which are better, how to choose the tools and the better drills.
Drill types and parameters. Distinctive features
Builders ask, when choosing a drill for concrete, how to distinguish its characteristics and make the right choice. Each product is different in size, produced in a given diameter and length. One of the small drill bits for concrete work. 4-5 mm, it is no longer possible to drill a thinner hole of this diameter, its depth will be about 5 cm.
For example, with a diameter of 12 mm or more, the storms will be 1000 mm long, this will be enough to make a through hole in all walls, except for the bunker. Largest diameter. About 30 mm, it is not easy for them to work, there is a heavy load on the perforator, it takes a lot of time for it to cool.
If it is necessary to make a larger hole, a crown storm is used, which has a centering drill and a crown around it. Thanks to this, the process is fast enough, and the load on the rock drill is small.
The cored tempest is coated with diamond plating or veneer from the win. A drill with a victorious tip is set for drilling and hammering, with a diamond one. For drilling mode.
Drilling with a hammer drill
The hammer drill is the most powerful tool, suitable for large volumes of work and for drilling concrete walls.
The Pobedit tip is resistant to heavy loads. When a hole is found at the edge of the drill structure, concrete by the percussion method is not recommended, because A chipping of a concrete structure may occur, and when working with ceramic tiles, the material will simply split.
In this case, it is better to use a diamond drill for concrete for a perforator, it has a greater hardness than a victorious one, during work it is necessary to take breaks to cool it down, drilling at high speeds is prohibited.
The drill diameter is chosen taking into account the fact that when working with dense material, such as concrete, beating occurs during operation. As a result, the hole comes out slightly larger than planned. For this reason, the diameter must be taken slightly smaller than the planned hole. The length of the element indicates the greatest depth that the hole should be.
If stones hit during operation, it is difficult for this element to move on, the stone must be broken with a bump stop, then continue working. When drilling a hole in a wall of a supporting type or in a ceiling, it is recommended to use a puncher, with its help the work can be done as quickly and efficiently.
A reinforced concrete wall is also better than a hammer drill. For a hole in the ceramic on the wall, you cannot use the impact method and use a drill for concrete, otherwise the tile will collapse.
Drilling with a drill
For small work, especially in an apartment with thin walls, you can make a hole with a drill designed for drills for working with concrete. It can be either a win or a diamond piece. A drill with a cylindrical shank is used for an impact drill. When working, it is recommended to select a medium speed. Which concrete drills for a drill are better to choose depends on the type of drill.
How to drill a concrete wall correctly: professional advice
Quite often, during repair work, we have to drill a solid concrete base. Whether it’s holes for a hanging shelf, space for a power outlet, or work on a new ceiling. And the task is quite difficult, as it might seem at first glance. over, concrete. It is highly heterogeneous in composition and extremely dense material.
Let’s see how it is correct and the better to drill concrete at home.
Than drills a concrete wall?
1. Conventional drills are not suitable for concrete. It is better to use solid carbide drills, for example, victory drills. Such drills for concrete have at the ends special brazed inserts made of carbide material (mainly a mixture of tungsten carbide and cobalt in a ratio of 10 to 90%). The carbide tips are easily recognizable. They have the shape of a kind of “house”.
2. If the holes are planned to be few and they are not wide, then at home you can use a drill with
Shock load function. A hammer drill at home is suitable for holes in concrete with a diameter of NOT more than 12-13 mm, otherwise it is better to take a more expensive hammer drill. As for the conventional drill (“hammerless”). For concrete, it is advisable to use it only as a last resort, if you have second working tools at hand.
3. The hammer drill is suitable for any drilling in concrete. It is more efficient due to its “crushing” function, although it is more expensive than an impact drill. In the hammer drill, the rotation of the drill is combined with its reciprocating movement, which makes the drilling work much faster. The hammer drill is good when a lot of drilling work is foreseen (for example, when you need to fasten the lathing to the ceiling or walls). Consider that the puncher. powerful than a drill. Therefore, for example, for aerated concrete (aerated concrete) It is not suitable, as it will completely “collapse” the wall. And when drilling ordinary concrete with a hammer drill, do not overdo it. Take care not to sprinkle plaster.
4. Special drills (“SDS Plus” and “SDS-Max”) of various diameters. From 4-5 mm to 7-8 cm. In order not to buy a very expensive full set of drills, you need to choose drills for a perforator according to the diameter of the future dowel, and just in case “plus or minus” a pair of adjacent ones in size.
5. In addition to drilling with a hammer drill and hammer drill, there is another way. The so-called diamond drilling. Only for this option you need special drilling rigs and diamond drills. This type of concrete drilling is very expensive, and, as a rule, a team of master repairmen is hired for it. Diamond drilling is used in the case when a lot of repair work on drilling a concrete base is planned, or large holes or longitudinal grooves are needed (for example, when laying communications in a wall or floor). The advantage of this method. There is no dust left after the drilling rig. She brings water to the hole, wash away the dust and cool the storms.
Concrete drilling stages
1. Before starting work, be sure to think if there are any communications, cables, etc. in this place, so as NOT to damage anything.
2. Next, check that there are no old stains and dirt in the place of drilling, otherwise clean the surface well.
3. The outer part of the concrete is usually looser than the inner layers. Therefore, before starting drilling in concrete, be sure to mark and expand the point of the future hole, that is, deepen (punch) the base of the drill entry in this place. This is to ensure that the drill does NOT slide or move to the side. For the core, you can use a hammer and a large sharp nail, a self-tapping screw or a special dowel.
4. During work, keep the working tool perpendicular to the concrete base, otherwise the risk of the drill breaking will increase.
5. If you drilled a hole with a hammer drill, switch modes from time to time. In order to “hit” the surface, turn on the “hit” option in the drill.
6. As drills, as well as drills (hammer drill) it is necessary to give “rest” from time to time. Approximately every 10-15 minutes. Suspend work.
7. Another such moment. The same victorious drills DO NOT like overheating, therefore, with a strong operating load, their tips must be periodically cooled with water.
8. For concrete work, you will also need a triangular solid steel punch and a regular hammer. Suddenly there will be rubble in the concrete. By the way, an old winder drill is also suitable as a punch. If during the drilling process there are reinforcement or stones (Crushed stone), they are removed separately. Reinforcement can be processed with ordinary tools (punch and Traditional drill for metal), but stones only lend themselves well to the Punch.
9. Suddenly, you urgently need to make a couple of holes for the shelf, and only a regular drill is at hand (without impact mode), then during the drilling process, if necessary, you can periodically insert the Punch into the hole and make several blows on it with a hammer, and then turn it in the hole , later. Drilled again with a drill, etc. Do not forget that the same drill must be carbide.
10. Periodically remove cement chips and dust from the working hole. They interfere with drilling. They can be removed with a vacuum cleaner or natural brush.
11. If the drill is stuck. Do not loosen it, but carefully detach the tool, then put on the larger diameter drill and release the stuck tip, being careful NOT to touch it.
12. Drill holes in concrete need 1 cm longer than the length of the dowel, so that the latter will easily fit into the wall.
How to drill a concrete hammer?
- A set of drills and drills
- Power tool skills
Looking back, experienced craftsmen, probably with a shudder, recall the times when working with concrete walls was associated with a sledgehammer, bolt, it is good if there was a construction dowel gun. And how good it is now! A handy, powerful, affordable tool like a hammer drill removes a lot of problems. Like any professional construction technician, it certainly requires certain skills. So, how to drill a hole in concrete with a hammer drill?
It is necessary to determine the purpose of the planned holes, their number, diameter, depth. Prepare, in accordance with this, the necessary borax. All hammer drills (with a few exceptions) have a slotted SDS-plus connector in the tail. Before the introduction of brown, a thin layer of grease is applied to the shank for free translational movement in the chuck. In order not to worry about the speedy question of “how to remove the cartridge from the perforator” for replacement, in order to restore the performance of the entire tool (and this is a rather laborious process), the cartridge should always be kept as clean as possible, lubricated.
When choosing a drill, it must be remembered that if there is a need for a hole of great depth, then first you should go through with a short (350 mm) drill, and then continue with a long one. (800-1000). The weak point is brown. At their foundations. And this is the rule. Precisely to avoid breakage. Everyone probably knows how to use a puncher. The tool switches to chiselling without rotation, the required chisel is inserted, and the desired groove depth is selected from the markings. But when drilling concrete. There are features. You should not drill a plumb line to the full depth at once in one pass, but it is better to do this in several steps, which allows you to cool the drill and remove excess rock from the hole.
A good craftsman, knowing how a perforator works, feels well the required level of force applied, depending on the characteristics of his tool and the material of the wall. As a rule, much effort is not required. You should constantly monitor the process, in readiness to take the necessary measures if an unforeseen obstacle appears on the way (reinforcement, embedded metal sheet). In no case should you decide by force. Like to squeeze harder. And it will go! So you can “put the squeeze” on the problem “how to fix a puncher”, or “where to get money for a new one”.
And further. In a good master in his “arsenal”, a wire and fittings detector is desirable. This will make it possible to mark holes with a minimum likelihood of meeting “uninvited guests” and greatly facilitate the work. If such a meeting cannot be avoided. You need skills to overcome THESE obstacles and a set of necessary Drills and drills.
Instrument weight groups
There are three groups of perforators, depending on their weight:
- Lightweight punchers. This group includes instruments weighing NO more than 4 kg and power up to 800 watts. The impact energy of such perforators rarely exceeds 3 J. Such a tool is intended for home use;
- Perforators of the middle group weigh 4-8 kg. Their power is 800-1200 W, and the impact energy. Approximately 10 J. These rock drills are professional equipment and can work even with reinforced concrete. Basically, they are used to work in two modes. Drilling with a blow and just a blow;
- The heavy group includes perforators weighing more than 8 kg, power. From 1200 W and impact energy. Here are 13 J. With their help, they make breaks and holes in surfaces of concrete and natural stone with a diameter of more than 40 mm.
Drilling concrete with a hammer drill
Concrete. A very strong material with a heterogeneous structure, so it is rather difficult to drill it. Today, the most common way to create technological holes in concrete is drilling with a hammer drill. This method allows you to create holes quickly and with good quality.
Punch use recommendations
When drilling holes with a hammer drill, it is recommended to observe the following rules:
- When drilling hard surfaces, use lubricant and coolants;
- Before using long brown lengths, it is recommended to first drill with a shorter bit;
- In order to prevent the spilling of porous and loose materials, their processing should be done in the drilling mode;
- After drilling 170-180 holes, the drill shank is cleaned of dust, wiped with a dry cloth and greased with grease;
- When using a professional punch, the periods of continuous work and rest are alternated (working time. 30 min., Break. 10 min.)
- A break must be done when a part of the housing is very hot at the location of the gearbox;
- It is strictly prohibited to cool the perforator by lowering it into water;
- It is not recommended to increase the impact force of the hammer drill by increasing pressure on the surface to be treated.
After completing the work, the punch is turned off and cleaned with a soft cloth. If necessary, use a cloth soaked in soapy water.
Reinforced concrete drilling
For drilling holes in reinforced concrete, conventional drills are not suitable, since they simply cannot withstand high loads. The most effective way of drilling reinforced concrete today is the use of diamond tools. With the help of such a tool, you can get holes with pinpoint accuracy Corresponding to a given diameter and depth.
The essence of the technology is that a tool with diamond cutting segments allows you to make holes of different diameters and depths without any damage to the bearing elements of buildings. This is the main advantage of this drilling method in comparison, for example, with carbide drills or a jackhammer. When drilling with a diamond tool, the walls do NOT experience vibrations, so their structure is preserved in its original form.
Among the advantages of diamond drilling should be noted:
- Almost one hundred percent accuracy of the shapes and sizes of holes;
- Lack of a lot of dust and noise;
- High speed of work execution;
- The ability to use the tool in hard-to-reach places and in a wide variety of conditions.
Depending on the class of the hammer drill, the spindle rotation speed can be from 600 to 1500 rpm. As the productivity and power of the rock drill increase, the rotational speed decreases. This is due to the design features of this tool. In productive models, the diameter of the tooling can be quite large. A small diameter storm has to rotate quickly, and a large one. Slowly, otherwise it will wear out very quickly.
Rotary hammers with high speed have quite an impressive weight, which does NOT facilitate ease of use at all. In addition, spiral grooves wear very quickly in high speed models designed to remove drilling waste from the job site. The appliance starts to get very hot because of this.
Rotary hammers can be equipped with the following additional functions:
- Gear shifting mechanism. It will be useful when changing from drill to drill and vice versa. After all, these tools operate at different speeds;
- Drilling depth stop. With its help, it is easy to determine whether the drill or drill has reached the required mark;
- Stabilization of the spindle rotation frequency with fluctuations in load forces;
- Soft start and special device for overheating protection;
- Reverse shaft rotation. Such a function will be needed when the drill gets stuck in the hole being machined;
- Anti-vibration system that compensates for the shaking of the rock drill when drilling, drilling or chiselling;
- Dust protection during operation;
- Locking button used to secure the punch in working mode.
As you can see, the hammer drill has a number of advantages compared to other tools that perform similar tasks:
- First, there is a separate mechanism responsible for the blow. This mechanism gives the perforator the ability to realize three modes of operation, that is, it is capable of simply drills, drills with a blow and to carry out only a shock effect;
- Secondly, rock drills have an SDS system for clamping equipment. Its design features ensure reliable fixation of the equipment and its free movement. In addition, the installation of tooling in the SDS system does not require the use of additional tools, which significantly saves working time;
- Thirdly, as a result of the first two advantages, the rock drill is capable of drilling holes in materials that are quite difficult to process, for example, in concrete and natural stone.
For drilling in concrete, drills with a carbide or diamond tip are used. This tool can be used to make a small hole (no more than 14 mm).
Shank shape differs from drills. Drills are considered a disposable tool, since they cannot be sharpened and are thrown away after their resource is used up. Their advantage is that they are able to remove concrete chips obtained during the drilling process from the hole. It is advisable to use this tool when drilling deep holes, including through holes. The drill can be used to drill holes with a diameter of 4 to 80 mm.
When drilling holes with a drill, reinforcement is a certain hazard. As a rule, a drill immediately burns out after a direct hit on the metal. If the tool passes tangentially to the reinforcement element, then it simply jams and further drilling becomes impossible. Therefore, for reinforced concrete, it is more advisable to use diamond core bits.