How to screw a screw into a wall without a drill

Turbo screws. or how to screw a self-tapping screw into concrete

Products are available in different sizes, they differ in thread, color and configuration of the head. Each type is designed for a specific task, which must be considered when using hardware products.

Depending on the type of head, all self-tapping screws can be divided into several independent groups.

Varieties with countersunk head. Such models most commonly have a tapered design with cruciform slots. To work with this kind of variety, you must first prepare the landing place. To do this, you need to make a small chamfer, which will place the end so that it is in the plane of the material. Models with this type of head structure will not overhang the concrete surface after installation. Nowadays there are variants with a reduced head. They have a smaller diameter, provide a more secure hold, but require more force to install.

screw, wall, drill

Screws can also be subdivided into separate categories, depending on their protective coating. Many models are made with a special oxidized coating. The latter has the appearance of a thin oxide film, which gives the parts a black color. Such variants can withstand considerable loads, but do not forget that in the process of operation they should not be in contact with moisture.

There are also models coated with phosphated compositions. These models, like the previous version, will be painted black. They too can hold a material of considerable weight, with good resistance to water. The cost of such models will be higher in comparison with other types.

Galvanized self-tapping screws on concrete can be white or yellow, but they do not differ from each other in important properties. These models are most often used to install products that will be located outdoors, as these screws have a special resistance to various atmospheric influences.

Self-tapping screws are also classified according to the material from which they are made. The most common option is high-strength and quality carbon steel. Such a base is considered sufficiently strong. Most often it is used together with impurities. In addition, this metal is particularly durable. Fasteners made of this metal are relatively inexpensive.

Also for the production of these screws can be used and conventional stainless steel. This material will be the best option in the event that in the future may be in contact with moisture fasteners. After all, models made of such material will not rust and will not lose their properties.

As a rule, stainless steel self-tapping screws are not coated with additional protective coatings. Because this kind of metal has nickel and chromium in its composition, which provide excellent anti-corrosive properties of the products.

There are also special types of decorative self-tapping screws. They are most often made of wood, plastic or various non-ferrous metals. But such samples are very rarely taken for concrete surfaces, because they can not withstand too high loads.

There are different sizes of self-tapping screws for concrete. They are chosen depending on the thickness of the surface and the diameter of the holes to be made.

The tools can have different thread configurations.

  • “herringbone. This type is a slightly inclined thread, which is formed by small metal cones embedded in each other. The model in the form of “herringbone” most often has a section of 8 millimeters.
  • Universal. This thread on a self-tapping screw can be used both with and without a dowel. As a rule, tools are available up to 6 millimetres in size.
  • With a variable thread pitch. These samples with a variable pitch provide the most secure attachment of materials, while additionally performing notches. It is this type that is more often found on self-tapping screws without drilling. The standard value of the diameter of such fixtures is 7.5 millimeters.

The length of these devices can vary from 50 to 185 mm. The depth ranges from 2.3 to 2.8 mm. Cap height reaches values of 2.8 to 3.2 mm. The diameter of these screws can be from 6.3 to 6.7 mm

The thread pitch is also important. For different models, it can reach a value of 2.5-2.8 mm

Self-tapping screws for concrete without drilling. overview of types and instructions for use

Every one of us at least occasionally has to drill into concrete walls and other hard materials. Installation of any fastening element is carried out according to the same method: hole. cleaning the channel. planting a sleeve (dowel, wooden “chopik”). screwing in a self-drilling screw (screw). But is it always possible?

Who has worked with reinforced concrete structures, knows how at the most “inopportune” moment the drill (drill bit) encounters something and goes no further. It is good, if it is a pebble. It is possible to crush it with a puncher and continue drilling. And if a reinforcing bar gets in the way?? Right, you need to start in another place, with a little displacement, and start all over again.

But when preparing the “channel” for screwing a self-tapping screw into the concrete, there is another difficulty. Namely the sleeve, its diameter. After all, the drill bit is not selected for the fastener itself, but for it. Can it be installed everywhere?? For example, when fastening door or window units, it often happens that drilling is carried out close to the outer surface of the wall. And the thinner the “partition” between it and the hole, the more unreliable such fixation will be.

Features of fasteners

In appearance, these self-tapping screws do not differ much from an ordinary screw. Although there are some specific characteristics, which are determined by the purpose of products. “on the concrete without drilling

  • Material. high quality steel of special strength. Which is understandable, since you have to work with hard materials.
  • Non-standard threads. Its configuration varies along the length of the product. This variable notch is called a “dowel”. It provides a more reliable fixation of a screw in concrete.
  • The head. as a rule, only for “cross” or “star”. And this is understandable, since it is necessary to apply considerable force when screwing in, and the usual slots (flat screwdriver slot) can easily be torn off. Although there are other types of its design. hexagonal “key”, “barrel” and the like.
  • Resistance to corrosion. All fasteners have special coating.
  • A sharp tip that easily “enters” the dense structure (although not all products).
  • The standard diameter is 7,5 mm. And the length is in the range from 50 to 200 mm.
  • Reusability. This makes it possible to use these self-tapping screws to fix temporary, removable, portable structures.

Installation technique

In principle, it is the same for different concretes, the only difference is where to start.

If the material is “loose”, then it is enough to mark a point in the place of screwing in the screw and deepen it a little. It’s not hard to do with a fine Phillips screwdriver, awl, or something similar.

For a tighter substrate, it is advisable to pre-drill a shallow hole to create a kind of “guide channel”. This will ensure that the fixing element will not “move” somewhere sideways, and it will be installed exactly perpendicular to the surface.

For a secure fit is enough to take a drill 2. 3 mm (such are on sale, the concrete). Therefore, for example, for a base of reinforced concrete, gas silicate definition of “no drilling” is not quite right. At least in part, but to use a drill or torch will still have. Therefore, in such cases, it is more correct to talk about installing hardware “without a sleeve (dowel)”.

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When working with cellular concrete hole, as we have explained, it is not necessary to drill. With some effort screw “will go” and so (it is recommended to use special hardware for foam concrete, for example). But in order to correctly align the direction, it is advisable to use a special template. It is not difficult to make. Is enough a small wooden bar in which a hole is made slightly larger than the diameter of the fastener, but less thick than its length.

You just need to insert a self-tapping screw, set it to the screw-in point, then lean the template against the wall, and you can screw in. The walls of the bar will not let the fastener to deviate from the axis of “screwing”.

In some situations, in the absence of a drill (depending on the density of the material of the wall), you can try to hammer the metiz, as a nail. But not to the full depth, but about 1/3, otherwise its installation will not be reliable enough. And then. to screw in.

If when drilling the channel, its diameter turns out to be slightly larger than the cross section of the self-drilling screw (for example, the drill, the drill “dangles”), then to ensure a more “dull” fixation of the hardware, it is advisable along with it in the hole to insert a slightly cut match (the simplest option). When screwed in the wood will be drawn into the channel and will seal the existing gap.

Depending on the specifics of the work necessary to pick up screws with a certain head. What will be more convenient to screw in. a screwdriver, a wrench, a screwdriver?

Such hardware. an indispensable thing when attaching mounted equipment and on masonry.

Types of screws

To begin with, a screw is a cylindrical rod with a special head, to which the screw groove is applied. Screws are produced according to a number of normative documents, including GOST 1144-80, GOST 1145-80, etc. д.

Screw

At the same time, there are two main types of metalware are:

The diameter and length of the screw (for example, a product with a diameter of 5 mm and a length of 3.5 cm will be referred to as 5×35 mm) are used for the designation in this case. In addition, hardware can be classified according to the shape of the slot and the features of the head itself:

Types of screw heads All of these varieties are made with a cross-shaped slot, with a straight (flat) and a Torx slot (the latter is also known as “star”), as well as with an internal hexagon and other, less popular variants. There are also self-tapping screws with a head of six- and octagonal shape (roofing), which are also made with different slits.

For your information! According to the type of thread screws are also divided into several varieties, which is primarily determined by the connected materials and the specific purpose (metal, wood, plasterboard or small appliances).

For wood

The main difference between self-tapping screws for wood. a rare thread, in contrast to their counterparts designed for metal. Such fasteners can be black, gold and white. So, if it is necessary to screw a golden hinge on the door, then accordingly a golden self-tapping screw is chosen. In most cases, however, the choice falls on a black self-tapping screw.

Metal

As already mentioned, the thread on such a screw has a frequent pitch. The reason for this is that the metal is a rather hard material, so the bond must be made strong. over, some metals should not be pre-drilled, such as tinplate. As for the thicker metals, you will need to make a hole.

Roofing

Such self-tapping screws are used for fixing roofing sheet material. It is necessarily equipped with a sealing rubber. As a result, the connection is not only strong, but also airtight.

Furniture or screwdriver

This type of screw requires pre-drilling a hole in the furniture workpiece. A hexagon wrench is used to tighten it.

These are probably the most common types of self-tapping screws that are used in various areas of construction. Let’s look at the details of how to drive screws into different surfaces.

Into metal

As for screwing a self-tapping screw into metal, only metal fasteners are used here. The method of screwing depends on the thickness of the workpiece. If it is a thin sheet metal, you can often screw it in without much effort with an electric screwdriver or screwdriver. over, there are different types of self-tapping screws. Some have a small drill bit on the tip with sharpened teeth, as shown in the picture.

Screwdriver with a drill bit with sharpened teeth But as practice shows, not all such self-tapping screws can be screwed into the metal, this is explained by the weak sharpening of the drill. So, to screw them in an electric screwdriver is used. You should not dial in large revolutions, otherwise the screwdriver can overheat and quickly become blunt. These fasteners can be used for metal up to 7 mm thick.

If the metal is too thick, then the best option is to pre-drill a hole with a drill/drill, and then screw the fastener into it. This method is not associated with any problems.

When making the hole, remember that its diameter should be smaller than that of the screw. When the hole is ready, it can be lubricated with machine oil. This will allow you to screw in the screw without much difficulty.

The metal screw used must be made of hard steel, which is harder than the product.

Concrete screw. application

Self-tapping screws are effectively used for fixing metal, plastic, wooden door and window frames, fireproof doors, hinged products, lightweight concrete, blocks with cavities. that is, in any type of repair and finishing works.

When working with heavy concrete is recommended to conduct a preliminary preparation of the landing hole, when working with lightweight. self-tapping screws are screwed in without preparation.

Selecting the drill bit:

  • Choose a drill, the diameter of which is 2-3 mm less d screw;
  • The drill is fixed in the chuck of a torch or an electric drill;
  • If the use of an electric drill in drilling mode is implied, a universal drill or a special drill for concrete can be used;
  • if an impact drill or a rotary tool is used, it is better to use the special drill bit with grooves on the cylindrical surface of the shank.

Self-tapping screw. how to use the fastener on dense substrates

Galvanized steel screw on concrete. dowel is used for installation. How to screw a self-drilling screw into concrete?

The sequence of operations is as follows:

  • A hole is drilled on the surface. The depth is selected on the basis of the length of the product. it is taken with a margin of a few mm. This is necessary to collect the concrete dust that forms when the screw is screwed in;
  • When working to avoid deviations from the axis of drilling, otherwise there will be a diameter error and the hardware will not hold;
  • debris is removed from the resulting hole;
  • The part to be secured is set in place before the screw is screwed in;
  • screw in the screw with a screwdriver or an electric screwdriver at a very low speed.

In the absence of any tool you can use an old drill bit of the required size and a hammer. The drill is placed perpendicular to the surface, it is struck 2-3 times, the drill is rotated and struck again. This is done until the hole of the desired length is worked out.

How to screw in a screw without drilling, video

When working with lightweight concrete. expanded clay aggregate concrete, gas, foam concrete is not allowed to pre-prepare the hole. To create full contact with the base are used self-tapping screws on concrete without drilling concrete.

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The master can use another method of fixing. a screw with a dowel. The body of the seal is made of polyethylene, polypropylene, or kapron and is divided into equal parts by longitudinal slits. As it is screwed in, the material is flattened, which ensures full contact.

Hole preparation required for this type of fastener. Drill must be matched to the thickness of the sealant, slightly more than its length. The sealant must fit easily into the prepared hole, but provide a tight fit. The product is screwed by electric or hand tool through the part to be fastened.

Reference information

To calculate the load, it is recommended to read the table data:

Load, kg Fastener size
Up to 1.00 316
Up to 5.00 320
Up to 10.00 430
Up to 20.00 470
Up to 30.00 550
Up to 50.00 660
Up to 75.00 880
Up to 100.0 10100

Standard sizes of self-tapping screws on concrete with pre-drilling are listed in the table data:

Concrete screw. dimensions
D inside, mm 7.5182 7.5152 7.5132 7.5112 7.592 7.572 7.552
7.35-7.65
D outside, mm 6.30-6.70
Thread pitch, mm 2.55-2.75
D head, mm 10.82-11.80
Head height, mm 2.80-3.20
Type and depth of slot, mm TORX 2.30-2.70
Length, mm 180184 150154 130134 110114 9094 7074 5054
Tightening torque, kNm 20.00
Min. Breaking out force, Kn 2.50
D drill, mm 6.00

Anchoring and drilling depth:

Material Min anchorage depth, mm Min drilling depth in the wall structure, mm
Lightweight concrete 60.00 75.00
Heavy concrete 30.00 48.00

Concrete screws. application

Self-tapping screws are effectively used for fixing metal, plastic, wooden door and window frames, fireproof doors, hinged products, lightweight concrete, blocks with cavities. that is for all types of repair and finishing works.

When working with heavy concrete is recommended to carry out preliminary preparation of a landing hole, when working with light. the screw is screwed in without preparation.

  • Drill a diameter of which is 2-3 mm less than the d screw;
  • The drill is fixed in the chuck of a pen or an electric drill;
  • If you intend to use an electric drill in drilling mode, you can use a universal or special drill bit for concrete;
  • If an impact drill or a rotary tool is to be used, it is better to use the special drill bit with grooves on the cylindrical surface of the shank.

Screwdriver. how to use the fastener on solid bases

For installation uses a galvanized steel screw on the concrete. dowel. How to screw a self-tapping screw into concrete?

The sequence of operations is as follows:

  • A hole is drilled on the surface. The depth is selected based on the length of the product. it is taken with a margin of a few mm. This is necessary to collect the concrete dust, which is formed when screwing in the screw;
  • when working, it is necessary to avoid deviations from the axis of drilling, otherwise there will be a diameter error and the hardware will not hold;
  • debris is removed from the resulting hole;
  • The part to be secured is set in place before the screw is screwed in;
  • the screw is screwed in with a screwdriver or an electric screwdriver at a very low speed.

In the absence of any tool, you can use an old drill bit of the required size and a hammer. The drill is placed perpendicular to the surface, it is struck 2-3 times, the drill is turned and struck again. Proceed in this way until the hole of the desired length is worked out.

How to screw in a self-tapping screw without drilling, video

When working with lightweight concrete. expanded clay aggregate concrete, aerated concrete, foamed concrete do not allow pre-preparation of the hole. To create full contact with the base are used self-tapping screws on concrete without drilling the concrete.

How to screw in?

To ensure that the screw could screw in sufficiently firmly into the concrete and provide a firm hold on the entire structure, you must first check the material itself. If the concrete is “loose” and a little crumbly, you should first make a small cavity at the point where you will insert the fixture.

screw, wall, drill

The hole for the screw can be made with a Phillips screwdriver. If it is not available, use an awl, but it is better not to use a drill. The recess made will not allow the element to go sideways when installed. It will be fixed strictly perpendicular to the surface.

In the process of screwing the screw will begin to delaminate the material. Some rules must be taken into account when installing the fasteners. Remember that the length of the fixer must be significantly less than the thickness of the concrete. Otherwise the tip of the fastener will simply be on the outside of the other side.

Depending on the density of the concrete base distance between individual screws without drilling should be 12 to 15 centimeters. If you are fastening the edges of products made of concrete, then a small distance should be set back from it. It must be twice the length of the fixing itself.

The following video describes how to drive a screw into concrete.

Methods of screwing self-tapping screws on concrete

The connection unit with the use of self-tapping screws is made in two ways:

The choice of fixing method depends on the magnitude and nature of the load taken, the base material.

If the parts are massive, the construction experiences vibration, the concrete is of the cellular class. additional bonding area is required. It is arranged with a dowel. a sleeve made of plastic or metal with lobes, spikes, spacer hooks or slits.

The dowel is placed in the prepared hole, hammering with a hammer. When a screw is driven in, the material wedges into the concrete body, creating additional expansion.

Self-tapping screws without preliminary drilling and sealant installation are used for fixing window and door frames and light curtain walls to porous concrete. The hole in the base is formed by embedding the sharp end of the anchor into the material. Sufficient reliability of the connection is provided by threads with notches and a variable pitch.

Range and sizes

There are several types of designs of this material. They are divided into hexagonal and rectangular.

Hexagonal self-tapping screws for concrete are cone-shaped or cross-shaped slot. This kind of screws are screwed with the help of a ring spanner or open-end wrench. Rectangular form is characterized by a rounded head, such a feature of the product allows you to hang the screws mounted structures.

These types of fasteners are sold in all construction stores. It is better not to buy on the market, because the screws are made of stainless steel and have a rounded head.к. It is not uncommon for sellers to deceive customers who are not familiar with this type of product.

Books :

Problems of concrete technology. Robert Lhermit. 542. link to book review Special concretes. Leonid Dvorkin. 528. link to book review Handbook of the building technologist. Gennady Badikhin. 239. link to book review Modern building materials. A. Svatkov. 510. book review link

There are a large number of devices that are used in construction works for fixing. To attach various equipment, doorway or insulation use fasteners. self-tapping screws for concrete.

Assortment and sizes

There are several types of designs of this material. They are divided into hexagonal and rectangular.

Hexagonal self-tapping screws for concrete. it is a cone-shaped or cross-shaped slot. This type of screw is screwed with a ring spanner or open-jaw wrench. Rectangular type is characterized by a rounded head, such a feature of the product allows you to hang on the self-tapping structures.

These types of fasteners are sold in all construction stores. It is better not to take the product at markets, because it is not possible to use it.к. It is not uncommon for sellers to deceive customers who are not knowledgeable about this type of product.

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Also, self-tapping screws differ in the way they are machined, which comes in the following types:

Darkened type of self-tapping screws are the most fragile, t.к. susceptible to moisture. For this reason, it is not recommended to use this type of product in places with high humidity. Copper-coated rivets are sensitive to temperature fluctuations. For this reason they are only used indoors. The most common model is galvanized screws, this type can be used in all conditions.

To select the fastener for a concrete wall, you should consider a number of parameters. For example, the head height must fall within a range of 2.8 to 3.2 mm. Cap diameter should be 10.8-11.8 mm. The depth. from 2.3 to 2.8 mm. The length of the screw can be from 5 to 18.5 cm.

screw, wall, drill

The size of the inner cross-section is 5.1 to 5.5 mm and the outer cross-section fits within the range of 7.3 to 7.7 mm. Outer diameter is 6.3 to 6.6 mm.

Safety precautions

Screwing screws into concrete is considered safe work, but do not make the mistake of thinking that you can not injure yourself in the process. The safety precautions must be observed as rigorously as in other operations. Handling a screwdriver, drill and torch requires experience and an understanding of how these tools work and their dangers. Recommendations on how to use concrete self-tapping screws:

  • It is forbidden to wear gloves when working with the drill, as they can get caught up in the drill bit, resulting in severe hand injuries;
  • Before replacing the drill bit, allow it to cool down by putting it in water;
  • Wear safety glasses when drilling, otherwise a piece of material could break off and enter the eye;
  • When a foreign body does get under the eyelid, it is necessary to rinse the eye immediately with plenty of water;
  • If pain or redness in the eye does not subside within a few hours, consult a doctor;
  • During work with power tools, you need to remove children from the room and make sure they do not come in, because a child can grab the wire and try to stick the plug in the socket, hurt himself with a stabbing or cutting edge, etc. д. ;
  • no animals allowed in the working area.

To avoid injuries it is not recommended to work under the influence of alcohol or drugs. The right choice of a self-tapping screw and compliance with the algorithm of work is the key to reliable and durable fastening.

The main points in a nutshell

Ordinary universal screws, complete with a plastic sleeve-dowel allows firmly fix any structures on a concrete base. But even more reliable are dowels. special screws for concrete with a special thread. Its ribs can easily gnaw into dense material, making spiral grooves in it. When choosing such fasteners should take into account the conditions of its use and the availability of tools for installation. it must fit the slits or shape of the screw head.

There are requirements to the location of hardware, for example, you need to mark to qualitatively and at the right distance to screw the required fasteners. There are the following rules for placing self-tapping screws:

  • From the edge of the product, which is attached, you must step back a distance equal to twice the length of this fastener;
  • the hole in the wall must be slightly larger than the screw;
  • the minimum dowel fit for light material is 6 cm, for heavy material. 4 cm;
  • The distance between the screws from 12 to 15 cm, depending on the density of the concrete;
  • the diameter of the hole is equal to the diameter of the cross section of the screw and dowel.

Cost

Each of us at least sometimes has to drill concrete walls and other hard materials. Installation of any fastener is made by the same procedure: hole. cleaning of the channel. landing a sleeve (dowel, a wooden “chopik”). screwing the screw (screw). But is it always possible?

Who worked with reinforced concrete structures, knows how at the most “inopportune” moment the drill (drill bit) encounters something and goes no further. It is good, if it is a pebble. It can be crushed with a punch and continue drilling. And if a reinforcing bar gets in the way? That’s right, you need to start in a different place, slightly shifted, and everything again.

But in the preparation of the “channel” for screwing a self-tapping screw into the concrete, there is another difficulty. Namely, the sleeve, its diameter. After all, the drill bit is selected not under the fastener itself, but under it. Can it be installed everywhere? For example, when fixing door or window units, it often happens that drilling is carried out close to the outer surface of the wall. And the thinner the “partition” between it and the hole, the more unreliable such fixation will be.

Features of fasteners

In appearance, these screws do not differ much from an ordinary screw. Although there are some specific characteristics that are determined by the purpose of the products. “on concrete without drilling”

  • The material of manufacture. high quality steel of special strength. And this is understandable, since you have to work with hard materials.
  • Non-standard threads. Its configuration varies along the length of the product. Such a variable notch is called a “dowel”. It provides a more secure fixation of the screw in the concrete.
  • Head. as a rule, only for “cross” or “star”. And this is understandable, since when screwing in you have to apply considerable force, and the usual slits (slot for a flat screwdriver) is easy to tear. Although there are other designs. hexagonal “key”, “barrel” and the like.
  • Corrosion resistance. All fasteners are specially coated.
  • A sharp tip that easily “enters” into a solid structure (although not all products).
  • Standard diameter is 7.5 mm. And the length lies in the range from 50 to 200 mm.
  • Reusability. This allows the use of such self-tapping screws for fixing temporary, removable, portable structures.

Installation technique

In principle, it is the same for different concretes, the only difference is where to start.

If the material is “loose”, it is enough to mark a point at the place of screwing in the screw and slightly deepen it. It is easy to do with a thin screwdriver “cross”, awl or something similar.

For a denser substrate is advisable to pre-drill a shallow hole to get a kind of “guide channel”. This will ensure that the fastener will not “move” somewhere sideways and it will set exactly perpendicular to the surface.

For a secure fit is enough to take a drill 2. 3 mm (such are on sale, the concrete). So, for example, for a base of reinforced concrete, gas silicate, the definition of “no drilling” is not quite right. At least in part, but you still have to use a drill or torch. Therefore, in such cases, it is more correct to talk about the installation of hardware “without a sleeve (dowel)”.

Cost

It depends mainly on the length of the screw. If you buy a batch (and this is usually 1,000 pieces or more), then a discount is made. Sold in packs (100 pcs.), as well as “placer”. Retail price starts at 165/pc. But this is for products from a well-known manufacturer. Although you can often find similar fasteners and for 25 /pc. If a significant load on the screw is not expected, then in principle, there is no difference, and the savings are obvious.