How to tighten a self-tapping screw without a screwdriver
Don’t Screw Yourself! 3 Tips for Self Tapping Screws
The thing is that home craftsmen often do not know how to screw in a self-tapping screw correctly and how to choose it correctly in general.
What self-tapping screws look like for aerated concrete?
Self-tapping screws are fasteners that are made in the form of rods with heads. They have a special external thread with which they are screwed into the surface. That is, self-tapping screws are rod screws that have been threaded using a special variable method. This method helps to ensure anchoring and good adhesion to concrete structures. The shape of the self-tapping screws resembles a long rod with a pointed end on one side and a round cross-shaped head on the other.
How to fix in a loose wall?
Tell me how best to securely fix in a loose slag wall (house 1964, slag walls plastered with sand-cement.) We need to fix the shelves, mirrors and a wall cabinet. I don’t know how to solve the problem. The usual d / g does not hold, it turns together with the dowel. Need something with a very wide thread.
The simplest option is a self-tapping screw for wood 150-180mm, screw it in carefully until it stops without turning (it may turn out to be unreliable). The most reliable, but expensive, chemical anchor (it will come out only with a bite of the wall). Something in between butterflies. Try, try.
There is such a thing. a mounting bus http: // www. Its meaning is to redistribute the point load. And if it does not stick to the wall, use it. the expansion anchor.
Chemical anchor, everything else is half measures.
special glue for fixing in such walls is sold
Use metal dowels, popularly called “hedgehogs”. They hold reliably. Sold at any point selling fasteners. Good luck. Sergei.
drill 8 d with a drill. and hammer the wood plugs
For reliable fastening (as your situation), the use of metal plates 3 mm thick, 50 mm wide and along the length of the structure is suitable. We attach the plate to the wall and to a metal frame dowel 10 × 150 (for 1 meter 4 pcs.) or under plaster. And for fastening (the heaviest ones) to the plate the most reliable dowel “molly” metal (lighter) self-tapping screw for metal (klopiki) Only in this way.
for sale special nails for slag walls of cinder blocks
Hello. You can use an anchor, (but it has a big hat) Now it’s cheap with serious.Semark the drilling points, make holes with a drill for 10, and hammer square caps (wood) into them, then drill with a 1.5 drill and screw in a self-tapping screw with a standard thread 3. 2
Denis. make holes with a brown diameter above 14mm, then fill it with tile glue and insert the dowel you need in the middle of the hole and screw it on for tomorrow.
Ask an Internet question. there are hundreds of fastener options
chemical anchor mungo or hilty see. expensive, but will disappear only with a wall. or a barefoot option. we drill a hole for example 4, put a liquid nail into it with a syringe and then drive the screw for 4.3-4.5, wait a day, rejoice. )))
drywall fasteners are ideal in your case.
Self-tapping screws for concrete. dimensions and other parameters
How to remove stripped screws – 7 different ways
- silver-colored, galvanized, good for all types of work;
- yellow, galvanized, suitable for interior work, quite suitable for external fastenings, they serve well as decorative hardware;
- black with an oxidized coating, used only for rooms with normal humidity levels.
In order to fix self-tapping screws in different bases, they are specially made with certain thread pitches. Usually, for these hardware, an average pitch and a variable one, with notches, are used. The main characteristics that self-tapping screws for concrete can describe: head dimensions, length, thread pitch. Let’s give an approximate classification, according to this list of parameters.
- Self-tapping screws with an average thread pitch and a universal profile, with their help you can carry out fastenings of various types. Their diameter will be 3-6 mm, and they will be from 12 to 220 mm long. This type of self-tapping screws is the most popular.
- Self-tapping screws also with an average thread pitch, but with a different herringbone profile. They need to be used with dowels, they will have a diameter of 3-8 mm, and a length from 12 to 200 mm.
- The third type is distinguished by self-tapping screws with a variable notch (dowel). Such hardware is used for fastening to concrete walls without dowels, they are 7.5 mm in diameter and 70-200 mm long.
For the latter type of self-tapping screws, the holes must be drilled with special drills for concrete, the diameter of which is about 6 mm, and the depth should be made 10-15 mm more than the selected length of the fastener.
In appearance, such self-tapping screws are not much different from an ordinary screw. Although there are some specific characteristics that are determined by the intended use of the products. “on concrete without drilling”
- Manufacturing material. high quality steel of special strength. And this is understandable, since you have to work with hard materials.
- Non-standard thread. Its configuration varies along the length of the product. This variable notch is called a “dowel”. It provides a more reliable fixation of the self-tapping screw in concrete.
- The head. as a rule, only under the “cross” or “star”. And this is understandable, since when screwing in, you will have to make significant efforts, and ordinary slots (slot for a flat screwdriver) are easy to rip off. Although there are other versions of it. a “turnkey” hexagon, “barrel” and the like.
- Corrosion resistant. All hardware has a special coating.
- A sharp tip that easily “fits” into a dense structure (although not all products).
- The standard diameter is 7.5 mm. And the length ranges from 50 to 200 mm.
- Reusability. This makes it possible to use such self-tapping screws for fixing temporary, removable, portable structures.
General screw-in technology
Use an awl to make a small indentation in the place reserved for the self-tapping screw. Install the product “on position”. Use careful but firm movements to rotate the part until it deeply deepens and locks in the material. Then the force can be increased. Towards the end of the “process”, the speed must be reduced again. so as not to damage the screw.
When working with aerated concrete, a hole, as we have already explained, does not need to be drilled. With some effort, the self-tapping screw will “go” and so (it is recommended to use special hardware for foam concrete, for example). But in order to correctly maintain the direction, it is advisable to use a special template. It is not difficult to make it. A small wooden block is enough, 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 into it, set it to the screwing point, then lean the template against the wall, and you can screw it in. The walls of the bar will not allow the fasteners to deviate from the “screw-in” axis.
In some situations, in the absence of a drill (depending on the density of the wall material), you can try to hammer the hardware like a nail. But not to the full depth, but by about 1/3, otherwise its installation will not be reliable enough. And then. screw it in.
If, when drilling a channel, its diameter turns out to be slightly larger than the self-tapping section (for example, a drill, a drill “dangles”), then in order to provide a more “deaf” fixation of the hardware, it is advisable to insert a slightly planed match into the hole with it (the simplest option). When screwing in, the wood will be drawn into the channel and seal the existing gap.
Depending on the specifics of the work, it is necessary to select self-tapping screws with a specific head. What will be more convenient to screw in. with a screwdriver, wrench, wrench?
Such hardware is an irreplaceable thing when attaching attachments and on brickwork.
Required tools and materials
There are self-tapping screws for concrete, which, without drilling and other preparatory operations, will reliably fix the cladding materials to the walls. It is convenient: any finishing task is significantly accelerated and facilitated. Although experienced builders advise not to be lazy with the preparation of the hole.
General technology of screwing in self-tapping screws
The self-tapping screw does not screw into a smooth surface. First, you need to do one of two things:
carefully with an awl make a hole at the place where the self-tapping screw is screwed in
drill a small hole with a thin drill
Then insert a self-tapping screw into the resulting hole and start carefully so as not to damage the screw-in place and not displace the self-tapping screw, screw it in. As the self-tapping screw deepens into the material and is fixed in it, you need to increase the effort. Towards the end of screwing, you need to reduce the rotation speed again so as not to damage the material and the self-tapping screw (especially its head).
There are requirements for the location of hardware, for example, markings are necessary in order to screw in the necessary fasteners with high quality and at the right distance. There are the following rules for placing self-tapping screws:
- from the edge of the product that is attached, it is necessary to retreat a distance equal to twice the length of this fastener;
- the hole in the wall should be slightly larger than the screw;
- minimum fit of the dowel for light material. 6 cm, heavy. 4 cm;
- the distance between the screws is from 12 to 15 cm, depending on the density of the concrete;
- the diameter of the hole is equal to the cross-sectional diameter of the self-tapping screw together with the dowel.
How to screw a self-tapping screw into concrete
Concrete is often used in the construction of residential buildings and industrial complexes, so during repairs you have to work with this material. You can fix any object to a concrete wall using special screws. pins.
Furniture or confirmation
This type of self-tapping screw requires pre-drilling a hole in the piece of furniture. A hex wrench is used to tighten it.
These are perhaps the most common types of self-tapping screws that are used in various fields of construction. Let’s look at the details of how to screw this or that self-tapping screw into different surfaces.
How to screw in a self-tapping screw without drilling
Not every builder knows how to screw a self-tapping screw into concrete without drilling. There is no need to drill a hole in the walls made of expanded clay or aerated concrete. Just as an additional prepared hole is not required.
For installation in such walls, screws with a dowel are often used. The seal is made of cellophane, nylon and polypropylene. When the fasteners are screwed in, the material begins to delaminate and tightly contacts the wall.
But this type of fastening requires a prepared hole with a drill, the drill of which is selected taking into account the seal. The screw can be screwed in with a standard screwdriver.
The main difference between self-tapping screws for wood is a rare thread, unlike their counterparts intended for metal. These fasteners are available in black, gold and white. So, if it is necessary to fasten a golden hinge on the door, then a golden self-tapping screw is selected accordingly. In most cases, the choice falls on a black self-tapping screw.
Fastening a screw to a concrete wall
Concrete is much stronger than all other building materials, therefore, to drill it, you should use a special drill, which is a product at the end of which there is a carbide insert.
As for the tool, it is best to use an impact drill, if it is not possible to purchase it, the work can be carried out using a conventional drill. But in this case, it will not be easy to drill, but also rotate the drill around its axis during this. Otherwise, the concrete may not budge.
To begin with, the place of the future hole is marked in the wall, and only after that it can be started to drill. The hole depth must match the length of the screw.
The drill gets very hot during operation. So that it does not overheat, it must be moistened with water.
Having made a small indentation, a pre-prepared pin is driven into the hole and rotated. Thus, you need to proceed until the required depth is obtained.
All dust and debris is removed from the hole. After that, a dowel and a screw are inserted into it.
A screw, like a self-tapping screw, is screwed in with a screwdriver; this cannot be done with a screwdriver. Otherwise, it may simply fall out after it hits the end of the hole.