Screws for concrete without drilling - type overview and instructions for use

Each of us at least sometimes it is necessary to drill the concrete walls and other solid materials.Installing any of the fastening element is produced by a single method: the hole - channel cleaning - planting sleeves (dowels, wooden "Chopik") - screwing the screw (screws).But is it possible?

who worked with w / w designs, know how in the most "inconvenient" time auger (drill) rests in something does not go further.Well, if it is a pebble.It can crush punch and continue drilling.And if on the way, "rose" rebar?That's right, you need to start somewhere, just shifted, and again.

But in the preparation of "channel" for screwing the screw into the concrete there is another difficulty.Namely - the liner, its diameter.After the drill is chosen not by itself fasteners, and under it.Everywhere it is possible to install it?For example, when attaching the door or window units are often happens that drilling is made close to the outer wall surface.And the thinner the "dividing wall" between her and the hole, the more unreliable is this fixation.

Features fasteners

In appearance these screws are not much different from an ordinary screw.Although there are some specific characteristics, which are determined by destination of products - "concrete without drilling»

1. manufacturing material - stainless steel special strength.This is understandable, because we have to work with solids.
2. Custom thread.Its configuration varies along the length of the product.Such a variable is called a notch, "Nagel".It provides a secure fit of the screw in the concrete.
3. head - usually only a "cross" or "star".This is understandable, since the screwing have to make significant efforts, and conventional slots (slot under the flat-head screwdriver) easily derail.Although there are other of its execution - Hex "turnkey", "barrel" and the like.
4. resistance to corrosion.All hardware have a special coating.
5. sharp tip that is easily "entered" a dense structure (although not all products).
6. Standard diameter - 7.5 mm.A length ranges from 50 to 200 mm.
7. Reusability.This enables the use of self-tapping screws for fixing temporary, removable, portable designs.

Methodology installation

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

If the material is "soft", it is sufficient to screw in place screwing outline point and slightly deepen it.It's easy to make a thin screwdriver "cross", an awl or something similar.

For more dense bases advisable to pre-drill a shallow hole, to get a sort of "guide channel."This will guarantee that the fastening element is not "lead" somewhere to the side, and it is established exactly perpendicular to the surface.

For safe landing metiz enough to take a drill to 2 - 3 mm (eg on sale there, concrete).Therefore, for example, for the base of the w / b, gas silicate determination "without drilling" is not quite correct.Though partially, but still have to use a drill or a hammer.Therefore, in such cases, correct to speak about the installation metiz "without sleeves (dowels)."

cost

Sizes

It basically depends on the length of the screw.If you bought the party (and it is usually 1 000 pieces or more), then made off.In commercially available as a pack (100 pcs.), And "scattering".Retail price starts from 165 rubles / pcs.But it is for products from a reputable manufacturer.Although you can often meet such mount and 25 rubles / piece.If not assumed significant load on the screw, in principle, there is no difference, but the savings is obvious.

Useful tips

When using cellular concrete hole, as we have already explained, drilling is not required.With some effort screw "will" and so (it is recommended to use special hardware for the foam, for example).But in order to sustain the direction, it is advisable to use a special template.Make it easy.Suffice it to a small piece of wood in which a hole was drilled slightly larger than the diameter of fasteners, but the thickness is less than its length.

In some situations, the absence of a drill (depending on the density of the wall material) metiz can try to score, like a nail.But not at full depth, and about 3.1, or to install it insufficiently reliable.And then - to screw.

When drilling the channel diameter is slightly larger cross section of the screw (eg, drill, drill "chats"), is to provide a "blank" fixing the fastener, it is advisable together with him in a hole to insert a little planed match (easiest option).When screwing the wood lured into the channel and seal the existing gap.

Such hardware - an indispensable thing when mounting attachments and masonry.