How To Install A Blade On A Hacksaw For Metal

9th January 2021

How to install a blade on a hacksaw for metal

The design of the tool in question allows for quick replacement of the hacksaw blade. It should be borne in mind that if a mistake is made, the product in question will not serve for a long period. How to install a blade in a hacksaw for metal is a very common question, since this tool is found in almost all home workshops. The main recommendations include the following:

The instruction largely depends on the fastening system used in a particular case.
The threaded clamp is widespread, in which the hacksaw blade is installed and stretched. A sudden change in the applied load becomes the reason why you have to periodically check the degree of tension.
There are lever-type tools. In this case, the installation is greatly simplified, since it is enough to pull the lever and install the hacksaw blade for cutting metal, and then tighten it in the opposite direction.

When considering how to correctly insert the blade into a hacksaw for metal, it should be borne in mind that after proper installation it creates a slight ringing during operation and may vibrate slightly. However, at the time of sawing, the product should not change its position, as this may damage the mounting holes.

How to cut?

Since you were interested in the question of installing the blade, it means that advice on how to use a hacksaw for metal will not hurt. Grasp with one hand (right if you are right-handed or left-handed if you are left-handed) by the handle of the hacksaw, with the other. by the vertical edge of the hacksaw arc opposite to the handle. Place the canvas on the cut line. Guide the blade straight in the direction of the cut line. Keep the angle of the hacksaw small. The web should almost rest on the part, usually at an angle of 30-45 degrees. This will result in less vibration, less noise, and a smoother cut line. Cutting across the material, with an angle of 90 degrees, is only worthwhile in emergency cases, for example, when turning the mowing line of the cut. The smoother the line you need to cut, the smaller the angle of inclination.

The first movements should be done with little effort so that the blade cuts into the material and does not slip away from the cutting line. Making smooth movements, strictly forward, press the hacksaw to the part when moving forward and release the pressure when returning to its original state. When the canvas clings to the material, you can work with full force.

The range of motion is maximum, from the edge of the blade to the edge, without hitting the part with the arc of the hacksaw. There is no need to “mark time”. this way you will quickly erase the canvas in one area and have to throw it away, because it is impossible to use the damaged canvas. Keep the arc of the hacksaw straight, do not let it bow in different directions. The direction of cutting corresponds to the plane of the hacksaw arc, so bumping is contraindicated here. In addition, the blade easily breaks with sharp jerks of the hacksaw to the side. The material properties of the web are such that it holds the longitudinal tensile force very well, but is very fragile in bending.

For mini hacksaw

Mini hacksaws work with blades no more than 150 mm. Mainly designed for convenient and quick cutting of wood materials and metal products of small diameter, work with blanks, in a curve.

How to insert a blade into a hacksaw for metal

A hacksaw for metal is considered a fairly common hand tool that is designed to divide a workpiece into several separate pieces of a certain size. Its design features are characterized by the fact that it is possible to periodically replace the worker. When processing metal, there is a very high probability of rapid wear of the cutting edge. Therefore, the function of changing the tape was provided, which requires a small amount of time. There is just a huge number of different canvases, we will consider the features of the choice and many other points in more detail.

Tooth shape of blades for metal

Attention is also paid to the shape of the tooth. This indicator depends on:

Installation direction of the metal plate.
Wear during operation.
Tool performance.

In most cases, the classic form is used, since it is considered a universal option.

Recommendations for use

Only with correct use can the possibility of damage to the hacksaw blade for metal be excluded. The main recommendations are as follows:

It is necessary to carry out processing at the same speed and applied force. Even minor changes can cause a defect.
Take breaks from time to time. The reasons are that too high a temperature causes an increase in ductility.
At the time of the surface treatment, the entire hacksaw blade must pass. This ensures even wear.

You can often find a situation where, due to strong heating and applied force, the metal plate bursts. Low-quality versions wear out quickly and become practically unusable.

For mechanical

For a mechanical tool, files with any marking are selected depending on the surface to be treated. The length of the cutting double blade is from 300 mm and more. Mechanical equipment is used when processing a large number of workpieces with a length of 100 mm.

Operating tips

Before using the tool, it is worth installing the blade correctly in the equipment.

The installation method depends on the design of the tool’s fastening system. If the heads are equipped with slots, then the blade is inserted directly into them, stretched a little if necessary, fixed with a pin.

Installation of the cutting product into a lever-type hacksaw is carried out by extending the lever, putting on the blade, returning the tool frame to its original position.

Correctly stretched blade, when the fingers click on the surface of the file, emits a slight ringing and small vibrations. It is strictly forbidden to use pliers or a vice while tensioning the file. Slight skewing or bending will damage the saw blade or break it completely.

Installation of single sided blades requires utmost care due to the direction of the cutting elements. You need to attach the file so that the teeth are facing towards the handle of the equipment. Progressive movements when cutting products are performed from oneself. It is not recommended to set the saw blades with the teeth in the opposite direction from the handle, this will not allow the planned work to be carried out and will lead to the saw sticking in the material or blade breakage.

Principles for choosing canvas

It is important to correctly select the most suitable version of the product for a specific operating condition. If the surface does not have the required properties, then it will not last for a long period. The selection criteria include the following points:

The most important selection criterion is the distance between the two mounting holes. For some instruments, this indicator may change due to a special device.
The next selection criterion is the strength of the cut metal. If the work involves cutting common soft alloys, for example, copper or aluminum, then the product with the lowest surface layer hardness is selected. Steel Х6ВФ is very widespread; the HCS marking is used for canvases of imported origin. It is also possible to process durable metals, for which the HSS hacksaw blade is suitable, import marking HSS,
The thickness of the cut metal and the quality to be achieved after processing are also taken into account. Abroad, the defining criterion is the PPI indicator. the number of tooth peaks per inch of length. To ensure high quality, a PPI of more than 24 is required, if performance is a priority, then an option with an indicator of less than 24 is chosen.
When choosing, attention is paid to the quality of the cutting edge spreading. This parameter must comply with the standards that are set in the previously given GOST. There are three main execution options: dilution for each, through one tooth or two adjacent.

Many are looking for a hacksaw blade that can last for a long period. It should be borne in mind that the quality of the applied coating affects the service life. The use of inexpensive substances becomes the reason why a large number of cracks appear on the surface when heated.

The quality is also influenced by the uniformity of the wiring. A good metal hacksaw blade has a deviation of no more than 45% for a length of 10 mm. Also, visual inspection allows you to determine how equal in height the individual teeth are. Accurate results can be obtained by using a micrometer or other measuring instrument with high accuracy.

Operating tips

Before using the tool, it is worth correctly installing the blade into the equipment.

The installation method depends on the design of the tool’s fastening system. If the heads are equipped with slots, then the blade is inserted directly into them, stretched slightly if necessary, fixed with a pin.

Installation of the cutting product into a lever-type hacksaw is carried out by extending the lever, putting on the blade, returning the tool frame to its original position.

Correctly stretched blade, when the fingers click on the surface of the file, emits a slight ringing and small vibrations. It is strictly forbidden to use pliers or a vice while tensioning the file. Slight misalignment or bending will damage the saw blade or break it completely.

Installation of single sided blades requires utmost care due to the direction of the cutting elements. You need to attach the file so that the teeth are facing towards the handle of the equipment. Progressive movements when cutting products are performed from oneself. It is not recommended to place the saw blades with the teeth in the opposite direction from the handle, this will not allow the planned work to be performed and will lead to the saw sticking in the material or blade breakage.

How to install a blade on a hacksaw for metal?

The installation method is determined by the design of the fastening system on the hacksaw itself. In the case of a threaded clamp, the file is slid onto the corresponding lug, tightened slightly, and then secured with a wing nut. With sharp changes in the load on the hacksaw, such a mount will have to be checked periodically. For hacksaws with a lever-type device, the installation and replacement process is simplified: simply pull out the lever located on the side opposite to the handle of the hand-held hacksaw, put on the blade, and return the lever to its original position.

When properly tightened, the blade should emit a slight ringing and vibrate slightly. During operation, such a canvas should not change the direction of its movement under load.

For single sided blades, it is important to correctly position the direction of the teeth. Their slope should be directed away from the handle. Most of the workers make the main working movement away from themselves, when the metal is cut. The reverse movement is only intended to return the hacksaw to its original position. When trying to cut metal and during idling, the geometry of the teeth, not adapted to such loads, will tear the tooth off the base, and as a result, the blade may collapse. This phenomenon is especially true for diamond blades.

Recently, the so-called bimetallic blades (designation. BIM) have become popular, when a high-speed steel strip is welded onto the main strip of hardened structural steel of the 45 steel type. Here everything is decided by quality: for Chinese-made saws, the metal grade is most often not guaranteed (as, indeed, the quality of welding), therefore, when working with durable metal, there are often cases of delamination of bimetallic blades.

A hacksaw is used to create through cuts on dense materials made of metal, cut slots, trim contour products. The locksmith tool is made of a hacksaw blade and a base machine. One end of the frame is equipped with a static clamping head, a handle for holding the tool, and a shank. The opposite part consists of a movable head and a screw that tightens the cutting insert. The heads of the hacksaws for metal are equipped with slots in which the working blade is installed, which is fixed with pins.

Frames are made in two forms: sliding, allowing you to fix the working blade of any length, and solid.

Features:

Each type of material has its own cutting blade.

A hacksaw blade for metal is a narrow metal strip with fine teeth placed on it. The frames are made outwardly similar to the letters C, P. Outdated frame models were equipped with wooden or metal handles, placed parallel to the blade. Modern models are made with a pistol grip.

A hacksaw blade for working with wood is the most common joinery option. It is used for processing and cutting plywood, wood building materials of various densities. The design of hand saws is specially equipped with a beveled working surface, teeth are located on the side of the blade.

For working with concrete, the blade has larger teeth on the cutting edge. Equipped with carbide metal solders. Thanks to this, it becomes possible to saw concrete structures, foam blocks, sand concrete.

Blades with a pitch of about 1.6 mm are used for processing metal products, up to 20 teeth are located on a 25 mm file.

When processing metal products with a different hardness index, files with a certain number of teeth are used:

Angle and other steel. 22 teeth;
Cast iron. 22 teeth;
Hardened material. 19 teeth;
Soft metal. 16 teeth.

In order for the file not to get stuck in the workpiece, it is necessary to pre-set the teeth. Consider the principle of wiring.

The width of the cut is greater than the thickness of the working blade.
Hacksaw saws with a tooth pitch of about 1 mm must be wavy. Each pair of adjacent teeth must be bent in different directions by approximately 0.25-0.5 mm.

The plate with a pitch of more than 0.8 mm is spread using a corrugated method. The first few teeth retract to the left, the next teeth to the right.
With an average step of about 0.5 mm, the first tooth is retracted to the left, the second is left in place, the third to the right.
Coarse insert up to 1.6 mm. each tooth retracts in opposite directions. It is necessary that the wiring ends at a distance of no more than 3 cm from the end of the web.

For manual

Hand saws are, on average, equipped with single blades of type 1 with the marking HCS, HM. The length of the file depends on the length of the tool frame, the average is in the region of 250-300 mm.

How to choose?

When choosing a cutting product, they are guided by the type of tool.

Principles for choosing canvas

The selection criteria are:

A type of manual hacksaw for metal, more precisely, the distance between the mounting holes. It is better if it is variable, then a hacksaw blade of any standard size is suitable for work.
Tensile strength of the cut metal. If the tool is supposed to be used to separate soft, ductile metals. copper, aluminum, etc., then it is advisable to have a hacksaw blade with the lowest hardness. H6VF steel can be adopted as a material; imported canvases have the HCS designation on the lateral plane. High speed steel blades are suitable for cutting harder metals (corresponding import marking. HSS).
The thickness of the cut metal and the quality of the separation surface. Foreign practice recommends using the PPI parameter as a selection criterion. the number of tooth vertices per inch of blade length. So, for thin metals, where it is required to obtain a very smooth cut surface, the PPI value is considered correct24. If for the user the main factor of productivity than quality, then there should be PPI

The quality of the coating also affects the durability of the hacksaw blade. For domestic tools, the most common coating is Chem.Oks.Prm., Less often tools with nitroenamel coatings such as NTs-25 or NTs-132. It should be remembered that under prolonged loads, when the file heats up, the enamel may crack.

When choosing a high-quality hacksaw blade, you should pay attention to the uniformity of the tooth setting: in high-quality products, this parameter should not exceed 45% of the tooth pitch over a length of 10 mm. Product quality can also be assessed by the parameter of equal height of the teeth: the difference in adjacent vertices should not exceed 0.10. 0.15 mm, which is checked using a micrometer or a depth gauge.

For mini hacksaw

Mini hacksaws work with blades no more than 150 mm. Mainly designed for convenient and quick cutting of wood materials and metal products of small diameter, work with blanks, in a curve.

How to put a blade on a hacksaw for metal

The blade is inserted into the hacksaws for metal with the tooth forward (and, of course, down), so that the working movement at which the sawing is carried out was “forward”.

The holes in the canvas are either put on special projections on the frame of the hacksaw, or (as done in Soviet models. I like this method more, it has higher rigidity) inserted into the slot, in which it is fixed with cotter pins, they have long been lost in my hacksaw. I use trimmings nails.

After that, the blade is tightened with a screw. Personally, I usually twist the screw (“how much is spinning”. all the way. It never came out to tear the canvas, and with a weak tension it is not convenient to work. a file “walks”)

In order to remember once and for all how to correctly insert the blade into a hacksaw for metal, you need to understand the principle of the blade itself and its cutting method.

So the canvas scrapes metal with its teeth, each small tooth scrapes a little, a little metal, and since there are several dozen of them, with each wire of the canvas there is a tangible depression, which is called a cut.

So the blade for metal has the direction of the teeth in one direction, this is done in order to make it easier for the teeth to scrape the metal.

Due to such features, the blade is installed exclusively with its teeth away from oneself, since during cutting, the worker’s effort is applied when the hacksaw is directed away from himself, and when it returns, the force is removed.

That is, the principle of a file, so the teeth are set away from you, from the hacksaw handle.

Now, regarding the tension, the canvas should be stretched very tightly, but you need to tighten the adjusting lamb by hand, if you use a lever or key, but you can simply break the canvas, and of course you need to make sure that the canvas itself is perfectly level, without scrolls and bends, if suddenly The hacksaw is already experienced and the blade becomes uneven in it, you need to either eliminate this defect, or achieve the maximum even blade in the hacksaw. otherwise, you will just break out the teeth, and the blade will warm up and get stuck in the cut!

The blade for a hacksaw for metal is one of the most short-lived elements from the entire range of consumables for tools. Of course, a lot depends on the technology of working with metal and the skills of using a hacksaw, but first of all you need to be able to make the right choice of the blade. Today, we will talk about the choice and types, and also learn how to easily change the hacksaw blade.

For mechanical

For a mechanical tool, files with any marking are selected depending on the surface to be treated. The length of the cutting double blade is from 300 mm and more. Mechanical equipment is used when processing a large number of workpieces with a length of 100 mm.

How to properly and quickly saw with a hacksaw for metal?

To be honest, I don’t know any special secrets, but there are some nuances that should be observed.

About 30 years ago, when fortunes and angle grinders were not very much, whoever heard his father did all the work with metal with an ordinary hacksaw for metal. And a hand drill.

Firstly, I would advise choosing a hacksaw like in the second photo. This option is more convenient to work with. It’s just more comfortable to hold in your hands and the grip won’t slip in your hand.

When installing the blade, pay attention to the correct position of the teeth. As shown in the photo, they should go away from the cutter. When cutting, you need to apply force when the saw goes away from you. When returning the saw back, you need to slightly raise the handle and release the pressure on the saw itself. This way the teeth will stay in working order longer.

It is also worth paying attention to the tension of the blade when installing it in the saw. If the blade is too loose or too tight, then at the slightest hesitation of the saw it will simply break.

Well, so that the canvas does not get too hot, you can drop a couple of drops of oil into the area of the cut.

Well, do not forget that the metal that is cut can simply be broken. That is, sometimes it is enough to cut off half of, for example, a pipe or corner, and simply break the rest, by bending to one and the other side.

I would also like to draw your attention to the fact that the part that is supposed to be cut is desirable (if possible) to be securely fastened, for example, in a vice.

The author of the question chose this answer as the best

There are no secrets. You need to remember a few important points and the metal will scatter like butter on a knife.

You need to choose a saw with a comfortable handle and durable. We choose a canvas not from cheap ones, but with a durable composition sprayed on the teeth. Place the blade in the saw so that the teeth of the blade are facing away from you.

When performing a split, you need to actively apply force when moving the saw away from yourself and simply, without load, perform a movement from yourself. Try to cut with the blade position with the maximum contact area of the blade teeth with the surface of the object to be sawed or sawed. As for the split of the pipe, it is enough to cut the pipe to half and a little more, as it can break clearly under your little effort. Much depends on the thickness of the pipe and its age.

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As many colleagues have already noted, when performing work with a hacksaw for metal when cutting (sawing) it is necessary to pay attention to the following points:

Robust saw frame with a comfortable handle;
High-quality and appropriate step for a specific metal (depending on the viscosity and hardness of the metal) hacksaw blades;
Set the direction of the teeth away from you;
Hand movements should be smooth and with a wide amplitude.

As for the nuances, I can say that hacksaw blades are a material with high hardness and fragility and are afraid of overheating. Therefore, make constant stops at work and the saw will serve you for a long time.

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Your friend’s secret is not in the way of working with the instrument, but in the instrument itself. Handling a hacksaw for metal is taught at school (many made hammers, corners, etc.), therefore there are no special secrets: put the blade correctly and keep it straight when you saw. But in my practice there were special canvases for metal (I don’t remember exactly where: either from fur. Saws, or from some other machine, but not the essence.), Which lightly cut pipes in the apartment and other metal objects that are easier was to cut with a hacksaw than to spin an angle grinder for the sake of this business.

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I can offer several recommendations that will speed up cutting metal with a hacksaw:

Use a hacksaw with a sturdy frame made of composite materials.
For work, buying blades is better bimetallic, with hardened teeth.
For metals of different hardness, select a blade with the appropriate number of teeth:

For soft metals, the number of teeth should be kept to a minimum. 16-18pcs / inch.

For hard metals. Maximum (32 teeth by 25mm).

It is more rational to use new blades for cutting softer and more viscous metals (aluminum, brass, bronze, copper.), And used. For solid (steel, cast iron.)
If the blade breaks, it is imperative to clean the cut from any fragments of the blade that may have remained there and only after that continue working with a new blade.

By the way, if only one or a couple of teeth broke, the canvas can be saved from further destruction if you make an arc (notch) with rounded edges on emery (grind off) in this place.

A high pace of work does not always mean fast cutting of metal. There is a definite dependence of the number of back-and-forth movements on the hardness of the metal.

The harder the metal, the less intensity you need to work, otherwise the canvas will overheat and shrink quickly.

The position of the hacksaw, arms, body and legs is clearly demonstrated by this figure.

To learn how to quickly saw with a hacksaw for metal, you need to understand the following!

First. The hacksaw only cuts forward.

Second. In order for a hacksaw to cut metal, you need to apply even force when feeding the hacksaw forward and loosen it completely when pulling back.

Third. The movement of the hands should be as confident as possible, uniform, as flat as possible (without swinging to the sides, blockages in the sides and back and forth, without twisting and jerking).

Fourth. This is the need to lubricate the hacksaw blade with machine oil from both sides, before starting sawing, and with significant cuts and applying lubricant to the blade as it develops.

Fifth. It is necessary to periodically water the cut so that it does not overheat and does not overheat the hacksaw blade, which can cause the hardening to be released and the blade will simply be erased.

Sixth. Of course, the metal that you are going to cut matters, because not every metal can be easily cut with a hacksaw for metal, but there are some that cannot be cut at all, it is advisable to use a diamond cutting tool here.

So these are the nuances. I hope there is no need to dwell on the choice and installation of the canvas, and in the previous answers this is already more or less described.

Correctly install the sheet metal

Metal cutting is laborious, requires serious patience and requires good tools.

One of the most common tools is a hacksaw for metal. Basically, the type of hacksaws is about the same, the mechanism for changing the blade is different.

There are two widespread fastenings of the blade, this is a threaded clamp, while the blade is fixed and tightened with a special nut with a wing.

Another type of attachment is the linkage. In this case, the hacksaw blade for metal is removed and installed with the participation of a small lever.

In the latter case, according to the assurances of the manufacturers, the removal and installation of the web is faster. But the cost of such a hacksaw is much more expensive.

It’s hard to imagine a person who would work without stopping with a hacksaw all day, and the speed of changing the blade would be very important for him.

Therefore, the choice of a hacksaw attachment mechanism for metal depends solely on your desire, no more. Well, from the completeness of the wallet too.

There are plenty of hacksaw blades to this day. The choice primarily occurs between domestic and foreign manufacturers.

Domestic canvases do not differ in quality, they quickly become blunt, teeth fall out. But their cost is five, and sometimes fifteen times lower than foreign ones.

The canvases for metal are also distinguished as hardened and bimetallic. The latter are more flexible, less likely to break, but also more expensive than hardened ones.

Hacksaw blades differ in the number of teeth, they come with 18, 24 and 32 teeth.

How To Install A Blade On A Hacksaw For Metal

To cut harder material, you need to take a blade with a large number of teeth, and vice versa.

If you take a metal blade with a small number of teeth for cutting hard material, it will be much more difficult to cut.

It is necessary to install the blade in a hacksaw for metal correctly, the teeth should be directed in the opposite direction from the working.

Only in this case, less effort will be spent on working with a hacksaw and cutting on metal will go easier and faster.

How to cut?

The range of motion is maximum, from the edge of the blade to the edge, without hitting the part with the arc of the hacksaw. There is no need to mark time. this way you will quickly erase the canvas in one area and have to throw it away, because it is impossible to use the damaged canvas. Keep the arc of the hacksaw straight, do not let it bow in different directions. The direction of cutting corresponds to the plane of the hacksaw arc, so bumping is contraindicated here. In addition, the blade easily breaks with sharp jerks of the hacksaw to the side. The material properties of the web are such that it holds the longitudinal tensile force very well, but is very fragile in bending.

Hacksaw blades

Hacksaw for metal. This is a hand tool that is used to cut profile metal and pipes. The simplest hacksaw for metal consists of a machine and a hacksaw blade. The machine, in turn, consists of a frame, into which on one side a handle is inserted with a device for fixing the web, and on the other hand, a device for fixing and adjusting the tension of the web. The tensioning device, on the one hand, has a groove for inserting and fixing the web, and on the other hand, a screw with a ram with which the web is tensioned.

Hacksaw blades for metal differ from each other in width, length, thickness, distance between teeth and their height. The use of a particular blade depends on the thickness, hardness and shape of the material to be cut. The fabric makers have made sure that you can choose the right fabric for the material you need to cut, be it aluminum, copper, bronze or even plastic. The blade dimensions, namely length, width, tooth dimensions and steel grade, can be found on the purchased hacksaw blade.

How to install a blade in a hacksaw for metal?

As shown in the first picture of the article: teeth down (if the blade is one-sided) and the teeth are directed forward, away from the handle. When you are sawing, you are applying downward and forward pressure. in the same way the teeth of the hacksaw should be directed, downward and forward. To install, loosen the tension screw, remove the old blade from the pins, put on a new one and tighten so that the blade sounds like a string from the click of your fingernail. The main thing here is not to overdo it and not to tear the canvas. Experienced you will find the optimal tension.

The tension is made with the help of the ram on the adjusting device, that is, by twisting the ram you will stretch the canvas. So when pulling the hacksaw blade, you need to find a middle ground. Also, make sure that the blade is installed evenly, without distortions, since the distortion will lead to an uneven cut during cutting.

How to install correctly. Cutting the line with a hacksaw

A hacksaw for metal is also valuable in that it allows you to cut along almost any curve of the mowing line. To cut in an arc without interrupting the forward motion of the hacksaw, align it perpendicular to the end of the part material (i.e. 90 degree tilt angle) and gradually smoothly rotate the hacksaw arc so that the blade follows the intended mowing line. Yes, the line of the cut is always necessary to mark with anything. With a pencil, marker, scratch with a nail. The main thing is to be seen when you work. The rotation of the canvas must be done as gently and smoothly as possible, otherwise it will break; turns. This is extreme for a hacksaw blade for metal.

If you need to make a sharp turn, say 90 degrees, you have to practically mark time. Continuing to saw and smoothly turn the arc of the hacksaw, periodically stepping back so as not to go far from the turn, while using the side of the material that is external for the part to turn the blade.

To cut the inner corner, you first need to drill a straight line with a thin drill slightly longer than the width of the blade, thread the blade into this groove and cut further with a hacksaw. In general, practice will show how this is done. Nothing complicated here.

The picture below shows another way to use a hacksaw for metal. For this method, you need to reinstall the canvas by rotating it 90 degrees.

Hacksaw blades for metal

Sources:

http://schemy.ru/info/kak-stavit-polotno-na-nozhovku-po-metallu/
http://www.Kak-sdelatpravilno.ru/kak-pravilno-ustanavlivat/pravilno-ustanavlivat-polotno-metallu.html

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