How To Put A Blade On A Hacksaw For Metal

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How To Put A Blade On A Hacksaw For Metal

According to the material for making hacksaw blades, there are the following types:

  • Carbon steel blades (economical and flexible)
  • Partially heat-treated fabrics
  • Fully hardened blades (used for precise, directional cuts)
  • High-strength, semi-flexible steel blades with high kobold content and hardened tooth
  • Bimetallic blades (have great flexibility and wear resistance)

Each type of hacksaw blade for metal has its own characteristic features. thickness, width, tooth pitch, number of teeth per inch.

By setting the teeth of the blade for metal there are two types:

  • With wiring along the canvas (on the working side it has a wavy shape). This setting is used with a very small tooth pitch (less than 1 mm).
  • With streaks on the teeth. In this type of wiring, there may be options. for each prong, across a prong, two adjacent prongs across a prong.

Types of metal blades for hacksaws

Blades for metal for a hacksaw are distinguished by size, by material of manufacture, by the type of tooth setting. There are also one-sided and double-sided canvases.

The size of the blade can be from 150 mm (mini-hacksaw) to 300 mm (standard hacksaw). The blade for metal has fine teeth, since it is almost impossible to saw metal products with large teeth.

In blades for cutting metal, there are such main areas as: edge (ends of the blade), back (upper part), cutting part (part of the blade on which the teeth are located).

The teeth must be hardened, because it must be harder than the metal it is intended for cutting. Therefore, quenching or carburizing is carried out on the working part of the blade, followed by quenching (this or that process depends on the brand of metal used for production).

Which tooth to choose

The spaces between the teeth are called shaving. It is in them that metal chips remain until the teeth leave the cut. The larger the gaps, the less resistance to the blade during long cuts.

Often, the setting of the teeth ends at some distance from the ends of the blade.

Blades for metal are made with different tooth pitch, while the tooth size plays an important role when cutting the material. The number of teeth per linear inch of blade (25 mm) is taken as a standard. This can be 18, 24 or 32 teeth per linear inch of blade.

The larger the number of teeth, the smaller the tooth, and accordingly the blade will cut the harder material (metal). But do not use blades with a very fine tooth for working with soft metal, because the working part of the blade will quickly become clogged with chips (this will greatly slow down and complicate the work).

For long-term work, hardened or bimetallic blades are better suited. The hardened blades look like nickel-plated steel with dark (hardened teeth), they are used when cutting hard metals. Black-colored canvases are often of poor quality and will not last long.

Installing the blade on a hacksaw

Do not forget that when installing the blade, it is imperative to place it with teeth from the handle and pull it on a hacksaw until it does not bend. With the correct tension, if you click with your fingernail on the canvas, a slight ringing is heard.

During the beginning of the sawing process, it is necessary to use a small working part of the blade, and only when we go a little deeper into the workpiece can we work the entire length. When working, do not press hard on the hacksaw, this is unlikely to increase the cutting speed, but the blade can be broken.

Hacksaw blade for metal. How to choose and how to deliver?

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.

Types of hacksaw blades

  • Single, with a distance between the fixing holes 250 ± 2 mm, with a total blade length not exceeding 265 mm;
  • Single, with a distance between the fixing holes of 300 ± 2 mm, with a total blade length not exceeding 315 mm;
  • Double, with a distance between the fixing holes of 300 ± 2 mm, with a total blade length not exceeding 315 mm.

In this case, the thickness of the leaf s single version is 0.63 mm, double. 0.80 mm. Height with a single row of tines is 12.5 mm, and with a double row is 20 mm.

GOST also regulates the values ​​of the pitch of the teeth P, mm and their number z, which for the first type of blades are 0.80 / 32, 1.00 / 24 and 1.25 / 20, respectively. Owners of longer hacksaws, in addition to those listed above, can also use hacksaw blades with parameters 1.40 / 18 and 1.60 / 16.

According to the brand of material used for the manufacture of hacksaw blades for metal, they are made from tool steels:

  • H6VF brands.
  • В2Ф brands.
  • High-speed, grades P6M5, P12 or P18.

The assortment of domestic hacksaw blades is exhausted by this, however, so-called diamond blades with surface spraying with titanium nitrides or other refractory metals are widespread in specialized retail chains. Such canvases can be easily distinguished by their color: ordinary steel canvases are dark gray, and dust-coated can have different colors. from bright orange to blue (depending on the manufacturer).

There are also canvases with the so-called tungsten carbide spraying, however, with a very high hardness, they are extremely sensitive to bending stresses. Therefore, when cutting metal, their durability is negligible.

The high strength of hacksaw blades for metal is ensured by appropriate heat treatment. On the surface of the blade, two zones are distinguished with different values ​​of hardness: directly at the teeth, it ranges from HRC 64. 67 for alloyed tool steels to HRC 73. 78. for high-speed steels (for diamond blades this parameter reaches HRA 82. 84), and in the rest zone. НRС 44. 46. A significant difference in hardness confirms the high sensitivity of the product to bending stresses, therefore, the standard also limits the maximum force applied to the hand hacksaw. It should not exceed 60 kg when working with blades with a tooth pitch of less than 1.4 mm, and 10 kg for blades with a tooth pitch of more than 1.4 mm.

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

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.

The blade is inserted into the hacksaws for metal with the tooth forward (and, of course, downward), so that the working movement during which the sawing is carried out is “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 it turns”. all the way. It never came out to break the blade, and with a weak tension it is not convenient to work. the file “walks”)

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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!

A hacksaw for metal 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.

Hacksaw for metal how to put the blade correctly

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.

Types of hacksaw blades

There are three main sizes available:

  • Single, with a distance between the fixing holes 250 ± 2 mm, with a total blade length not exceeding 265 mm;
  • Single, with a distance between the fixing holes of 300 ± 2 mm, with a total blade length not exceeding 315 mm;
  • Double, with a distance between the fixing holes of 300 ± 2 mm, with a total blade length not exceeding 315 mm.

In this case, the thickness of the leaf s single version is 0.63 mm, double. 0.80 mm. Height with a single row of tines is 12.5 mm, and with a double row is 20 mm.

GOST also regulates the values ​​of the pitch of the teeth P, mm and their number z, which for the first type of blades are 0.80 / 32, 1.00 / 24 and 1.25 / 20, respectively. Owners of longer hacksaws, in addition to those listed above, can also use hacksaw blades with parameters 1.40 / 18 and 1.60 / 16.

According to the brand of material used for the manufacture of hacksaw blades for metal, they are made from tool steels:

  • H6VF brands.
  • В2Ф brands.
  • High-speed, grades P6M5, P12 or P18.

The assortment of domestic hacksaw blades is exhausted by this, however, so-called diamond blades with surface spraying with titanium nitrides or other refractory metals are widespread in specialized retail chains. Such canvases can be easily distinguished by their color: ordinary steel canvases are dark gray, and dust-coated can have different colors. from bright orange to blue (depending on the manufacturer).

There are also canvases with the so-called tungsten carbide spraying, however, with a very high hardness, they are extremely sensitive to bending stresses. Therefore, when cutting metal, their durability is negligible.

The high strength of hacksaw blades for metal is ensured by appropriate heat treatment. On the surface of the blade, two zones are distinguished with different values ​​of hardness: directly at the teeth, it ranges from HRC 64. 67 for alloyed tool steels to HRC 73. 78. for high-speed steels (for diamond blades this parameter reaches HRA 82. 84), and in the rest zone. НRС 44. 46. A significant difference in hardness confirms the high sensitivity of the product to bending stresses, therefore, the standard also limits the maximum force applied to the hand hacksaw. It should not exceed 60 kg when working with blades with a tooth pitch of less than 1.4 mm, and 10 kg for blades with a tooth pitch of more than 1.4 mm.

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.

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
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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.

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, it is always necessary to mark the line of a cut with anything. with a pencil, a 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 are extreme for a hacksaw blade for metal.

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

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

What are hand saws for metal?

Hand saws for metal are intended for cutting metal materials. This is not the only purpose of the tool, since it has proven itself well in relation to materials such as plastic, chipboard, foam plastic, expanded polystyrene, plexiglass, ceramics, laminate.

The file in question for sawing metal is a very necessary tool in the household, because in the absence of an angle grinder, it can always help in this situation. saw off the head of an oxidized bolt or saw through a steel wire. The big disadvantage of such a tool is the high expenditure of physical strength and time. The presence of small teeth affects the time to achieve the result. To obtain a result, the master requires the application of not only titanic strength, but also patience. The result of long and hard work with the tool is the most accurate result, which sometimes surpasses the cut of an angle grinder.

Types of hand saws for metal

There are the following types of hacksaws for metal:

  • Homemade. The simplest options that are available in the kit for each master. Such devices are considered an outdated option, but their production continues to this day. The advantage of these tools is their simplicity of design. The handle is made of wood, and is located in the same plane with the canvas
  • Professional are intended for use during long-term work. Such products are equipped with a more comfortable handle, which, in addition, is rubberized. Some expensive models are equipped with a mechanism for adjusting the angle of the cutting part during operation.
  • Mini hacksaws or metal saws have a special shape that differs from the first two types. Such products are intended for use only when there are difficulties with access to the cut part. The device has the shape of a knife with an additional blade fixation point. The handle is made of plastic and metal with rubber

Design parameters of hand saws for metal

The hand saw looks quite simple for metal:

  • The base or frame “U”.shaped, mostly made of metal
  • Handle in various shapes for handcraft
  • Blade for metal for a manual hacksaw or a cutting element fixed at the edges of the frame

These are the main elements that make up hacksaws for metal. An important detail is the blade, which has a characteristic serrated appearance. Fine teeth designed specifically for handling hard materials.

The canvas is fixed on the frame. Alloy steel is used to make the frame. Frames come in different types, shapes and designs. Professional hand-held devices have the function of adjusting the angle of inclination of the blades. There are frame options that can be moved apart. This function in the tool allows the installation of cutting elements of different lengths.

The handle is also an important component, as it is able to provide the convenience and comfort of the tool. Handles come in different shapes, and are also made from such materials. wood, metal, plastic. The simplest handle is made of wood, and two-component devices are considered the most comfortable: metal and rubber insert.

The blade for a hand hacksaw for metal is a thin strip that is made of hard types of steel and has different lengths. There are wedge-shaped teeth on one or both sides. The hacksaw blade is the most fragile element of the tool, therefore, when working, it is important to control the rigidity of its fastening. Cutting elements for hand files are made according to the method of heat treatment of teeth, which allows to extend the service life of the product.

When choosing a canvas, attention is paid to its length. The length of the blade can be from 10 cm to 70 cm. The classic mechanical hand saw for metal allows the use of blades 30 cm long, since it is these dimensions of the tool that are the most comfortable and convenient for work.

How to properly saw with a hand hacksaw for metal

A hand saw for metal requires the master to comply with the following operating rules:

  • Taking the correct stance to the master. Feet should be well resting on the floor, and the work with the device is performed exclusively with two hands, so initially take care that the workpiece is securely fixed in the jaws of the vice
  • Reliable fixation of the web. Hacksaw blades are very fragile, so if the product “fidgets” from side to side with poor fastening, then at one point it will simply break
  • Correct saw movements. To cut a part, you need to not only hold the tool correctly, but also work with it. The tool is pressed against the workpiece when moving forward, and when it is returned to the opposite position, the pressure is released. If you do not reduce the clamping pressure during the return movement of the tool, the blade teeth will quickly become dull

Hacksaw for metal manual its purpose types and how to choose

The demand for hand hacksaws for metal remains relevant, since this type of tool has many advantages and only one drawback. This is the first tool that was invented by man for cutting metal blanks. Today, in the arsenal of every self-honoring master there is at least one variant among the different types of this instrument. The hand hacksaw for metal is popular because the tool is always ready to work in the absence of an angle grinder and electricity.

Choosing a tool or what to look for

To choose the best hand saw for metal, pay attention to the following parameters:

  • Length of tools and blades. The canvases have different lengths, but if a device is chosen, then you need to take one that is convenient to work with. If the tool is selected for a specific purpose, then remember that the length of the hacksaw should be 2 times the length of the part being cut
  • Lever. To choose the best device, you need to take several models and hold them in your hand. The difference is immediately apparent as some of the handles are awkward. It is better not to take tools with hollow handles, as they are not reliable. The handle should be comfortable and fit well
  • Canvas. The main characteristics of the blades are: tooth shape and pitch. Depending on which part will be sawn, the corresponding blades with the dimensions of the teeth are selected. Since few people pay attention to this at home, it is better to take several different products
  • Cost. The price depends on the quality and functionality
  • Manufacturer. If you are strict about the selection of tools, then pay attention to the models of well-known manufacturers. A popular brand specializing in the manufacture of hand tools is IRWIN

Such a reliable tool as a hacksaw for metal is necessary in the household, so it is worth considering its choice responsibly and competently. After using the blade, you should not throw it away, as it may be suitable for making additional tools: knives, cutters, compasses and even chisels (provided that the teeth are not worn out or dull). It all depends on the imagination of the master, so it’s never too late to start implementing ideas, and do not forget to share your inventions with others. The tells about the correct operation of hand saws for metal, which will also be useful and interesting to learn.

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.
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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.

Tooth pitch

The pitch of the teeth may also differ. This indicator of the hacksaw blade determines:

  • Performance.
  • Possible cut quality.
  • Application area.

Fine pitch allows you to get a high-quality cut when working with various alloys.

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.

Selection rules

Subject to certain rules, it is possible to choose a suitable canvas that can last for a long period. The main recommendations are the following:

  • The surface should be free of cracks or other defects, as well as traces of corrosion. This is due to the fact that even minor damage will cause increased wear.
  • At the time of selection, you should make sure that the saw is elastic. To do this, bend it a little, then release it. A high-quality product regains its shape almost immediately, which indicates high flexibility.
  • As previously noted, the allowable cutting speed is largely dependent on the number of teeth per inch.
  • The determining factor in many cases is the type of material used. Often, preference is given to hardened steel or bimmetal products. Tungsten carbide-coated version is short-lived.

As practice shows, a low-quality version has to be changed several times, how a more expensive offer will last for a longer period.

Saw blade 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.

Number of teeth

The determining factor is how many teeth there are per inch. The following depends on it:

  • Performance depends on the indicator. With an increase in the number of cutting edges, the task is significantly more complicated, the chips become finer.
  • A large number allows you to get a high-quality cut. This is achieved by reducing the resulting chips.

In addition, the increase in quantity becomes the reason for the increase in the cost of the product.

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.

Types of hacksaw blades and their design

Do not forget that the production of a working hacksaw blade is carried out in accordance with the established standards in GOST 53411-2009. The specified information in this regulatory and technical documentation defines the allocation of two main groups: for machine and manual cutting. It should be borne in mind that a hacksaw blade for metal is purchased extremely rarely, since such equipment is rarely used. For a hand hacksaw, the following versions are produced:

  • Single hacksaw blade for metal with a distance between the fasteners 250 mm. The overall length is 265 mm. This version is suitable for a tool that is used when there is no need for high performance.
  • Single versions with 300 mm distance between two fasteners. The total length is 315 mm.
  • For greater productivity, a double hacksaw blade is installed. The length of this version, like the previous one.

The value and pitch of the location is regulated, since such an indicator determines many operational characteristics.

In the manufacture of such a product, a variety of alloys can be used, on which the main operational characteristics largely depend. The most widespread are the following alloys:

  • X6VF.
  • В2Ф.
  • High speed alloys, for example, P5M5 and P12.

A hacksaw blade with tungsten carbide spraying is quite common in recent years, as it is characterized by increased wear resistance. It should be borne in mind that spraying can have a wide variety of colors, there are blue versions on sale, ordinary steel is dark gray.

The considered tungsten hacksaw blade is characterized by the fact that, with a high hardness of the working surface, the structure is characterized by high sensitivity to bending load. That is why, if carelessly cutting metal, such a product will not be able to serve for a long time.

Manufacturers can achieve a high strength index through heat treatment. In this case, it is worth considering the following:

  • The main part of the product is characterized by a hardness of the surface layer of about 44-46 HRC.
  • Depending on the type of material used in manufacturing, the hardness of the tooth varies in the HRC range from 64 to 67. This indicator is characteristic of alloyed alloys. High speed steel is characterized by having a hardness of HRC in the range of 73-78 units.

Do not forget that significant differences in hardness cause the product to be sensitive to bending. The tool is designed for various loads, it should not exceed 60 kg with a pitch of 1.4 mm, as well as 10 kg with a pitch of less than 1.4 mm.

A fairly large number of varieties of such a product determines that there are no serious problems with the selection of a suitable version.

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.