How to sharpen a disc from a circular

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How can you sharpen a circular saw

  • Special wheels for sharpening saws, made on the basis of diamond abrasives.
  • A regular file for sharpening a saw, but you also need to have a vise to secure the saw and a block of wood to use as a guide.
  • Processing on professional equipment is the fastest and highest quality way of sharpening, but it requires large material costs for purchasing a tool.

Types of circular saw teeth setting

The complexity of the wiring process is due to the need to move the teeth to the side at the same distance. This can be achieved by using a factory set circulating saw setter. Each tooth should be started from the middle of its size. For wood materials of different density, the degree of setting the teeth should be different, but without going into details, we can say that they are bred wider for sawing soft species than for hard ones.

There are three main wiring methods:

  • Stripping type wiring. This method boils down to the fact that the tooth after two remains in its place without change, the rest are rejected in different directions. This saw preparation is good for working with solid wood.
  • A variant of the classic setting, when the saw teeth alternately move to the right and then to the left. This versatile method can be used for almost all types of saws.
  • The so-called wavy layout, a distinctive feature of which is the retraction of the teeth not at a strictly defined distance from the center, but at different distances with a deviation of 0.3-0.7 millimeters.

When to sharpen a circular saw

There are very definite signs by which one can judge the state of the instrument. Sharpening saws is necessary when the following is clearly manifested:

  • During operation, smoke appears, a specific smell of burnt wood, the casing covering the saw teeth begins to heat up quickly.
  • When moving the tool along the workpiece, significant efforts must be made to push the saw forward.
  • After cutting the material and visual inspection of the sawn edge, black carbon deposits or a lot of chips, fiber scoring, chipped areas are visible.
  • A close examination of the saw teeth with a magnifying glass shows that the cutting parts are not sharp, but rounded edges.
sharpen, disc, circular

All this requires an immediate cessation of work, otherwise there is a great risk of damage to the material and wear of the circular saw to such a state when sharpening will no longer help it.

The main sharpening angles of circular saws

The front face, the one that first cuts into the workpiece in the direction of the saw movement, forms the main cutting edge with the rear face. The angle at which the leading edge meets the material is called the Y-angle (angle of attack). The angle between the back face and the front face is the taper angle. If you subtract the rake angle and the taper angle from 90 degrees, you get the clearance angle.

In practice, it is important to observe these angles when sharpening for each type of disc. It is according to the front angle that the saws are divided into types:

  • Longitudinally cutting, where the rake angle must not go beyond 15-25 degrees.
  • Transverse cutting, where it is permissible to sharpen the front face of the tooth at an angle of 5-10 degrees.
  • Universal discs, which are easy enough to cope with both longitudinal and transverse cuts, their rake angle should be maintained in the region of 15 degrees.

The angle of the bevel of the rear and front planes is also important: the sharper it is, the easier it is for the saw to enter the material, but wear occurs faster.

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Follow the rules! When cutting hard wood, the saws must be sharpened so that the taper and bevel angles are as small as possible (within acceptable limits). This extends the life of the blade until the next sharpening.

How to properly sharpen a circular saw blade

Saw blades must be sharpened regularly to avoid damage to the building material. We will tell you how to properly sharpen a saw blade with and without solders, what equipment and tools to use.

The disc tool for sawing wood is always useful in construction. The circular saw is convenient in that it allows you to quickly cut the material with minimal effort and time. As for the quality of the cut, we can say that it is perfect, but only when the saw is in good working order and well sharpened. Otherwise, it is even dangerous to work with such a tool, so you should sharpen the circular saw.

Determining the need for a sharpening operation is not difficult: a blunt tool cuts the workpiece poorly, which immediately catches the eye. There are two options here: either send the disc to the workshop, which is not always beneficial in terms of time and money, or sharpen the circular saw with your own hands. This may seem daunting at first glance. But if you delve into the essence of the saw device in more detail, it will not be difficult to perform maintenance of the tool at home.

Manual way

It is possible to independently sharpen the teeth by hand using a file, so that it is of high quality, if they do not have a bevel, that is, the surface of the front face is perpendicular to the surface of the blade. The process looks like this:

  • A block is harvested from dense wood with a section of somewhere 50×50 mm and a length of 100 mm. The sides of the bar should be located strictly perpendicular to each other.
  • Mark with a marker any tooth that will be reportable and the first to be processed.
  • The saw blade is clamped in a vice together with a bar so that the front edge of the workpiece is flush and in the same plane with the surface of the bar (in this case, the bar acts as a guide for the file).
  • A thin file (its thickness should allow it to fit freely into the cavity between adjacent teeth) is applied to the surface of the tooth to be treated and at the same time to the bar and methodical movements back and forth, sharpening is carried out.
  • This is how each tooth is gradually sharpened, monitoring the condition of the bar and, when working out its surface, slightly shifting the plane.

Sharpening saws do it yourself at home

Attention! To sharpen circular saws with your own hands, it is desirable to have certain skills in sharpening the tool. If there are none, at least practice on emery, sharpening an ordinary knife.

When working with a disc, the main thing is not to spoil the cutting surface, and this can easily happen if the hand trembles, the feed angle is violated. In order to avoid negative consequences, you should study the sharpening methods, and then everything will turn out right. Distinguish between a manual method of restoring cutting elements of a circular saw and a method using sharpening equipment.

General rules for sharpening a circular saw

  • The main edges are processed first of all, of which the front wears out more.
  • In extreme cases, with severe wear of the side faces, they are corrected.
  • At a time, remove no more than 0.15 millimeters of the saw metal thickness.
  • When finishing the edges with an electric tool, overheating of the metal is not allowed, in which case its properties deteriorate.
  • To ensure the maximum service life of the saw, when it can be sharpened up to 30 times, both edges should be sharpened: both the front and the back. removing the same amount of metal.
  • It is not allowed to sharpen circular saws with tools that are not intended for this, for example, an angle grinder and a disc for cutting metal.

After carrying out the basic sharpening operations, you can finalize the teeth with fine sandpaper. The quality control of the sharpening of the tool takes place in working conditions. If everything is in order, the cutting of the material will be clean, smooth, without visible defects and blackening.

How to sharpen a saw blade correctly?

Sharpening your circular saw is one of the main safety measures for this tool. Indeed, not only the quality of the work performed, but also the likelihood of injury during work depends on this procedure. Therefore, sharpening the tool should be carried out regularly to avoid wood scrap and the risk of injury.

The company “Mnogofrez” recommends sharpening the saw blade on wood as it wears out. This will protect not only the workpiece from damage, but also the tool itself.

When sharpening is needed?

Professionals recommend regularly sharpening the tool. But how do you know when the sharpening time has come? To do this, you need to pay attention to the following signs:

Homemade High Precision Sharpener

the appearance of smoke and a specific burning smell;

the need to apply effort when working with the tool;

a large number of flaws on the workpiece after cutting;

rounding of the disc edge when viewed under a magnifying glass.

When one or more of these signs appear, you need to hand over the tool to a sharpener or sharpen it yourself.

Basic sharpening rules

The main condition for the long-term operation of one disc is timely sharpening. At the same time, experts advise adhering to the following recommendations:

Avoid the radius of curvature of the cutter by more than 0.2 mm.

First of all, sharpening is carried out on the main edges, the main part of the wear of which lies on the front part.

The side edges are also machined during heavy wear.

Metal layers are removed gradually, no more than 0.15 mm in one pass.

When used for sharpening an electric tool, overheating of the disc is not allowed.

To ensure the maximum service life of the disc with sharpening up to 30 times, experts recommend that when sharpening, remove the same material thickness from the inside and outside of the disc.

You can properly sharpen the saw blade with your own hands only with the help of special tools.

For better results, you can use sandpaper. The check is usually carried out in the course of work. The good quality of sharpening is evidenced by a smooth cut without visible defects.

Sharpening methods

Sharpeners know how to sharpen a circular saw blade correctly. The services of a specialist will provide a good result, but you will have to pay money for them. With special tools at your disposal, the procedure can be carried out independently. To do this, you will need the following tools:

wheels for sharpening saws with diamond abrasive;

file for sharpening and a vice for fixing the disc;

a professional machine is expensive, but the result is the highest quality.

The company “Mnogofrez” presents a wide range of milling tools. If you do not know how to sharpen a circular saw, our consultants will provide you with all the information you need to sharpen yourself.

How to sharpen a circular saw correctly

The circular saw blade consists of a steel blade (blade body) and carbide-tipped inserts in the form of cutters, the shape of which can be different. To sharpen a disc correctly, you need to know the geometry of the tooth and the basic rules of sharpening.

To sharpen the disc correctly, you need to know the geometry of the tooth, as well as the basic rules of sharpening.

Sharpening circular saws

What you need to sharpen circular saw blades

First of all, you need to prepare the appropriate accessories that will allow you to properly sharpen the saw blade on wood. It is important to consider the availability of the following tools:

  • file;
  • assembly vices;
  • wooden block;
  • colored marker.

Sharpening saws do it yourself at home

Attention! To sharpen circular saws with your own hands, it is desirable to have certain skills in sharpening the tool. If there are none, at least practice on emery, sharpening an ordinary knife.

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When working with a disc, the main thing is not to spoil the cutting surface, and this can easily happen if the hand trembles, the feed angle is violated. In order to avoid negative consequences, you should study the sharpening methods, and then everything will turn out right. Distinguish between a manual method of restoring cutting elements of a circular saw and a method using sharpening equipment.

Material and properties of carbide teeth

In domestic saws, sintered tungsten-cobalt alloys of grades VK (VK6, VK15, etc.) are used as the material for cutting inserts. BK6 has a hardness of 88.5 HRA, BK15 has 86 HRA. Foreign manufacturers use their own alloys. Hard alloys VK consist mainly of cobalt cemented tungsten carbide. The characteristics of the alloy depend not only on its chemical composition, but also on the grain size of the carbide phase. The smaller the grain, the higher the hardness and strength of the alloy.

sharpen, disc, circular

Attach the carbide plates to the disc by high-temperature brazing. As a material for soldering, at best, silver solders are used (PSr-40, PSr-45), in the worst case, copper-zinc solders (L-63, MNMTs-68-4-2).

Basic principles of sharpening

When sawing massive workpieces, the side edges are also subject to rapid wear.

The saw should not be excessively blunt. The radius of rounding of the cutting edge should not exceed 0.1-0.2 mm. In addition to the fact that when working with a very blunt saw, productivity drops sharply, sharpening it takes several times longer than sharpening a saw with a normal bluntness. The degree of bluntness can be determined both by the teeth themselves and by the type of cut they leave.

Correct sharpening of circular saws consists in ensuring the maximum number of sharpenings, which in the optimal case can reach 25-30 times, while ensuring the proper sharpness of the cutting edge. For this purpose, it is recommended to sharpen the carbide tooth on the front and back planes. In fact, the teeth can be sharpened along one front plane, but the number of possible sharpenings is almost two times less than when sharpening along two planes. The figure below illustrates why this is happening.

The last pass when sharpening saw blades is recommended to be done along the back plane of the tooth. Standard metal removal rate. 0.05-0.15 mm.

Before sharpening, the saw must be free of dirt, such as resin, and the values ​​of the sharpening angles must be checked. On some saws they are written on the disc.

Tools

It is allowed to sharpen the saw with your own hands only when using special devices. For this, there is a grinding machine that helps to carry out the process on an automatic machine, and not manually. Then the result becomes more accurate.

In addition, other improvised devices are used for sharpening:

  • Mounting vise;
  • File;
  • Piece of wood.

You will not be able to replace the listed devices. If at least one of them is not available, then sharpening will not work.

Manual way

It is possible to independently sharpen the teeth by hand using a file, so that it is of high quality, if they do not have a bevel, that is, the surface of the front face is perpendicular to the surface of the blade. The process looks like this:

  • A block is harvested from dense wood with a section of somewhere 50×50 mm and a length of 100 mm. The sides of the bar should be located strictly perpendicular to each other.
  • Mark with a marker any tooth that will be reportable and the first to be processed.
  • The saw blade is clamped in a vice together with a bar so that the front edge of the workpiece is flush and in the same plane with the surface of the bar (in this case, the bar acts as a guide for the file).
  • A thin file (its thickness should allow it to fit freely into the cavity between adjacent teeth) is applied to the surface of the tooth to be treated and at the same time to the bar and methodical movements back and forth, sharpening is carried out.
  • This is how each tooth is gradually sharpened, monitoring the condition of the bar and, when working out its surface, slightly shifting the plane.

Wood saw sharpening

A saw for wood is the most important tool in the hands of a specialist, which must work properly and reliably, especially if the saw is properly sharpened. However, when buying this product, the consumer is not always happy with its pungency. Wood saws are often sold blunt. To a greater extent, this applies to large-toothed tools. Therefore, the issue of sharpening remains relevant for those who wish to achieve efficient saw operation.

It is known that there are different forms of sharpening for each type of work.

  • The saw must be parted first if it is not sufficiently parted. It is best to do this using a specialized layout. But if such a part is not at your disposal, then you can use pliers.
  • The saw is clamped with the teeth up, the operator must perform actions so that he can see the whole process along the blade.
  • Then you need to bend every second tooth in different directions, accompanying each movement by tilting the pliers at an equal angle.
  • Often wiring is already present to a small extent initially. The owner of the saw simply needs to increase it when it comes to raw wood or large saws. If the saw is small and is designed to perform work that requires great accuracy, then the factory wiring is sufficient.

In the process of sharpening a saw on wood, you will need a file that has three edges.

A triangular file is used to sharpen the teeth. This process is carried out from the inner surface in relation to the setting of the saw teeth. The file is positioned at an angle in the cutting edge. This angle should be sixty to forty-five degrees.

In practice, it is much more efficient to first sharpen one side of the teeth, and then, turning the saw over, sharpen them on the other side. Thus, a person makes the same type of movement, which allows you to sharpen the saw faster and more efficiently.

When sharpening saws, it is necessary to follow the most important rules that not only allow you to achieve a higher effect, but also ensure safety. To do this, when sharpening saws, you must:

  • eliminate any background noise or communication with other people,
  • you should turn off the radio, TV, thus achieving complete silence, creating a situation in which no one can distract you.

Otherwise, any careless movement or reaction of a person to a distracting sound can lead not only to damage to the instrument, but also irreparable consequences, causing damage to human health.

Experts advise you to pay attention when the saw goes to the side during cutting. This indicates an uneven setting of the teeth, which needs to be corrected by increasing their deflection from the side to which the saw is pulled.

Mechanized disc sharpening

Materials and tools:

  • saw blade;
  • disc sharpening machine;
  • pendulum goniometer;
  • marker.

How to sharpen a circular saw in a mechanized way? There are many different machines available. Some mechanisms have software packages to provide a fully automated turning mode. In a home workshop, when disc turning is occasional, a simpler device can be used.

Saw blade teeth sharpening angles: rake angle (γ), rear (α) and bevel angles of the front and rear planes (ε1 and ε2).

How to sharpen a disc? In such a machine, after its installation and fixing in a position that provides the required sharpening angle, all other operations rotation of the blade around its axis, control of the thickness of the metal removed from the tooth performed manually.

Sharpening a straight tooth along the front plane is performed in the following sequence. Install the canvas on the frame of the machine. Clamped with a centering sleeve. Then, using a mechanism, it is installed in a strictly horizontal position. Thus, the bevel angle of the leading plane is ensured equal to zero. If the machine does not have a built-in angular scale, the horizontalness of the disc is checked using a pendulum goniometer.

Then the screw of the mechanism is rotated, which provides horizontal movement of the frame with a circle. The required rake angle is set. The blade moves in a position in which the front plane of each element fits snugly against the working surface of the circle.

A marker is made to mark the first tooth from which sharpening begins. Then the engine is turned on and the front plane is sharpened. The machine brings the tooth into contact with the circle and performs several movements of the blade back and forth while pressing the element against the circle.

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After sharpening one element, the blade is removed from contact with the abrasive wheel and rotated by one element. Then the operation is repeated in the same way. This is how the machine works until the element marked with a marker has completed a full circle, showing that all elements are sharpened.

Sharpening a beveled tooth differs from straight turning in that the saw is positioned with an inclination equal to the bevel angle of the front plane. To sharpen an element along the back plane, it is necessary that the machine allows the blade to be installed so that the back plane of the element is in the same plane with the surface of the circle.

To sharpen a circular saw on a machine, you do not need to have special skills. Anyone can cope with this work if they follow all the instructions and rules for working with disc sharpening machines.

Sharpening and setting the saw

The main cutting element of any hand saw. a series of teeth cut into the blade and representing wedge-shaped cutters. Wood, in the manufacture of all kinds of products from it, is sawn along, across and at an angle Θ to its fibers, in this regard, transverse, longitudinal sawing and sawing at an angle to its fibers are distinguished, and in each case, use the appropriate type of saw, which differs from others in shape teeth.

and. cross cutting; b. longitudinal sawing; 1.wood; 2. saw cut; 3. line marking for sawing; Θ. the angle of inclination of the marking to the wood grain with mixed sawing.

When transverse sawing, transverse saws are used, the cutting edges of the teeth of which, when moving in the wood, cut its fibers like a knife and form a cut. Longitudinal sawing differs from transverse sawing in that the direction of movement of the saw is parallel to the grain of the wood. The leading edges of the rip saws cut the wood like knives in a plane, and, going deeper, form a cut. When sawing wood at an angle Θ, universal (mixed) saws with teeth that are an intermediate form of teeth for cross and longitudinal saws are used to its fibers.

Saw blade sharpening

The circular saw is sharpened from the rear if you are working in a position facing the material being processed.

  • The front surface running into the material during sawing remains unchanged.
  • You can sharpen the disc directly in the machine. Otherwise, you can remove it from the machine or circular saw.
  • In the first option, you must first pull out the plug from the socket to prevent the consequences of starting the machine, which can happen accidentally.
  • The disc must be wedged, for which, on both sides of it, you need to put thin pieces of wood and press them down to the teeth.
  • With a marker, you need to mark the side of the tooth from which you will begin to sharpen. This will allow you to avoid mistakes in such a responsible work.
  • Attention and extreme caution must be exercised.

It is important to remember the number of movements you make when sharpening the first tooth, while you used a file or diamond file.

You will need the same efforts in order to sharpen all the other teeth.

If you removed the disc from the machine, it must be clamped in a vise in order to do the same activities that you read about above.

Then the disc returns to the machine, the unnecessary piece of wood is sawn. It is necessary to check the height of the teeth if your work was accompanied by a loud noise or an uneven feed was typical. This can be done by bringing a marker to the incisal edge and turning the disc by hand in a slow rhythm one revolution in the opposite direction to the direction of rotation. Each tooth will receive a mark; when examining the disc, it will be revealed which teeth are higher than the others. If there is a significant difference, it is necessary to carefully reduce their height.

Saw Tooth Set

The teeth are set when it is required to provide more free movement of the saw blade. The teeth in turn are bent in different directions by the same distance using a set. With its help, the tooth is folded back approximately in the middle of its height. The setting is a tool for making the saw teeth set, it has the shape of a plate in which there is a slot.
An adjustable wrench can also be used, which also successfully sets the teeth.

To work with soft woods, the teeth must be set more, in the case of hard ones. less. But this advice is hardly useful to those who work directly in the forest. Under these conditions, the degree of hardness, density and moisture of trees is hardly possible.
In order to choose the right wiring, you will have to test this device in different conditions, the best option would be three tenths to five tenths of a millimeter in one direction. The general requirement is to set the teeth no more than the blade thickness on both sides. It is necessary to do the wiring before sharpening.

Saw sharpening

Let’s go over the material how to sharpen a saw for wood or sharpen a circular saw.

How to sharpen a circular saw

  • Sharpening circular saws
  • How to set the disc teeth
  • Mechanized disc sharpening

How to sharpen a circular saw? Circular Saw it is a necessary tool in the construction of a summer cottage. It surpasses other types of saws in terms of its accuracy and cutting quality. The duration of the structure’s operation depends on the quality of its sharpening.

The service life of the circular saw depends, among other things, on the quality of its sharpening.

An unsharpened disc increases the load on the mechanism. As a result, it can break.

Periodic sharpening of circular saws is required.

Signs that indicate that the saw needs to be sharpened:

  • when sawing, a heavy load must be applied;
  • the edges of the cut burn;
  • the engine overheats;
  • smoke appears during operation.

Sharpening circular saws

Materials and tools:

Circular saw blades.

  • saw blade;
  • file;
  • diamond file;
  • marker;
  • thin wooden blocks;
  • vice;
  • wiring;
  • adjustable wrench.

How to sharpen a circular saw with a disc? The circular saw must be sharpened from the rear when working with the blade facing the tree. The front surface, which is on the material when cutting, remains in the same position.

You can turn the disc in the machine. You can pull the canvas out of it. If turning is carried out in the device, you must remove the plug from the electrical outlet to prevent accidental turning on of the device. It is necessary to glue the product by placing thin blocks under it on both sides and press them down to the teeth.

It is necessary to mark with a marker the element from which the turning is started. When turning, care must be taken and maximum attention must be paid. Turning is carried out with a file or diamond file.

It is necessary to remember the number of movements and applied forces when turning the first tooth. The same effort should be applied when turning the rest of the parts. If the blade is removed from the machine, you need to clamp it in a vice, then sharpen each tooth in the same way. Then the web is installed back into the device.

Check the cut on the sample. If there is noise during operation or the material feed is uneven, check the tine height. To do this, bring the marker to the cutting edge. Then you need to slowly turn the canvas by hand 1 turn in the direction opposite to the direction of rotation. In this case, a mark will appear on each tooth. On examination, you can find out which elements are higher than the rest. If the difference turns out to be significant, you need to carefully reduce the height of the elements.