Sharpening angles for circular saws. What you need to know when sharpening carbide-tipped saw blades. How to know when it's time to sharpen your saw blade

Sharpening of circular saws is a mandatory measure during operation. this equipment. Woodworking requires the master to have tools with the appropriate cutting properties at his disposal. Like sharpening chainsaw chains, circular saws require increased attention. If the shortcomings are not eliminated in time, over time the tool will begin to dull much faster.

Saw sharpening is a common activity, as is do-it-yourself chainsaw chain turning. You can entrust the device with hard-alloy, victorious soldering to specialists. This is due to the fact that pobedit solderings have increased hardness, which is why it is impossible to sharpen with an ordinary file. This will require an expensive diamond grinding tool.

The first thing you need to do is determine the current condition of the saw blades. Chainsaw blades and chains show certain signs of wear. If you know about them, you will easily know that the sharpness of the circular saw has deteriorated significantly.

The temperature on the engine cover of your saw blade has begun to rise significantly.
To cut the workpiece, you have to make more physical effort with your own hands. A similar phenomenon is typical for blunt chainsaw chains.
From time to time, smoke may come out of the engine.
When processing blanks, it is formed unpleasant odor burning
Dark spots form on the edges of the saw blade. This is soot. It can also appear on the surface of chainsaw chains.
The wooden workpiece begins to move around the machine in jerks, although during normal sharpening the movements should be smooth.
During the operation of the machine, extraneous noise is observed.
The tooth geometry of the saw blades of your circular saw is broken.

General sharpening rules

Photo ways to sharpen circular saws

As in the case of sharpening chainsaw chains, self-sharpening requires adherence to certain guidelines.

Carefully monitor the uniform removal of metal along the profile of the teeth of the saw blade;
Never press the saw blade tightly against grinding wheel. If the saw sharpening machine is in close contact with the wheel being sharpened, this will lead to overheating and further deformation of the material;
Make sure that the height and profile of sharpening are maintained at the end of the processing operations;
When sharpening discs, use coolant. This is also recommended for those who turn chainsaw chains;
Avoid burr formation when turning the saw blade;
When sharpening edges, rely on important rule. It is necessary to sharpen only the front, or the front and back side of the tooth. Although in practice, many do-it-yourself craftsmen prefer to sharpen the saw wheels from the back side, considering this method more convenient;
Products with victorious soldering are sharpened with diamond sharpeners. Only such tools can really effectively restore the cutting properties of this tool. Apply regular file It is possible, but in fact it will not give the desired effect.

Sharpening methods

you can use grinding machine for saws or hand tools.

There are three main sharpening methods, where a specific device is used, and the rules for processing discs are followed. Which of them is the most correct, it is difficult to say. After trying each technique, you can draw certain conclusions for yourself.

Sharpening happens:

classical;
full profile;
Sharpening the edges of the teeth.

We will tell about each of them separately.

classical

This sharpening technique has been used for a long time, which is why it got its name.

Sharpening starts from the back of the disc.
The front part, running on the material during cutting, remains in its unchanged position.
Processing can be carried out directly on the circular saw or the saw blade can be removed by placing it in a vise.
If you sharpen on a circular, be sure to unplug the machine from the power supply.
To fix the disk, use a pair of bars that will secure the circle like wedges. The bars should be tightly pressed against the product in order to prevent its movement during turning.
With a felt-tip pen, mark the first tooth where you will start.
Perform a certain number of movements on the first tooth with a grinder. Remember their number.
For all subsequent teeth, repeat movements similar in number and intensity.
Upon completion of sharpening, be sure to check the performance of the saw updated with your own hands. If there is no extraneous noise, vibration and disk machine behaves stably, you managed to get the job done right.

Alternative Solutions

To alternative ways sharpening include those two methods that we described above. They are quite effective, therefore they are often used by masters.

Full profile saw blade processing. Among all turning methods, this method can be considered the most accurate and high quality. This is due to the fact that specialized grinding machines are used for full-profile sharpening. A special circle is selected in size and in one go passes the entire cavity between the teeth of the disc, while capturing the surface of the adjacent cutting edge. This technique of turning saw blades avoids the possibility of deformation of the tooth circle. The only downside to the sharpening method is that you will need to use the appropriate different wheels to process saws of different profiles.
Teeth edge turning. Popularity this method tool turning circular saws due to the fact that it can be used on professional level and in normal home conditions. If sharpening is carried out using a machine, you will need to purchase the appropriate abrasive wheels that match the parameters of your saw blades. But it is optimal for most owners of circular saws to use home method processing. This is due to the fact that often it is not required to carry out a large amount of work, and all processing of the cutting edges is carried out with a needle file. To effectively sharpen the product, sometimes it is enough to carry out 4-5 movements with a high-quality needle file. So the teeth will acquire the necessary degree of sharpness.

Experience is useful thing, thanks to which you can avoid a number of mistakes that are typical for beginners. Therefore, paying attention to the advice of specialists is very useful if you want to achieve a positive result for yourself when turning a circular saw.

Always use protective glasses. For some reason, many people ignore this rule, because of which the masters themselves suffer later. Therefore, before starting sharpening, be sure to put on all necessary funds protection;
Do not attempt to remove more metal than required. Remove only enough to remove all existing cracks, burrs and bumps;
During turning, be sure to keep the disc in the same position;
If the disc has not been sharpened for a long time, you will have to remove a larger layer of metal;
Observe the identity of all teeth in shape and height.

Initially, it seems that sharpening is a technologically complex process. But with a little experience, you can easily sharpen circular saw blades.

Saw blade sharpening takes 15 to 30 minutes

In any construction business, there will be a building country house or cottages, in any business you need a circular (or circular) saw. It surpasses all other devices and types of saws in terms of the quality of its performance.

Sharpening of circular saws in our stands from 150 to 450 rubles.

In order for the circular saw to work efficiently and productively, it is necessary to monitor the sharpness of its sharpening. This will significantly increase the time useful work and the quality of the processed material. If sharpening circular saws is done manually, you will need the following tools: a file, a vise and a block of wood.

our work on sharpening knives and other tools

Produced on professional equipment- on machines for sharpening circular saws.

Our workshop is located

We are open 7 days a week from 10:00 to 20:00

Poor sharpening quality is especially detrimental to circular saws endowed with low power engine. A low-powered motor will work with a lot of voltage, while overheating, so the likelihood of a saw blade breaking will be much higher than saws with larger power units.

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The cost of sharpening a circular saw is from 150 to 450 rubles

When signs of blunting appear, urgent sharpening of circular saws is required. The signs of blunting are as follows: when sawing wood, physical efforts are needed higher than with a sharply sharpened saw; soot appears, dark marks along the edges of the cut and the smell of burning; the protective cover on the surface of the motor becomes hot, smoke may form.


	Saw blades with metal tips are much more durable
	Hard metal soldering is prone to chipping and cracking if not sharpened in time.

Sharpening a saw blade by hand

You should start sharpening from the back surface, which faces the material, while it is more convenient to sharpen if you do not remove the disk from the machine. The machine must be de-energized during sharpening. To ensure a more secure fixation of the disk, it is better to fix it with two wooden blocks placed on both sides. Mark with a bright marker the saw tooth from which you will start sharpening. You need to sharpen every single tooth evenly, with the same pressure on the file and the same number of movements.

After the whole procedure, when all the teeth of the saw are sharpened the same way, you need to insert the disc into its place and try processing wooden block. Check if there is any extraneous noise or vibration, perhaps the teeth are sharpened unevenly and correct the sharpening errors.

Sharpening circular saws with grinders

Sharpening is carried out more efficiently with the help of grinding machines, they are available in specialized services and workshops.

If the saw blade is dull, it is not necessary to buy a new one. After sharpening the saw
will work with the same performance as a new one, only sharpening will cost you much less than buying a new drive.

Sharpening of a circular saw in workshops is carried out using diamond wheels, this is necessary because the saw teeth are made of hard alloys, a diamond wheel allows you to remove a minimal layer of metal. And this means that the saw can be sharpened many times without compromising its suitability for subsequent work.

In another way, circular saws are called circular. It is impossible to work normally with a blunt saw, chips and errors begin to appear on the material being processed.

Circular saws are sharpened on special equipment, setting the desired angle for each saw diameter. This ensures that the saw after such sharpening will work no worse than a new one.

It is necessary to take into account exactly what sharpening angle is needed for each particular saw, this requires high precision from the sharpener. It is necessary to consider what material each saw is intended for - for wood, plastic or other material.

Therefore, it is best to contact professionals, specially trained specialists in the field of sharpening circular saws. This way you can save not only time, but also money. And enjoy to the fullest the result of your work, obtained as a result of using a well-ground circular saw.

Any construction cannot do without a circular saw. When performing various operations, it is necessary to make cuts and cuts. With the help of a circular, it becomes possible to quickly and high quality cut any tree. With continued use of this device cutting tool blunts, the performance of the operation decreases. Sharpening of circular saws becomes the most important operation.

Classification of circular saws

To obtain a clean cut, it is necessary that the sharpening of the circular saw blades is done correctly. Tools are divided into several groups:

All-metal.
The working area of the disk has a hard coating.
Carbide plates are soldered onto the saw teeth.

The teeth of the saw after sharpening must be divorced. If you work with a dull tool, the drive begins to experience additional load, the quality of the cut suffers.

If the disk works with solid wood, it must have special technological grooves. Their absence leads to overheating of the blade, the metal will begin to expand, and deformation of the cutting tool will occur. A dangerous vibration will appear, the quality of the cut will suffer.

Varieties of cutting surfaces

To improve work efficiency, engineers have developed several types of teeth that differ in their shape and sharpening angle:

On some canvases, the front plane of the tooth has a concave shape. This tool is used to make cross cuts.

Correct sharpening angle

Circular saws have teeth with two angles:

back.
In front of him.

The value of the angle depends on the type of material being processed, the purpose of the operating equipment and the direction of sawing. For example, to obtain a longitudinal cut, the front angles are made within 15-25 degrees. For a cross cut, the rake angle will be in the range of 5-10 degrees. An angle of 15 degrees is suitable for processing any material in the right direction. The angle value depends on the hardness of the workpiece being processed. The harder the material, the sharper the teeth need to be sharpened.

Methods for processing disk blades

To form a cutting edge, any grinder is suitable where the design of the equipment does not It has of great importance . Of course, the sharpening angles of carbide-tipped disc plates are more accurately obtained on specialized equipment. However, its cost is very high, so they use a conventional grinder, which has the ability to change the slope of the corundum disk.

To sharpen a circular disc yourself, you must strictly fulfill several basic conditions:

Usually the top edge is deformed. Sometimes the rounding of the edges reaches 0.3 mm. Therefore, sharpening starts from the top.
Processing is carried out taking into account the leading edge and its rear part.
The operation is repeated at least 25 times. The thickness of the removed metal should not exceed 0.05-0.15 mm.
The quality of processing must be exactly the same on the entire surface to be treated.
After the end of sharpening, it can be fine-tuned manually with fine-grained sandpaper.

Sharpening carbide-tipped tools

Sharpening circular saws with victorious tips often causes problems. Processing with standard abrasives takes a very long time, and if the material is overheated, it can be “released”. Of course, processing with a diamond tool will be much faster, but its cost is very high. It will be much more economical to purchase a victorious disk.

Each master approaches the solution of this problem purely individually. To get the correct sharpening angles for carbide-tipped saw blades, you will definitely need a machine.

Home processing of toothed blade

To process a circular saw, it is not necessary to have a special machine for sharpening circular saws with your own hands. To fix the fabric in a certain position, you can use a flat stand, which has several nuances:

The surface must be flush with the center of the grinding wheel.
The plane of sharpening should be at an angle of 90 degrees relative to the gear circle.
To create a different slope, the fixture must have a swivel joint.

To select the desired angle, make a mark with a colored marker. The device must be installed in a powerful grip. Not even the slightest movement of the special stand is allowed.

The process of building private houses and various buildings will be quite difficult without the use of a circular saw. It is much better than many saws for wood, because it surpasses them in accuracy and cleanliness of the cut.

Because of this tool actively exploited, it wears out rather quickly, and therefore sharpening circular saws with your own hands becomes extremely necessary.

What you need to sharpen circular saw blades

First of all, you need to prepare the appropriate components that will allow you to properly sharpen the saw blade for wood. It is important to provide the following tools:

file;
mounting vice;
wooden bar;
colored marker.

How to know when it's time to sharpen your saw blade

The saw blade should be sharpened only when necessary. You can recognize the onset of such a moment by two clear signs. In particular, an urgent sharpening of a circular saw on wood is necessary:

If strong heat regularly occurs on the saw guard in the area of the electric motor. In some cases, with such an increase in temperature, smoke is released under the casing.
With strong pressure on the tool to obtain a good cut in the process of processing the material.
If dark marks appear, traces of soot on the wood and a characteristic smell of burnt wood. This is due to the fact that the saw teeth are blunt.

Varieties of sharpening cutting teeth

For better understanding In order to sharpen circular saws, it is necessary to study the features and structure of those parts of the tool through which the material is sawn. Cutting teeth are the main element involved in sawing wood.

They are made of hard metal. The cutting teeth consist of 4 working flat surfaces: front (a), back (b) and two side planes (c), which have an auxiliary role. By means of one main (1) and two additional (2 and 3) cutting edges, intersection lines are formed for each specified working plane.

Depending on its configuration, a circular saw may have different kinds cutting teeth:

Straight tooth type. Often used for accelerated longitudinal sawing. They do not have the ideal cut quality.
Beveled (oblique) type of teeth. They have a characteristic angular edge on the right and left rear surfaces. In some cases, the blades have teeth with different sides of the bevel, which alternate around the entire circumference of the saw. Using such discs, you can cut wood, chipboard and various plastics. A large bevel angle ensures a high-quality cut without chipping on the cutting edge.
Trapezoidal teeth. The cross section of the cutting surfaces have a trapezoidal shape. This configuration allows you to work without blunting for a long period of time. Often the disc has straight teeth, which alternate with trapezoidal. In such cases, the trapezoidal element plays the main role in rough sawing, while with the help of a straight type of teeth, finishing is performed.
Conical tooth type. They have a conical shape. As a rule, they perform an auxiliary function for preliminary cuts on the laminate. The conical type of teeth is used to process the specified floor covering. Such a saw allows you to prevent chips on the material, as often happens when using the main saw.

Video "Sharpening disks for a circular saw"

The process of sharpening a circular saw blade.

The principle and angle of sharpening discs for a circular saw

The working part of the circular saw is sharpened at 4 main sharpening angles. They belong to the main technical parameters cutting disc, as well as the type of shape of the cutting teeth.

It is worth noting that all the teeth of a circular saw are characterized by front (γ), back (α) angles, as well as the cutting angle of the front and back surfaces (ε1 and ε2). The value of each specified angle must correspond to the purpose of the sawing devices, the materials to be sawn and the direction of sawing.

In particular, a rip saw is sharpened at fairly large rake angles (15° - 25°).

The indicators of sharpening the front angles for transverse types of cut are in the range of 5 ° - 10 °. Universal options used for processing materials in all types of directions are standardly sharpened at 15 °.

In this case, the value of the specified angle is also influenced by the fact that the cut objects have hardness. Their value has a strict dependence: with a greater hardness of the material that is being cut, the cutting teeth should be less sharpened.

According to the main principle of sharpening teeth on a carbide saw blade, it is important to consider that during long-term operation, the most significant wear processes occur on the upper cutting edges. As a result, with intensive use, their lines can be rounded up to 0.3 mm or more. Regarding the planes of the teeth, it is worth noting that the greatest wear occurs on the front surfaces.

With proper sharpening of the cutting element, such shapes of the cutting edges should be provided in which the radius of their rounding will not exceed 0.2 mm. In this regard, it is recommended to perform parallel grinding of metal on the front and rear planes of the teeth. The use of this method is considered the most appropriate. It is possible to sharpen only one front plane, but in such cases, this operation requires more time. In addition, the teeth will wear off faster as more metal needs to be ground off the rake surfaces.

The standard layer for grinding metal is a value of 0.05-0.15 mm.

How to sharpen a circular saw with your own hands

You can sharpen the saw at home completely on your own. For these purposes, there is no need to visit a workshop to use a specialized grinder or purchase it. It is quite expensive, and is used for sharpening in rare cases, unless of course you plan to use it for large-scale production purposes.

But holding saw blades in your hands while sharpening teeth with a grinding wheel is not the most the best solution. A circular disk is not a drill, it is much larger. No hardness of the hands and an excellent eye will not allow sharpening so that the cutting elements are sharp enough and suitable for effective use. To do this, you need to provide the simplest fixing device.

To hold the gear circular circle in the desired position relative to the plane of the grinding tool, you can use the most ordinary flat stand.

The position of its surface must correspond to the level of the axles on the rear disk. The toothed circle is placed on a stand so that the tooth plane to be sharpened is perpendicular to the blades of the saw blade. To sharpen beveled teeth along the front and rear surfaces, it is necessary to provide movable hinges in this device.

But in such cases it is quite difficult to maintain the same values of the front and rear angles of tool sharpening. To eliminate this problem, it is necessary to perform a rigid fixation of the center of the saw according to the desired position in relation to grinding wheel. This is done using grooves for the mandrel, which is mounted on a stand with sharpening saws placed on it, or by installing a special stop on the stand, which will fix the saw blade according to the required angle to the abrasive stone.

If you follow all the requirements that apply to sharpening a carbide circular saw, then this tool will work as efficiently as possible over a long period of time.

Video "How to sharpen a saw blade with your own hands"

Demonstrative video on the implementation of self-sharpening of the cutting saw blade.

Circular saws are used everywhere in construction. Many jobs require changing the dimensions of the used building materials, creating notches and much more. The circular saw allows you to quickly cut through the most various materials, while the cutting speed is very high, and the quality of the cut is the best. The constant use of the equipment in question determines that the cutting tool begins to become dull, this has a significant impact on the efficiency of the work carried out and their quality. That is why many people think about how sharpening circular saws is done with their own hands. After all, the ability to perform such work qualitatively will significantly save.

Required Tools

Do-it-yourself disks for a circular plate can only be sharpened with special tools. There is also a machine that allows you to automate the process, make it more efficient.

To carry out work on sharpening the disk with your own hands, you can use the following tools:

mounting vice;
file;
a block of wood.

You can also use a circular saw sharpener that does not require the above tools.

When is it necessary to carry out work on the restoration of circular saws?

Quite an important issue can be called the determination of when the sharpening of circular saws should be carried out. Severe wear can lead to the inability to carry out such work. There are three clear signals that determine the need for sharpening a circular saw blade:

The appearance of smoke, heating of the protective cover. The fixture, as a rule, has a special protective casing that can heat up if the disc becomes dull. It should also be noted that in special cases, smoke occurs due to the strong heating of the cutting zone.
Also, with mechanical feed, when the pressure is adjusted by hand, a lot of effort should be applied to obtain the desired result.
When processing wood or other material, traces of soot and a corresponding smell appear in the cutting zone.

Principles and angles of sharpening circular saws

The saw has four main angles of sharpening of a circular saw on a working part. The angles under consideration, as well as the shape of the tooth itself, can be called the main ones. operational characteristics. Each tooth can be characterized as follows:

front and rear corner;
cutting angles of the front and back surfaces.

The values of the above parameters depend on the purpose of the sawing device, the type of workpiece material.

According to the above parameters, several saws can be distinguished:

for longitudinal cutting. AT this case the rake angle should be between 15° and 25°.
when performing cross cutting, the considered indicator should be from 5 ° to 10 °.
the universal version is recommended to be sharpened at an angle of 15 °.

The type of material being processed also determines what performance the tooth should have. As a rule, the harder the material, the more difficult it is to machine. That is why it is recommended to sharpen the cutting teeth to a lesser extent.

When a carbide saw blade is used for a long time, significant wear occurs on the uppermost cutting edge. When considering the plane of the tooth, it is worth noting that more wear occurs on the front surface.

Sharpening circular saw blades at home

You can sharpen the saw with your own hands without using a special grinding machine, which is very expensive and is rarely used for its intended purpose due to the use of carbide material to create the cutting edge. However, you can’t just hold the circle in your hands, since you need to achieve certain cutoff parameters to ensure the required performance indicator.

To fix the gear wheel in a strictly specified position, an ordinary flat stand is used. It has the following features:

The surface of the flat stand must match the level of the axis of the grinding wheel.
We place the gear circle on a stand so that the sharpening plane is perpendicular to the saw blade.
The device under consideration for teeth located at a certain angle is equipped with a swivel joint.

The device under consideration allows fixing the element being processed in relation to the abrasive material used. With the help of a colored marker, marking lines are applied, which allow you to choose correct angle. A vice is also needed in which the created fixing device is attached.

Sharpening with a machine

If it is possible to purchase a special machine, then the process in question can be carried out with the maximum efficiency indicator. Such a device has a compact size, it can be used at home.

Particular attention is paid to the choice of abrasive wheel. In this case, we note the following nuances:

Carbide discs are difficult to sharpen.
When choosing, you should pay attention to circles made of elbor, with diamond grit or with green silicon carbide.

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