Those who work with wood know how important circular saws are. This tool must always work properly and be in in perfect order. It is known that any piercing and cutting instruments have the ability to become dull. Wood circular saws are no exception. Their sharpening requires special attention. When the first signs appear that the saw is beginning to function poorly, you should start sharpening, as in the future the tool will begin to dull even more.

The circular saw is sharpened different ways: with a file, on a machine, in a vice and in the air.

Circular saws for wood, the sharpening of which is periodically necessary, are especially important when arranging country house made of wood. Circular saws are also called circular saws. This tool important in that he is capable of high accuracy cut wooden parts.

So is it possible to sharpen it yourself? Yes, self-sharpening possible. Timely sharpening circular saws woodworking will not only allow you to have a sharp working tool at hand, but also increase its service life. In particular, you need to monitor the condition of circular saws, whose power is relatively low, since a poorly sharpened saw begins to overheat. Overheating can completely damage the working tool.

Signs of worsening saw sharpness

If the following symptoms appear, you should immediately sharpen your circular saw:

Diagram of the structure of a circular saw tooth.

1. A noticeable increase in the temperature of the safety guard on the saw motor.
2. Cutting requires increased physical effort.
3. Possible temporary appearance of smoke from the engine.
4. The appearance of a burning smell.
5. The appearance of dark spots on the edges of the saw (carbon deposits).
6. The wooden beam does not move smoothly, but in irregular motions along the machine.
7. During operation, a suspicious noise is heard.
8. The teeth of the circular saw are observed to be bent.

Work requirements

There are also a number of work requirements, compliance with which is necessary for safety and high-quality sharpening of the tool. When sharpening, the disc must be installed in such a way that all teeth are clearly visible. Only in this case can quality sharpening be guaranteed. The disc must remain in the same position during sharpening. It should fit very tightly against the holding bars or vice.

In general, sharpening of the disc should be done on a machine. However, sometimes it is recommended to remove the disc and secure it in a vice. When bending the teeth, you need to secure the disc tightly in a vice and use pliers. The angle of inclination of each tooth must be monitored at all times. If the angle of inclination is not observed, the efficiency of subsequent operation of the tool will be close to zero. Before you start bending the teeth, you need to make appropriate notes on their original position.

Sharpening rules:

1. First of all, you need to ensure that the metal is removed evenly along the profile of the saw teeth.
2. Under no circumstances should you press the disc against the grinding wheel, as this can lead to heating and heating of the material, which leads to deformation.
3. The profile and height of the teeth should be maintained after sharpening.
4. When sharpening, it is also very important to use coolant.
5. It is impossible for burrs to form during sharpening.
6. As for sharpening edges, in theory there is a rule: you need to sharpen either the front side of the teeth, or the front and back. However, very often experienced craftsmen They sharpen it from the back side, as they believe that this is much more convenient.

Rules for setting teeth

Rules for sharpening a circular saw.

Before you start sharpening your circular saw, you need to know that this will require setting the teeth. The teeth should be bent to the side one by one and sharpened. However, it should be taken into account that the bending of each of the teeth must be done at the same distance. In order to do this, a special tool is used - wiring. Using this instrument, each tooth is retracted approximately at the middle of its height.

If the layout is done correctly, the cut width will be thicker than the circular saw blade. Correct sharpening assumes that the disk itself does not touch the cutting material, but only the teeth remove the surface of the wood layer by layer. Therefore, the wider the tooth set, the more voluminous the cut will be and the less likely it is that jamming will occur. However, achieving such an effect is extremely difficult. Many people start to spread the teeth using a wrench, but this method is completely unsuitable for expensive high-quality saws. Therefore, you need to use only the tool that is intended for this purpose.

When sharpening your saw, the type of wood that will be cut also deserves special attention. For softer types of wood, a wider spread is required so that the cut is smooth and free of roughness and unevenness. The most optimal deviation of the teeth is 5-10 mm to one side. The setting must be done before sharpening, since otherwise the teeth may be deformed and the saw will become unusable.

Scheme for sharpening a circular saw.

There are 3 main types of wiring:

1. Cleaning - with this arrangement, every third tooth remains in its original position. This type Suitable for cases where particularly hard wood needs to be cut.
2. Classic - the teeth alternately bend left and right.
3. Wavy - with this layout, each tooth has its own position, as a result of which a wave of teeth is formed. This method is one of the most effective, but also the most difficult. Experienced craftsmen leave a distance of 0.3-0.7 mm with this method.

Materials and tools used for sharpening

So, for work you may need:

• 2 bars;
• sharpener;
• vice;
• wiring;
• file.

Sharpening a circular saw: the classic method

There are several various techniques on sharpening circular saws, but the following technique is classic. Sharpening begins from the back surface. The front part, which runs into the material during operation, remains in the same position.

To begin sharpening the blade, you can leave the blade directly in the machine or remove it from the machine and secure it in a vice. With the first method, you must turn off the power to the machine by unplugging the cord from the outlet. To secure the disk in one position, 2 bars are used, which fix it like wedges. The bars must be pressed tightly against the teeth to prevent them from moving. The tooth from which sharpening begins should be marked with a felt-tip pen on the side.

When sharpening the first tooth, you need to remember the number of movements made with a sharpening wheel or other tool.

All subsequent teeth must be sharpened with the same intensity and number of movements.

When working in a vice, the principle of operation is the same. Some more experienced craftsmen perform weight sharpening, but this requires a lot of experience. After complete sharpening, the disc is inserted back into the machine. Next you need to cut up some unnecessary wooden block, while simultaneously monitoring the operation of the saw. You need to pay attention to whether there are any extraneous noises or uneven movement of the beam. If there is any extraneous noise or creaking, you need to take a felt-tip pen and fix it tightly near the saw. Then slowly turn the dial. As a result, you will see where the height of the teeth is greater or less than the rest.

Other sharpening methods

1. Full-profile - is the most accurate and high-quality, as it is performed professionally sharpening machine. A special circle, which is selected according to size, passes the entire interdental cavity at one time along with the surface of the adjacent tooth. With this sharpening, tooth deformation is eliminated. The only disadvantage of this method is that different saw blades require different circles.
2. Sharpening the edges of teeth - the convenience of this method lies in the fact that sharpening can be done both professionally and at home. If the work is performed on a machine, then you need to purchase special wheels for different disks. However, it is still better to do the work at home, since usually the amount of work is small and can be done using a regular needle file. For high-quality sharpening, it is enough to make 4-5 movements with a needle file - and the tooth will be sharp.

During work it is necessary to use safety glasses. When sharpening, you need to remove only the amount of metal that is necessary to completely remove cracks and deformations. When sharpening, the disk must remain in the same position relative to the machine all the time.

If you are not sharpening for a long time, more material will need to be removed. The shape of all teeth must be exactly the same, as well as the height. Any remaining burrs must be completely removed.

The saw blade of a circular saw consists of a steel blade (disk body) and plates with carbide tips in the form of cutters, the shape of which can be different.

To properly sharpen a disc, you need to know the geometry of the tooth and the basic rules of sharpening.

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

Saw blade tooth geometry Circular saws are made of durable steel grades, on the body of which carbide plates are attached using high-temperature soldering. The alloys used to make these brazes can be different. Domestic manufacturers mainly use tungsten and cobalt alloys. Foreign manufacturers chemical characteristics, but also on the size of the carbide phase grain used. A small grain size will provide the highest parameters of hardness and strength that the material will have.

The teeth of a circular saw can have different geometric shapes. Among them there are several main forms:

1. Straight tooth.
2. Oblique tooth shape.
3. Trapezoidal tooth shape.
4. Conical tooth.

Saws that have straight teeth are used to perform quick rip sawing. At the same time, the quality of such a cut will be quite low.

An oblique tooth can have a right or left angle of inclination. Very often, circular saws can be manufactured with alternately beveled teeth, i.e. when the teeth with the left and right angles will be repeated in turn. These saws are used for cutting chipboard in the longitudinal and transverse direction. Similar structural form will allow you to avoid the appearance of various chips on the surface of the material being processed. A saw, the tooth of which is made in the shape of a trapezoid, can be used for sawing MDF material. The peculiarity of such saws is the low wear of the tooth material and a fairly low cutting speed. Very often, trapezoid-shaped teeth alternate with straight ones, which are used for a cleaner cut.

Saws with conical teeth are used for auxiliary works when trimming the top or bottom laminated layer. Such a saw will protect against chipping and preserve the surface of the material being processed.

Sharpening rules

An oblique tooth can have a right or left angle of inclination.

To understand how to sharpen a disc correctly, you need to know that the main wear of its teeth occurs on the upper cutting edge. This edge is rounded during operation. The size of the rounded layer can reach up to 0.2-0.3 mm. The front edge of the surface also wears out quickly.

To perform such work you will need the following equipment:

1. Sharpening machine.
2. Pendulum goniometer.

The process of sharpening a saw with a straight tooth must be carried out along a plane located in front. To do this, it must be installed in a mandrel in a horizontal position.

Then, using the adjusting screws located on the sharpening machine, it is necessary to set the required angle at which sharpening will be carried out. The saw blade must move in such a way as to ensure the tightest fit to the surface of the abrasive wheel.

The thickness of the layer removed from the material will be regulated by the pressing force. After the first tooth has been sharpened, the disc should be moved away from grinding wheel. After this, it must be rearranged one step and the process continued. This is how you need to sharpen all carbide plates sequentially.

Sharpening of the beveled surface of a carbide tip can be done both along its front plane and along its rear. The difference from sharpening disk tips that have a straight surface will be that such saw blade must be placed at an angle that will correspond to the angle of inclination of the tooth.

To determine the required installation angle, you must use a pendulum inclinometer. Initially, you need to set the angle with positive value(+8, +10, etc.). Sharpening must be done through the tooth, this way the first half of the disk plates are processed. Having completed this work, the required angle of inclination is changed to negative and the second half of the teeth is processed.

The rear surface of the solder joints is a little more difficult to sharpen. To do this, you need a machine whose design will allow you to install circular saw so that the rear plane of the saw teeth is parallel to the plane of the grinding wheel.

Work without a machine and the quality of work performed

You can sharpen a circular saw not only using a special machine, but also using auxiliary tools. This method can be used in cases where there is no money or desire to purchase a sharpening machine. Most people use this hand tools infrequently, so there is no need to buy additional devices.

If you have a regular sanding machine, you can perform all the required procedures using it. To make work easier, you need to make a device that will allow you to fix the saw in the required position relative to the abrasive element. An ordinary metal stand is suitable for this, the surface of which will be located at the same level with the axis of the abrasive wheel.

You need to place the circular saw blade on this stand so that it lies in the required plane relative to the surface. It can be fastened using bolts, which at the same time help to adjust the angle of inclination.

The absence of chips and various cracks on the surface of the saw will help ensure the quality of the work performed. The rounding radii of all cutting edges must be within the following limits: 0.012-0.015 mm. During a visual inspection, there should be no glare on their surface.

By following the rules of work, you can confidently use a circular saw without frequent replacement saw blades. And their cutting part will perform high-quality cuts of the necessary products and materials without damaging their surfaces.

How to sharpen a saw blade, if you don’t have, not so much special equipment, but elementary devices - a vice and a file? The answer to this question lies in visiting a workshop where sharpening saw blades is part of their daily work.

Sharpening saw blades in Moscow

A dull circular saw is the reason for poor processing of the material, and sharpening saw blades in Moscow will eliminate this problem. If the circular saw is sharpened incorrectly, this is especially dangerous for units equipped with a low-power engine. After all, working with high voltage, it will constantly overheat and may fail.

To properly sharpen a circular saw, you need to know the sharpening angles of the saw blade, and for this you will need a machine for sharpening saw blades, which is especially appropriate in cases where materials from hard alloys. That is why turning to highly qualified specialists who thoroughly know their business is more than preferable.

Professional sharpening of saw blades – service price

Many people are concerned about the question: how much does professional sharpening of saw blades cost - the price of the service. Here, much depends on the type of sharpening (straight or oblique), as well as on the material from which the circular saw tips are made. In any case, purchasing such products costs many times more than sharpening them. That is why sharpening saw blades, the price of which is very affordable, is the best solution.

Where to sharpen a saw blade in Moscow? The answer to this question lies in our phone number, which anyone who needs such a service just needs to dial. Extensive experience and special knowledge in the field of sharpening various instruments– this is what distinguishes professionals from amateurs. Therefore, everyone who values ​​quality can confidently contact our company.

Sharpening circular saws with your own hands is not difficult for a person who has the skills to work with plumbing equipment. The popularity of circular saws is due to the advantages that the operation of this equipment provides. The main advantages of this tool are cutting accuracy, high quality and cleanliness of its surface. Circular saws are a very popular tool that is used very actively, which leads to rapid wear of the working surfaces. Restoring operability is carried out by sharpening the working element of the tool.

Signs of need for sharpening and tools used

In order to sharpen a saw, you need to prepare the following tools:

• file;
• assembly bench vice;
• block of wood;
• colored marker.

The circular saw is sharpened as needed. The need to sharpen wood saws is determined depending on the intensity of use of the tool.

Several signs indicate this:

1. Sharpening of saws is required if, during operation of the device, strong heating is observed on the safety casing in the area of ​​the electric drive. In some cases, rising temperatures cause smoke to escape from the saw's guard.
2. Saw sharpening is required when, in order to obtain a high-quality result, a stronger impact must be exerted on the circular saw.
3. During operation of the unit, dark marks appear at the site where the cut was made, which are traces of carbon deposits. The formation of such marks may be accompanied by the appearance of a characteristic smell of burnt wood. If these signs occur, you should stop using the tool and sharpen the working edges on the cutting elements of the electric saw saw wheel.

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Varieties of working elements of a circular saw blade

In order to know how to correctly sharpen elements on circular saw blades, it is necessary to study the structural features of that part of the circular tool with which wood is sawed. The main element of this part of the disk is the teeth. The production of teeth is carried out using carbide metals. Each tooth has four working planes:

• front;
• back;
• right and left side.

Planes provide a supporting role. The tooth geometry consists of one main and two additional cutting edges. The edges for cutting the material are formed at the intersection of the working planes. Depending on the configuration, all cutting parts of the working element of the unit can be divided into several types:

• straight;
• beveled;
• trapezoidal;
• conical

Straight teeth are used to perform accelerated longitudinal cuts. This type of cutting elements is not used to obtain ideal cutting quality.

Beveled working elements are characterized by the presence of a flat surface on the back of the tooth on the left or right side. Some models of circular saws have working elements with different bevel sides, which alternate with each other. Such discs are called alternately beveled. This type of disc is used when cutting is necessary, in addition to wood, chipboard and various plastics. The presence of a large bevel ensures high-quality sawing without chipping on the edges. The working elements have a trapezoidal shape in cross section. Thanks to the presence of this tooth configuration, the working elements of the disk are able to work for a long time without visible deterioration in the quality of the cutting edges.

Conical working elements have a cone-shaped cross section. Most often, discs with such working teeth are used as auxiliary ones when performing preliminary cutting of the laminate. Discs with such teeth help avoid chipping when cutting laminate flooring.

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Principles and angles of sharpening working elements of a circular saw

The working surfaces of the elements are sharpened at the four sharpening corners. The sharpening angles and the shape of the cutting element are the main parameters of the disk, on which the quality of the work performed depends. The circular tooth has two main angles (back and front); in addition, the characteristics of the working element include the cutting angles of the front and rear surfaces. The characteristics of sharpening angles depend on the purpose of the sawing device, the material being processed and the direction of processing.

A circular saw intended for longitudinal cutting of material is sharpened at a large rake angle; for sawing in the transverse direction, a sharpening angle of 5-10° is used. A universal sharpening option is considered to be an angle of 15°. The sharpening angle of the working elements is influenced by the level of hardness of the material being processed. The harder the material being cut, the smaller the sharpening angle the saw tooth should have.

During the operation of the tool, the upper cutting edge wears out as much as possible. As a result of using the tool for its intended purpose, rounding occurs cutting edge. The rounding rate can reach 0.3 mm or more. Among the planes, the front one is subject to maximum wear.

Proper sharpening should provide edges with rounding of no more than 0.2 mm.

For this purpose, simultaneous grinding of the rear and front planes of the working elements is used. This sharpening method is optimal. It is possible to sharpen only the front plane, but in this case the sharpening process requires more time, and the tooth wears out faster due to the fact that the metal needs to be ground down. With standard sharpening, it is necessary to remove metal with a thickness of 0.05 to 0.15 mm.

How to sharpen a circular saw? A circular saw is necessary tool during the construction of a summer house. It is superior to other types of saws in its accuracy and cutting quality. The service life of the structure depends on the quality of its sharpening.

Life time 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 may break.

Circular saws require periodic sharpening.

Signs that indicate that the saw needs to be sharpened:

• when cutting, you need to apply a large load;
• the edges of the cut burn;
• the engine overheats;
• smoke appears during operation.

Sharpening circular saws

Materials and tools:

• 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 back surface if you work with the blade facing the wood. The front surface, which touches the material when cutting, remains in the same position.

You can turn a disk in a machine. You can pull the canvas out of it. If turning is performed in the device, then you need to remove the fork from electrical outlet to prevent the device from being turned on accidentally. You need to wedge the product by placing thin blocks under it on both sides and pressing them against the teeth.

It is necessary to mark with a marker the element from which turning begins. When turning, you must be careful and apply maximum attention. Turning is performed using a file or diamond needle file.

It is necessary to remember the number of movements and efforts applied when turning the first tooth. The same efforts must be made when turning other parts. If the blade has been removed from the machine, you need to clamp it in a vice, then sharpen each tooth in the same way. Then the canvas is installed back into the device.

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

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How to set disc teeth

If it is necessary for the disc to move more freely, then the teeth are set.

It is necessary to bend all the teeth one by one different sides to the same distance. The work is done using wiring. Layout is a tool for routing elements. To perform the wiring, you can use an adjustable wrench. When working with soft woods, they are diluted more. When working with hard rocks – less.

To choose the right wiring, you need to test the device when cutting durable wood. The best option the wiring will be approximately 0.3 - 0.5 mm in one direction. The main requirement is to distribute elements no more than the thickness of the fabric on both sides. The layout is carried out before sharpening.

In the case where it is necessary to turn the blade more High Quality, use a machine for mechanized turning.

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Mechanized disc sharpening

Materials and tools:

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

How to sharpen a circular saw mechanized way? Exists a large number of various machines. Some mechanisms have software systems to provide fully automated turning mode. In a home workshop, when turning discs is occasional, you can use a simpler device.

The sharpening angles of the circular saw teeth are: rake angle (γ), back angle (α) and bevel angles of the front and rear planes (ε1 and ε2).

How to sharpen a disc? In such a machine, after it is installed and secured in a position that provides the required sharpening angle, all other operations - turning the blade around its axis, controlling the thickness of the metal removed from the tooth - are performed manually.

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

Then the screw of the mechanism is rotated, which ensures horizontal movement of the frame with the circle. Set the required rake sharpening angle. The canvas moves in a position in which the front plane of each element fits tightly to work surface circle.

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

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 a similar way. This way the machine works until the element marked with a marker completes a full circle, showing that all elements are sharpened.

Sharpening a beveled tooth differs from sharpening a straight one in that the saw is placed at an angle, equal to the angle bevel of the front plane. To sharpen an element along the back plane, it is necessary that the machine allows you to install the blade so that the back plane of the element is in the same plane as the surface of the circle.

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