How to sharpen circular saws correctly
Types of cutting teeth
There are four planes on the surface of the teeth. front, back and two side.
At the moment of intersection with each other, they create a single cutting edge, due to which the sawing of surfaces occurs.
There are several forms of teeth:
- Straight tooth. Most often it is used only for a quick longitudinal cut. During such work, quality and accuracy are practically unimportant.
- Oblique tooth. The back plane of such a part is tilted to the right or left. On saws, these teeth often alternate, which is why they are called “alternately cut”. These teeth are most commonly used in tools. The size of the corners can be different, this is due to the coating of the treated surface. wood, chipboard, plastic. They are used for longitudinal and transverse movements. A large angle of inclination on the tools is used when cutting boards with double-sided lamination. This helps to avoid chipping of the material. The larger the chamfered corner, the easier the saw will cut through the surface. But this greatly increases the likelihood of tooth breakage. On some products, the teeth are inclined not only at the back, but also at the front.
- Trapezoidal tooth. The main advantage of this type is that the edge dulls slowly. But they are rarely used separately, usually alternated with straight teeth. During the operation of the device, the trapezoidal teeth are located above the straight ones, therefore, they take over the main (rough) sawing work. Straight teeth for finishing. This saw design is used for sawing plastic, chipboard and MDF.
- Conical tooth. This type of tooth is considered optional because it only helps to cut the lower part of the material (most often the laminate). This design allows you to protect the surface from chips and cracks. Bevel teeth usually have a straight front edge, but it can also be concave. This type is used for finishing the saw cut.
Important! Each type of teeth requires a thorough grinding when sharpening. You can’t sharpen them at the same angle.
Sharpening principles and angles
There are four main sharpening corners at the edges of the saw. Together with the shape of the tooth, they can be the main operational characteristics of the tool. The following are used to describe each tooth:
- Front and back angle.
- Cut angles of the front and back surfaces.
These characteristics may depend on the type and weight of the circular saw, its purpose, as well as the density of the particular surface.
Sharpening angles in the diagram
Based on the parameters indicated above, all circulars can be divided into several types:
- For slotting longitudinal holes. A 15 to 25 degree rake angle should be used for this task.
- For cross-cutting. In this situation, the rake angle can vary from 5 to 10 degrees.
- Universal sharpening. Saws are sharpened at an angle of 15 degrees for any operation.
The size of the sharpened angle is not only determined by the direction of movement of the saw, it is also related to the material of the workpiece. When cutting through very hard materials, the smallest angle should be chosen. To work with softer products, the angle increases.
Best way to sharpen saw blade
Important! If a carbide saw has been used for long enough, maximum wear will be seen at the top cutting edge. A detailed examination of the plane of the tooth shows that the anterior surface of the material suffers the most.
How to properly sharpen a circular saw with your own hands?
A circular saw, which, according to old memory, is still called circular, is an indispensable tool for the owner of a private household. It copes equally well with wood and drywall, non-ferrous metal or acrylic glass, but one of the conditions for high-quality and trouble-free operation is regular sharpening of the cutting blade. The cleanliness and durability of this tool is much higher than that of other types of sawing products for hard materials.
A circular saw (circular saw) is designed for cutting a wide variety of materials. In the process of work, the teeth become dull and need to be sharpened correctly.
The circular saw is in no way inferior to the chain chainsaw popular among the population, and even surpasses it in many ways in capabilities. With its help, you can make a transverse, longitudinal or oblique cutting of the material required for the construction or manufacture of joinery. The number of teeth on a circular saw blade depends on the hardness of the material being processed, but in any case, its smooth movement can only be ensured by correct setting and sharpening of the teeth.
Using a machine
When the foreman has access to a special grinding machine, the elements are processed quickly and efficiently. This device is small in size, so it is comfortable for a beginner to work with it. There will be no problems even when used in a domestic environment.
When buying such a device, they look at the abrasive wheel. To select it, certain nuances are taken into account:
- It is best to purchase a wheel made of diamond-coated CBN or green silicon carbide;
- If the carbide wheel is sharpened, problems may arise even when using the machine.
The very process of using a sharpening machine is extremely simple. The operator should comfortably position the disc on the device and clamp it using the special retainer. Before starting work, it is recommended to mark the first tooth with a marker. This will help you avoid getting tangled while sharpening and not checking teeth that have already been cut. To select the sharpening angle, a special meter is provided on the device. The required angle should be set on it, after which the device will complete the task on its own.
The circular saw is a useful tool that you cannot do without during construction. It helps to make cuts in surfaces, as well as change their shape and size. To sharpen discs, use special machines or materials at hand. It is not so difficult to do the work with your own hands, you need to adhere to the listed recommendations and not be afraid.
Sharpening a disc with victorious solders:
How to determine wear?
Checking the saw blade for wear is an important issue that should be given special attention. Deep damage leads to the inability to sharpen the circle. There are three main signs by which you can understand that the saw needs to be sharpened or replaced:
- Excessive heating of the protective cover and the formation of smoke. The circular saw has a special cover that signals when the saw has become blunt due to heating. In especially difficult situations, smoke may appear from it.
- Sometimes the saw device involves a mechanical feed (if you need to adjust the pressure with your own hands). In such a situation, wear can be noticed if the pressure has to be increased.
- If carbon deposits and strong unpleasant odors form on the workpiece when sawing wood.
All situations described above tell the user to sharpen the device.
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 grinding machine or to purchase one. It is quite expensive, and is rarely used for sharpening, unless of course you plan to use it for large production purposes.
But holding the saw blades in your hands while sharpening the teeth with a grinding wheel is not the best solution. A circular disc is not a drill, it is much larger. No hardness of hands and an excellent eye will allow you to sharpen 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 toothed circular circle in the desired position relative to the plane of the sharpening tool, you can use the most ordinary flat stand.
The position of its surface should correspond to the level of the axes on the rear disc. The gear wheel is placed on a support so that the sharpened plane of the tooth is perpendicular to the saw blade. To sharpen beveled teeth on the front and rear surfaces, you need 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 sharpening angles of the tool. To eliminate this problem, it is necessary to firmly fix the center of the saw in accordance with the desired position in relation to the grinding wheel. This is done using grooves for the mandrel, which is mounted on a stand with the sharpened saws 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 adhere to 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.
Varieties of sharpening cutting teeth
For a better understanding of how circular saws are sharpened, it is necessary to study the features and structure of those parts of the tool through which the material is cut. Cutting teeth are the main element involved in sawing wood.
They are made of carbide metal. The cutting teeth consist of 4 working flat surfaces: front (a), rear (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, the mowing line intersects, each specified working plane.
Depending on its configuration, a circular saw can have different types of cutting teeth:
- Straight type of teeth. Often used for fast rip sawing. Do not have perfect cut quality.
- Beveled (oblique) type of teeth. They have a characteristic corner cut on the right and left back 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. Large bevel angle ensures high-quality cuts without chipping at the cutting edge.
- Trapezoidal type of teeth. The cutting surfaces have a trapezoidal cross-section. This configuration allows you to work without dullness for a long period of time. Often, the disc has straight teeth, which alternate with trapezoidal ones. In such cases, the trapezoidal element plays a major role in rough sawing, while the straight tooth type is used for finishing.
- Conical type of teeth. They have a conical appearance. As a rule, they perform an auxiliary function for preliminary cuts on the laminate. The conical type of teeth is used for processing the specified floor covering. This saw prevents chipping in the material, as is often the case with the main saw.
How to sharpen correctly?
The tool sharpening process is quite simple. The blade is clamped in a vice and the teeth are sharpened alternately. First, this is done on one side, and then, turning the canvas over, the manipulations are repeated. Movements should be extremely accurate and monotonous.
Sharpen the saw from the inside towards the setting. Naturally, in this case, it is necessary to observe precautions by wearing special gloves. It is recommended to evaluate the result using the “control sawing”. The difference “before and after” should be significant: the resulting cut is smoother, much less effort is made.
Each saw tooth can be viewed as a small knife, and in the case of a chain saw, as a small plane that enters the material at different angles depending on the technological purpose of the tool.
Teeth can be straight and oblique, trapezoidal or conical. Oblique. the most common, conical, as a rule, perform auxiliary functions, in particular, they are used for cutting laminate.
In any case, the result should be the same: the hand tool at each point moves with equal efforts the same number of times. Burrs are removed with a very fine cut file. For suburban construction or major repairs at home, you can use compact machines.
Before sharpening round discs that are used for working on aerated concrete, you need to clearly understand what kind of alloy we are talking about. Not every abrasive material will cope well with the task: the harder the metal, the more difficult it is to sharpen it.
The wear of the stone and the cleanliness of the processing depend on the correspondence of the abrasive material to the metal, including the grain size. When using machine tools, the speed of rotation also affects the efficiency of sharpening.
The cutting tool can be tipped and carbide tipped. In this case, experts recommend using abrasive wheels with diamond chips or products made of CBN and silicon carbide. Circular saws sharpen from the side of the rear working surface that is in contact with the material.
How to sharpen a saw correctly?
What tools are needed?
Various types of saws make their own adjustments to the list of tools used for sharpening. For a regular hacksaw, a triangular file is required, needle files are also used.
In addition, you will need a clamping device, for example, a vice, or you will have to make a special device yourself. In this case, bonded plywood sheets are used, between which the canvas is clamped. In this case, the teeth should protrude slightly above the surface.
A circular saw will require a pair of wooden blocks, self-tapping screws, a marker, a screwdriver, a jigsaw or a hacksaw, a ruler.
An industrially manufactured machine is used if the process is more complicated, for example, when sharpening chain, frame cutting surfaces or if there are several saws. A grindstone is used as a working tool.
Chainsaw attachments are used in conjunction with a special bar, which is used to sharpen while rotating. Sharpener, rhombic stone, circle, disc. these are the forms and types of sharpening tools.
Machine tools, in turn, are divided into electrical and mechanical, the latter are driven only by muscle power. The most sophisticated and expensive electrically driven options allow the operation to be carried out automatically, turning the grinder into a regular machine operator.
The first sign that a regular saw needs to be set and sharpened is to move away from the mowing line or to clamp it in the material. A sharp chain saw allows for effortless cuts, while high heat combined with too small chips signals the need for adjustments. Experienced technicians can determine the need for sharpening by changing the sound.
Circular saws also heat up, build up carbon deposits and become more difficult to move.
The chain saw dulls extremely quickly after hitting the ground. Its further use leads not only to an increase in muscle efforts, but also increases the load on the units of a gasoline or electric saw.
The chain may vibrate, fuel consumption will increase, and overall efficiency per unit of time will be significantly reduced. The size of the detached shavings will resemble flour.
The appearance of smoke during the operation of a circular or circular saw and heating of the protective casing, chips and irregularities along the edges of the cut indicate the need to sharpen.
Deformation of the teeth can be determined visually. Thus, the urgency of the operation will be indicated by a general decrease in labor productivity, a decrease in accuracy, a change in the nature of the sound, rounding of the tops of the teeth, the withdrawal of the tool from the mowing line of the cut and the use of large physical efforts.
An electric or gasoline chain saw uses the chain as a contact cutting surface. It is sharpened in workshops using industrial equipment or do it yourself using a template. In the latter case, round (cylindrical) files with a small diameter are used, which are selected depending on the marking of the sharpened product.
In particular, the Stihl MS brand chain from 180 to 250 will require a file with a diameter of 4 millimeters, for MS 290 and further up to 440, a tool with a diameter of 5.2 millimeters is needed.
The round file only moves forward and nothing else. Direction perpendicular to the chain plane. In addition, when sharpening chains, a flat file and a template are also used, after installing the template on the tooth, the cutting surface is sharpened.
Before starting work, the tire is clamped in a vice. However, the use of a machine in such a case is still preferable, although there are opposite opinions. If the wear is small, the matter can be corrected in manual mode, but we must not forget about the geometry of the cutting part.
With heavy wear, machine tools are necessary. Sophisticated equipment has a tuning system that allows it to work automatically.
How to sharpen a circular saw blade correctly
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.
It is not difficult to determine the need for a sharpening operation: 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.
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.
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.
Do it yourself sharpening 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.
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 file guide).
- 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.
- So each tooth is gradually sharpened, monitoring the condition of the bar and, when working out its surface, slightly shifting the plane.
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.
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.
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, scuffing of the fiber, 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.
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.
How to sharpen your circular saw blades, the easy way.
Sharpening circular saws
Materials and tools:
Circular saw blades.
- saw blade;
- diamond file;
- thin wooden blocks;
- 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 switching 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 care must be taken. Turning is performed 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 remaining 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.
Mechanized disc sharpening
Materials and tools:
- saw blade;
- disc sharpening machine;
- pendulum goniometer;
How to sharpen a circular saw in a mechanized way? There are many different machines. 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 front 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 simultaneously pressing the element against the circle.
After sharpening one element, the blade is removed from contact with the abrasive wheel, 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 handle this work if they follow all the instructions and rules for working with disc sharpening machines.
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 cutting, a heavy load must be applied;
- the edges of the cut burn;
- the engine overheats;
- smoke appears during operation.
Let’s go over the material how to sharpen a saw for wood or sharpen a circular saw.
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 at 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 unlikely to be 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.
Sharpening saws on wood
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 correctly 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.
How to Sharpen Circular Saw Blades. Trend Diamond Sharpening Tips
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 upwards, the operator must operate in such a way 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.
How to properly dilute and sharpen a circular disc
Features of Winning Discs
To sharpen the teeth, the cutting edge must be smoothed by 0.3 mm. For carbide-tipped discs, it is effective to use only diamond wheels installed on specialized equipment. A regular abrasive wheel will wear off faster than a craftsman will make at least one cutting edge.
When sharpening, a number of features are taken into account:
- the procedure is carried out not only on the front, but also on the back;
- start to sharpen from the leading edge;
- soldering should fit tightly to the diamond wheel;
- contact lasts no more than 5 seconds so that the metal does not overheat. otherwise, hardening occurs, which negatively affects the hardness.
The thickness of the metal to be ground should not exceed 0.15 mm; in this case, the sharpness of the cutting part can be restored many times. Negative teeth are much more difficult to sharpen at home.
Whether it is rational to sharpen such saws at home, everyone decides for himself. This is due to the high cost of diamond discs, the need to purchase special machines for sharpening. Therefore, a more profitable solution for many is to contact a specialized after-sales service company for the tool. PRAKTIKA sells circular saws and carbide-tipped saws, band saws, tools for forming holes, accessories, etc. We have affordable and a wide range of.
How to sharpen carbide saws?
Craftsmen often choose discs with increased wear resistance, due to special soldering from Pobedit. Pobedit is a generalized name for hard alloys T15K6, VK10, VK8, VK6, VK4, which contain 90% tungsten carbide, 9.5% cobalt. They have a hardness of 80-90 Rockwell units.
It helps to extend the service life, allows you to work with hard materials. The material is applied as a soldering, while the geometry of the teeth becomes more complex, as does the procedure for sharpening it. The restoration is carried out taking into account the exact exposure.
Sharpening on the machine and manually
The machine can be purchased or made by yourself. The simplest option is a sharpener or an emery machine, on which a diamond disc is installed. Another option is CBN or silicon carbide sputtered, but these are rarely found on the market. After that, the sharpened disk is fixedly fixed in the frame and the machine is turned on. It is dangerous to hold it in your hands, in addition, the efficiency of work decreases. the quality does not meet the standard.
With preliminary cleaning of the surface from carbon deposits using diesel fuel, kerosene, industrial cleaners, the recovery efficiency increases by 20-30%. Remember to follow safety precautions!
To sharpen it by hand, you need a file. The cutter is fixed motionlessly with a vice or a clamp, the first tooth is marked. You can use a flat and triangular file that fits freely in the interdental cavity. First, the back surface is sharpened, then the front and upper surfaces. At the same time, the size and angle of sharpening are constantly monitored.
In order not to face such difficulties, please contact our service center.