Sharpening circular saws with carbide teeth. How to sharpen a circular saw blade - step-by-step instructions

Circular saws are a tool that is used regularly in the woodworking and construction industries. A circular saw works with different materials, and the quality of the cut is of great importance. Sooner or later the question of restoring saw teeth arises. The ability to carry out this work at a high professional level will make it possible to use the cutting tool for a long time.

Necessity of the procedure

Circular saws are needed both in private households and in production. When building a house, creating furniture, cutting boards, timber - a similar tool is required everywhere. Properly sharpening a circular saw requires practical skill and knowledge.

Circular saws compare favorably with other cutting tools:

chain;
saber;
longitudinal.

Disc circular devices have significant productivity, and their service life is also much longer. Sharpening circular saws is an important necessary step; without it, the tool will not work fully. Thanks to various attachments with carbide tips, as well as pobedit coatings, cutting can be carried out with both wood and metals.

To sharpen discs with different attachments, special equipment is required. If the disk is treated “scientifically”, this will greatly extend its service life.

Timely sharpening of circular saws is carried out when there are several obvious signs.

The engine begins to experience unnecessary loads. The reason is simple - the teeth are dull and additional resources are required to process the material. There is a danger: if the disk is damaged, if there is no engine shutdown relay, the machine may fail.
If chips and chips form on the cut, and the cut itself becomes too wide, then this is a sure sign that the tool should be repaired.
A foreign smell of burnt material appears, and dark spots are visible on the cut line.
The time required to process a part increases.

Types of saws

If the disk is properly sharpened and the teeth are set according to the pattern, then it can process the workpiece in any direction relative to the wood fibers.

There are these types of tools:

saw with carbide blades;
discs made of solid metal;
discs with teeth treated with hard material;
discs with heavy-duty soldered teeth.

Hardwoods are processed with discs that have special grooves. Technological breaks prevent tool deformation and prevent it from overheating during the production cycle. Vibration and background noise are also significantly reduced, and the quality of the line formed by the cut is improved. The saw has teeth that are machined at a certain angle, each tooth has several cutting edges.

There is a main edge, additional ones are mated to it, and intersecting planes are formed:

The planes themselves also vary in different mates.

To use saws correctly and productively, you must consider the material you are working with.

The teeth can be straight, they are usually used for preliminary cutting of material. These teeth provide a low level cut. However, the productivity of such teeth is quite high.

Beveled teeth provide a more precise line and are suitable for cutting materials such as:

plywood;
PVC sheets;

The teeth ensure an even cut without the material crumbling.

There are also discs that have a bevel at the leading edge of the cutter, and also have a bevel at the trailing edge. Options for alternating different teeth with different bevels are possible. Such tricks ensure a clean cut, but you should remember: the denser the material, the faster such teeth become dull.

Trapezoid tooth– this tooth configuration ensures a long service life for the tool. Often a complex design is used, when trapezoidal and straight teeth alternate. The latter make the primary cut, which allows straight-shaped teeth to “polish” the cut.

Typically, such a tool is used in cutting laminate flooring, as well as PVC sheets.

Cone shaped tooth– such teeth are auxiliary and are designed to work with materials that have a laminated surface. They ensure correct cutting without the formation of any chips.

Teeth of this configuration are practically not used independently.

Sickle shaped tooth– in this case, the teeth are bent, which makes it possible to accurately cut the material across the wood fibers.

Determining the degree of wear and sharpening angle

Circular saws, sooner or later, lose their performance characteristics during operation; it is possible to effectively extend the service life of the tool if it is sharpened again correctly. This operation is simple; in many cases you can do the work yourself.

First of all, you should have an idea: what parameters the working disk of the unit has. The second most important parameter is the sharpening angle, what parameters the tooth itself has.

Before you start working, you should test the tool to understand how important it is to restore it. The disc should be inspected by removing it from the machine. An important indicator is the change in size, this can be seen even with a cursory examination.

Discs that are treated with special materials require a special approach. The tipped disc allows you to significantly increase the service life of the cutting tool. It can work with any type of wood, even material of increased hardness.

The “knobs” themselves are made of heavy-duty steel of the following grade:

50 HVA;

Some other grades of steel are also used.

To begin work, it is advisable to have the required template, according to which you can adjust the geometry of the cutting surface. Usually the template is made of tin or cardboard.

The teeth themselves have a standard prescribed in GOST 9768-78, however, each manufacturer has differentiation in inclination angles and shapes.

In the absence of a template, you will need to determine the parameters of the teeth yourself. There is a tool for this - a pendulum protractor. With this tool you can precisely set the sharpening angle.

Another option is take a new disk and use it as a template. You should take a sheet of thick cardboard and draw precise outlines on it with a pencil. Then, using a pendulum angle gauge, the exact configuration of the soldering should be established. This It is recommended to save the sample so you can work with it in the future, using as a reference.

After finishing the work, it will be necessary to test the resulting sample by comparing it with the standard. The angle of inclination in such saws ranges from 15 to 25 degrees.

If the model is transverse, then the differentiation can be from 5 to 10 degrees. If the model is universal, then the tilt angle is only 15 degrees.

Something to keep in mind when starting work: the rake angle may have a negative value. Similar models are used for working with PVC sheets, as well as soft metals.

Methods

You can sharpen the instrument yourself (if it does not have a pobedite coating) at home. And also in such cases, you can use a simple machine on which you can successfully sharpen any edges. It is very important to choose the right circle.

They come in the following types:

corundum;
diamond

It is best to use a unit in which the disc can be positioned at different angles.

There are rules:

the main defect occurs on the edge from above, that is, the edges are rounded within 0.11-0.31 mm - this is the starting point from which sharpening should begin;
Both the front and rear parts should be processed, this should be done at least 26 times;
size does not exceed 0.051-0.151 mm;
front and back edges are processed identically;
After the end of the cycle, the finishing process should be carried out, that is, clean the surface with “zero” sandpaper.

The work of creating a new configuration requires compliance with regulations and has its own complexity.

Familiarize yourself with the requirements, in particular, clarify the number of revolutions. It is clear that for metal this figure will be noticeably lower. Wooden elements are processed with a large number of revolutions.
The material from which the soldering is made can withstand heavy loads, its service life is significant, but even it sooner or later receives defects, chips and cracks appear.
A sure sign that the material is beginning to “tire” is the appearance of microburrs and roughness on the surface. Defects will appear in these places after some time.

To carry out sharpening correctly, you should know what types of teeth there are:

straight;
tooth with a bevel on the back;
trapezoidal;
cone-shaped;
concave.

How to sharpen:

The disc should be thoroughly cleaned using alcohol or chemicals;
all working planes are processed;
it is permissible to remove metal 0.051-0.151 millimeters;
sharpen perhaps no more than twenty-five times;
you can sharpen using a special file, if you have practical experience;
It is recommended to sharpen carbide teeth using separate equipment;
Victory tips can only be “taken” using a special machine that contains a diamond wheel.

Markers should be made to mark the starting point. The teeth are arranged in such a way that they are in a single plane. After completing the sharpening cycle, each tooth is tested and processed separately.

There are several types of tooth alignment.

Wavy, each tooth is straightened at a certain angle of inclination, thus creating a semblance of a wave.
Protective, two teeth have angles of inclination, the third tooth is present without inclination. This method is effective even when working with mahogany and oak.
Classic, when the teeth are variable - angles of inclination to the left and right.
Frontal.
Rear.
A tilt is made at the frontal plane.
A tilt is made at the rear plane.

There is another parameter - the sharpening angle, but it usually “works” as an additional tool.

For manual sharpening you will need:

wooden blocks (2 pieces, size 52x32 mm);
drill, screwdriver;
screwdriver bit;
a hacksaw for processing ceramics;
marker;
ruler;
screws or self-tapping screws.

The middle of the bars is cut out, they are fixed on a solid plane using self-tapping screws. A mark is made on the bars so that a crown for processing ceramics is then placed in the sawn markings, which, in turn, is attached to a screwdriver.

The surface of the stand coincides with the surface of the disc. The circle lies on a stand, the sharpening plane should be at an angle of 90 degrees to the saw blade. This simple device is equipped with a swivel unit. Such reliable fastening allows you to evenly process all the teeth of the tool. Using a marker, you make markings, which makes it possible to correctly determine the angle of inclination.

Machine tools

All equipment that provides sharpening has one operating principle. The only differences are in the performance of the equipment.

Household units can work for half an hour, then they should be disconnected from the network for a while. A professional tool is able to function almost without stopping for the entire shift (8-10 hours).

The tool kit includes an abrasive wheel and grinding material.

Using machines to sharpen teeth provides a number of advantages:

the ability to adhere to a given angle;
increases the efficiency of production operations and their speed;
It is possible to use a variety of disks.

Using the machine you can even work with hard alloy coatings. The grit of the grinding wheel varies. As an example, if the diameter is 126 mm, then the speed can be 2300 rpm.

The rotation speed of the disk can deviate within 510-720 rpm, it all depends on what fragility factor the disk has.

The harder the material, the greater the speed required to process it.

The functionality of the installation determines whether the workpiece or the spindle will move. Movement of the entire device is also possible.

The angle of inclination can be measured using a pendulum inclinometer; some units have a built-in scale to determine the angle of inclination of the teeth.

The teeth are usually sharpened first from the front, then from the rear.

To sharpen pobedite-tipped teeth, a diamond wheel is required. Discs that have soldering must be sharpened using special attachments or a diamond wheel coated with diamond.

when working with massive elements, the side planes are subject to heavy loads;
radius rounding no more than 0.21 mm;
It’s best to process the teeth both front and back;
metal removal parameters should not exceed 0.151 mm;
the disk is cleaned before starting work, all relevant corners should also be checked;
sharpening the teeth at the desired angle requires practical experience; in the absence of this, it is better to take the disc to a workshop;

wheels with diamond coating should be cooled using a special coolant;
a unit designed for sharpening circular knives is capable of working with a workpiece in only one plane;
the teeth should not be allowed to wear to the point of rounding by more than 0.21 mm, otherwise it will be difficult to do normal sharpening;

Among the tools that are used for working with wood, the circular saw is quite popular. Its design includes teeth made of hard alloy; it also uses steel plates that are soldered onto them. To create the plate, hard alloys are used, which ensures a cutting effect. But over time, the saw teeth are no longer able to perform their main function as effectively, which is why they require certain processing. You can prevent premature dulling of your saw teeth by using a circular saw sharpening machine.

Types of machines for sharpening circular saws

Speaking about equipment for sharpening circular saws, it should be noted that it covers quite a few types of machines, which include models of the simplest design, capable of performing the necessary operations manually, as well as automatic machine lines that can sharpen circular saws without human assistance.

The machines offered today can be classified into two large classes:

machines for household use;
machines for professionals.

Such a division is conditional. Moreover, the difference between these equipment lies only in productivity, which refers only to the time during which the sharpening equipment can operate in continuous mode. For models intended for home use, this figure is no more than 15-20 minutes. After this period of time, the user must give the machine time to rest. Professional models significantly superior to similar machines according to the parameter under consideration, since they are able to work for 8 hours, and to ensure effective work they need the same pause, which is enough to arrange only twice per work shift.

Today, each manufacturer has its own approach to the division of this equipment, on the basis of which the assortment is formed. Some focus on the design, others on the reliability margin, and there are those for whom the most important parameter is the demand for a certain brand of equipment.

The equipment in question also deserves special attention. Based on this parameter, machines can be classified into two groups:

having abrasive grinding wheels;
equipped with sanding belt.

The equipment with circles is most often used. As for the models that provide a sanding belt, then they are most widespread in industrial production. They allow not only to give circular saws the necessary cutting ability, but also to ensure the final grinding of saw blades.

Saw sharpening procedure

A variety of alloys can be used to create the serrated blades found on circular saws. All of them may differ from each other in characteristics, which are determined by the properties of the alloy, as well as its degree of grain size. Moreover, as the grain size decreases, the strength and hardness of the material used increases.

Also, circular saws may differ from each other in tooth sizes. Based on this feature, the following tooth shapes can be distinguished.

Straight teeth

Most often it can be found on saws that used for fast rip cutting, where special attention is not paid to the quality of the cut.

Beveled teeth

These are the teeth that are most often found on circular saws. Located on the saw, these teeth can differ from each other in the type of sharpening, which can be right or left. Working with such circular saws eliminates the formation of chips, the risk of which is especially high at the edges of the coating being cut.

Trapezoidal teeth

A tool equipped with such teeth demonstrates a long service life and does not require sharpening for a long time. These saws are characterized by the fact that trapezoidal teeth are used in conjunction with straight ones. Their location creates the opportunity for rough sawing with the help of trapezoidal teeth, and thanks to the presence of straight teeth, conditions arise for finishing cuts.

Bevel teeth

Saws that are equipped with cutters of this type can, in addition to performing their main task, also be used to cut the bottom layer of the board, as a result of which it is possible to prevent chipping on the top layer.

Homemade saw sharpening machine

Anyone can cope with the task of sharpening circular saws, for which they do not need to have special skills. The lack of special equipment will not be a serious obstacle, since if desired you can make such a machine with your own hands. The first thing you should know about when manufacturing such equipment is what elements it will consist of:

A do-it-yourself sharpening machine must have a device that would allow you to fix the saw in the required position in relation to the emery wheel. Due to this, it is possible to maintain the required tooth sharpening angles with high accuracy. This can be done using a stand, which will have to be installed on the machine frame in the same plane as the grinding wheel.

When the saw blade is placed on the stand, its tooth plane forms a right angle with the saw blade. In some cases, it is possible to manufacture this stand in a movable version. With this task you can easy enough to handle: a hinge is used to install one side of the surface, and the other part must be made in such a way that it is rigidly fixed at the edges, using bolts for this purpose. By creating a sharpening machine in this version, the user will have the opportunity to position circular saws at any angle and sharpen in any plane.

However, in the process of using such a sharpening device the user may encounter serious difficulty- he will have to make an effort to ensure that the sharpening angles are the same. To do this, the center of the saw must be secured in the required position relative to the grinding wheel. You can simplify the solution to this problem if you create a special groove on the stand, which will make it easier to adjust the saw.

When moving the mandrel with the wheel along the groove, there will be no serious problems with maintaining the required angle at which sharpening should be done. This problem can also be solved by another method. It is more attractive due to its less complexity. To do this, you need to create supports on the working surface with which the saw will be secured in the required position.

Basic rules for sharpening

In order to achieve the desired result in the process of sharpening circular saws, certain rules should be followed when performing this work:

Having at your disposal a homemade sharpening machine, you will be able to perform high-quality processing of the tool if you follow all the rules of this procedure. At the same time, your expenses will be much less than if you had decided to opt for factory devices. In addition to this, in order to use such a machine, you don't need any professional skills manual.

To sharpen a circular saw, you do not need to have a highly qualified specialist. There are no particular difficulties when caring for the machine. The main thing is to pay attention to the condition of the grinding wheel and regularly clean its surfaces from various contaminants that may occur during work.

To ensure that you are satisfied with the result of saw sharpening, you must adhere to the following simple rules:

make sure that the disk being sharpened is positioned in a certain way in relation to the grinding wheel: the optimal position is when the disk interacts with the wheel with its entire plane;
It is also important to prevent the blade from overheating to critical temperatures. This can be achieved by setting the appropriate rotation speed of the wheel, and it would be a good idea to pour water on the wheel before sharpening;
You can determine that sharpening helped achieve the desired result by the presence of a uniform burr on the entire edge. The procedure is completed to give the saw blade the necessary cutting ability by processing it with a grinding wheel.

Conclusion

A circular saw, like any other cutting tool, at a certain point begins to perform its task worse. In such cases, it becomes necessary to sharpen the tool. This problem can be solved most effectively using a sharpening machine. If you do not have such a device, then you can purchase it in a store or make it yourself.

However, regardless of the option you choose, you must remember that it is the tool sharpening technology that determines how well the circular saw will subsequently cut. Therefore, before you start processing using a circular saw sharpening machine, you should familiarize yourself with the rules of sharpening. This will help you avoid damaging the saw blade and achieve the desired result with less effort.

A circular saw is a device used to work with building materials. As a rule, wood is processed. A toothed disk is used as a cutting tool. Over time it becomes dull. Sharpening a circular saw blade is carried out both on a special machine and with your own hands at home.

Sharpening circular saw blades is required when the work becomes impossible. This can be understood by three signals:

Heating of the protective casing. Smoke appears from under it and leaves the cutting zone.
The need for additional effort when feeding the workpiece at the time of cutting.
When wood comes into contact with cutting metal, a burning sensation and smell appear.

Types of teeth

The main cutting element of the disc is the teeth. They are made from carbide material. A tooth consists of four sides: front, back and two sides. Also from the main cutting edge and two additional ones.

Teeth requiring sharpening are divided into:

Direct. Used for longitudinal sawing of blades.
Beveled. They have an angular cut on the back plane of the tooth. They can cut not only wood, but also plastic or chipboard.
Trapezoidal. In cross-section, the cutting plane has the shape of a trapezoid. Thanks to this, they can be sharpened less often.
Conical. They have the shape of a cone.

Sharpening angles

A circular saw has four corners, which after dulling must be sharpened. These are the front and back angles. Also the cutting angles formed by the front and back surfaces.

Depending on the direction of sawing, they are needed. When longitudinal cutting, the rake angle ranges from 15 to 25 degrees. In the case of cross cutting, the sharpening angle is reduced to 5-10 degrees. If universal cuts are required, then the tooth is sharpened at an angle of 15 degrees.

The density of the material has an important influence on the angle. The lower it is, the more urgently the tooth is needed. If the material being processed is plastic, then the angle can be negative.

Sharpening circular saws with pobedit tips

It is not easy to maintain sharpening angles for circular saws with carbide tips because pobedite is applied to the tooth. This alloy is attached by soldering. The geometry of the cutting part is complex, and the sharpening parameters require precise control.

Work is carried out by smoothing the cutting edge to a radius of 0.3 mm. A greater value should not be allowed.

Sharpening is carried out on the front and back planes of the tooth. If the work is carried out correctly, then the total number of sharpenings until the blade is completely worn out will be 30 times.
You should start working from the front plane.
The part of the tooth that is soldered should fit snugly to the .
Turning time ranges from 3 to 5 seconds. Can't go any longer. This leads to excessive heating of the metal. It is overheated and tempered with a decrease in hardness.
The thickness of the material being ground is around 0.15 m.

Application of the machine

The simplest machine for working at home is represented by It is a motor with abrasive. The wheels can be diamond, CBN or silicon carbide.

It is difficult to keep the blade in a certain position relative to the abrasive. You need to use the tools. This can be a horizontal stand or a fixing device, where the upper plane must coincide with the axis of the abrasive.

The tooth to be sharpened is located on the plane so as to be perpendicular to the blade. After turning on the engine, the blade is brought to the circle and pressed against it with a tooth. The layer of metal being removed is regulated by the pressing force. Having finished working with one tooth, the next one is approached using the same method. And so on in a circle until the end.

For the purpose of universalization, the stand is being modernized. The front part is made movable, and a pair of bolts are screwed into the rear. With their help you can adjust the tilt of the canvas. It becomes possible to sharpen the front and back planes of an oblique tooth.

The problem of maintaining the same front and rear sharpening angles remains. To do this, it is necessary to fix the blade relative to the center of the abrasive wheel. To do this, the disk is inserted into a special mandrel, and a groove is made in the stand for it. The required value is maintained by moving the mandrel along the groove. If the diameter of the disks is different, then it must be possible to move the engine or stand with a groove.

Another way is to install stops that will fix the desired position of the disk.

Sharpening by hand

In the absence of a machine, sharpening can be done with a file. To do this, it is important to clearly fix the disk. This is done using a vice. If you do not remove the canvas from the circular saw, you can do without them. Bars are inserted between the teeth, and the tool rests on a vertical plane.

A mark is made at any point on the circle with a marker. This will make it clear when the work is completed. Processing is carried out with a flat file that fits well between the teeth. The top edge of the tooth and its front face are subject to the greatest wear.

First, work is carried out on the rear surfaces of the teeth around the entire circle. At the second stage, they begin to sharpen the front edges. It is important to remember that the applied force must be the same, then all the teeth will be sharpened evenly.

It is possible to sharpen a circular saw disc at home. To do this, it is better to purchase a simple machine. In its absence, you can use a vice or homemade stops. After finishing work, check the tool. During the cutting process, its operation should be smooth and quiet.

Sharpening saw blades is necessary for any tool used for wood processing. It is carried out in the event of a decrease in the quality of the cut and requires compliance with basic rules, since the period of operation of the saw is also affected by the skill of sharpening.

Rules

Pliers can act as a bending tool, but in this case it is necessary to monitor the position of all teeth, otherwise the disc will be damaged and will not ensure proper processing of the wood.
During work, the holding bars must fit snugly against the disk, and the surface must remain in the same position.
In order for saw blades to be sharpened correctly, the position of the part must provide a clear view of all teeth.
As a rule, the main tool is a machine, but sometimes it becomes necessary to remove the disk and secure it in a vice.
Before changing the angle, a suitable tool is first prepared and marks are made.

Preparation

Before starting work, it is necessary to de-energize the tool, the part of which has lost its previous characteristics. The disk is tightly fixed using special bars, which are placed on both sides of it. Marks are placed on the blade for all teeth, and equal forces and an identical number of tool movements are applied in the process. This way you can produce high-quality, uniform processing of the disc.

The part is installed back after achieving the required appearance and checking the sharpening angles. Next, you need to make a test cut on the machine and verify the quality of the work performed. It is important that all the teeth are placed on the same plane, otherwise the movement of the block will be uneven, and the operation of the machine will be accompanied by characteristic noise. This is also possible if some teeth require adjustment.

Wiring

If you sharpen saw blades yourself, it is worth remembering about the spread of the edges, in which all the teeth gradually bend in different directions, but the distance between them remains the same. These actions can be performed using a special tool called a routing; it ensures a uniform bend in the middle part of all elements. After this procedure, the saw will move more freely, and the width of the cut will become larger.

Taking into account the fact that the cut is made not by the disk itself, but by its edges, which gradually remove layers of wood, it becomes clear that with an increase in the spread of the teeth, the likelihood of jamming decreases, and the cut becomes wider. It is worth noting that in this case, more effort has to be applied to operate the tool. In the absence of special devices, many people use it to spread the teeth, but this technique has many limitations and is not suitable for all saws.

The type of wiring is primarily influenced by the type of wood that will subsequently be processed. For example, to obtain an even cut without any imperfections or protrusions on soft rock, a large setting is required. It is desirable that the teeth deviate in the selected direction by 5-10 mm. Sharpening saw blades for wood is carried out only after setting, otherwise the teeth will be unsuitable for use due to the resulting deformation.

Angle selection

The purpose of the saw, that is, the type of suitable materials, determines the required sharpening angles. A relatively large value is used for rip sawing elements (within 25 degrees); for cross cutting saws this parameter is 5-10 degrees. The sharpening angle of universal type saw blades (used for longitudinal and cross cutting) is 15 degrees.

In addition to the cutting direction, the density of the material to be cut must also be taken into account. As the density decreases, the value of the front and back angle increases, that is, the tooth becomes more pointed. The rake angle parameter can also be negative; this is necessary for working with plastic and non-ferrous metal.

When do you need to sharpen saw blades?

To know when you need to start using a circular saw, you can choose a small part whose density and quality corresponds to the materials used for the work. Next you need to cut the block. The disc does not require processing if an even cut is formed, the saw moves easily and does not make noise during operation. In the opposite situation, you need to sharpen the disc at home or, if you don’t have a special tool, go to a workshop. It is worth noting that this process must be carried out in accordance with all rules and taking into account safety precautions. Before this, you need to decide on the required angle and shape of the teeth. There are also additional factors that indicate the need for sharpening:

during wood processing, a burning smell is felt and carbon deposits form on the cut itself;
the motor begins to overheat and contributes to the heating of the device casing;
Great effort is required to move the disk.

What you need to know

Sharpening of saw blades (St. Petersburg) today is carried out by many companies, but not all are able to provide high-quality results. The problem is that this process requires equipment with expensive tools and knowledge of all aspects and features of such painstaking processing. Craftsmen must have experience in this field and comply with all the nuances and stages of work. For example, the sharpening angle is affected not only by the tool used, but also by the disc itself, in particular by the material used as a basis during production.

Must have an angle corresponding to the types of surfaces used for work. The equipment can operate with values within 45 degrees. A special role is played by compliance with the established grinding angle, suitable for processing a particular material. Only by taking into account all recommendations and work rules can the service life of the cutting element be increased.

Sharpening carbide saw blades

The processing of such elements has several complex stages and is carried out on special equipment, which is a sharpening machine with expanded functionality. In particular, it must provide cooling of the treated area in the form of supply of a special composition and carry out work in automatic mode. Such equipment is usually equipped with a controller designed to detect the number of teeth and sharpen the disc itself with the selected number of cycles. The machines also have a magnet, which is necessary to secure the saw and prevent it from moving during processing. For sharpening, it is used on the surface of which diamond coating is applied. The machine for sharpening saw blades is, in addition, equipped with an electric motor to automatically move the saw and perform processing in the required area.

Equipment for processing saw blades coated with diamond chips

Such machines must have a design complemented by a cast reliable base. This ensures high precision processing of discs, which are made of materials with particular strength. They also have a high-tilt lock. The base is supplemented with special rubber elements that reduce vibrations, which can impair the quality of the work performed. Thanks to this addition, the noise level generated during processing is reduced. Adjustment on the equipment is made manually, while diamond-coated discs used for sharpening saws increase the quality of the result obtained and extend the life of the tool.

What to consider when processing

The operating principle of the sharpening disc has its own characteristics, as well as its structural design. The materials for its manufacture are based on nitrogen and boron compounds, which increase not only the accuracy of processing, but also the resistance to high temperatures that characterize the process itself. It must be taken into account that wheels have different diameters and are suitable for different tools and types of materials, so you need to carefully select the required model in accordance with the existing tool to be processed.

Peculiarities

Sharpening of saw blades in Moscow is carried out using various equipment. Processing can be carried out semi-automatically, that is, without human intervention; the task of the craftsmen is only to install parts on the machine and remove them. The most common type of equipment on which sharpening is done manually. It is easy to adjust thanks to the locking levers, and precise observance of the required sharpening angle is achieved using special clamps. The main feature is the linear feeding method. This ensures high-quality processing of both rear and front teeth. Thanks to the additional function of the machines, which consists in diagonal sharpening of edges, the operation of the saw is simplified and the quality of the resulting cut is improved. When choosing a disc for, first of all, you need to take into account the degree of grain. Fine-grain products provide minimal processing of the chains, while coarse-grain products remove a sufficient layer of material. The cost of such discs is directly affected by the popularity of the manufacturer, the quality of the base and the type of product.

A circular (circular) saw is an indispensable tool that you cannot do without when carrying out repair work, construction, woodworking or harvesting firewood.

The quality and accuracy of the cuts and the service life of the saw directly depend on the quality of its sharpening.

To sharpen the saw you will need:

File, vice, block of wood, marker, some time and good mood :)

Your mood will improve even more when you feel the difference between working with a dull saw and a well-sharpened saw.

Keeping the saw sharp is especially important for low-power circular saws. A dull disk increases the load on the electric motor, which, if overheated, can fail.
signs of wear on the saw, which are a signal that it needs to be sharpened:
- it is necessary to apply more force when sawing;
- the edges of the cut burn, a burning smell and dark marks on the material from the saw teeth appear;
- increased heating of the electric motor (smoke may appear).

Before sharpening, the saw teeth must be set apart. The setting of the teeth is done either by a special “setting” with a limiter, or by a metal plate with slots.
The circular saw is sharpened first from the back surface of the tooth, which during operation does not come into contact with the material being processed. Then the front surface, which runs into the material when sawing, is sharpened. You can sharpen the disc directly in the machine, or you can remove it for sharpening in a vice.
When sharpening in a machine, make sure that the machine is de-energized and will not start accidentally. Secure the blade by placing thin pieces of wood on both sides and pressing them against the saw teeth.
Mark with a marker (felt-tip pen) the tooth where you started sharpening. When sharpening the first tooth, remember the number of movements with the file and try to sharpen the remaining teeth with the same force and the same number of movements.
If you decide to remove the disk from the machine, clamp it in a vice using wooden dies and follow the steps described in paragraphs 3-6. As you sharpen the teeth, rotate the disc in a vice.
Once all the teeth have been sharpened, insert the disc into the machine, turn it on and cut a test block of wood. Loud noise, beating or uneven feeding of material indicates a difference in saw teeth in height. To check this, bring a marker to the cutting edge, and then turn the blade a full turn in the direction opposite to the direction of rotation. Examine the disk. A mark will remain on each tooth, which allows you to identify teeth that differ from others in height. Use a file to carefully reduce the height of the protruding teeth.
Of course, the best sharpening quality is achieved on special sharpening machines, but they may not always be available to a craftsman at home.

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