How to Determine the Circular Saw Sharpening Angle

how to sharpen a do-it-yourself angle grinder, machine, how to sharpen a circle at home

The use of circular saws is especially common in construction. Most of the work requires cutting and changing the shapes and sizes of finished materials. The circular saw helps to cope with such tasks quickly and get a quality result. But the instrument is not able to serve forever, sooner or later it may become dull. For this, it is necessary to know exactly how to sharpen the teeth for a saw in a domestic environment.

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 characteristics by which you can understand that the saw needs to be sharpened or replaced:

  1. Strong heating of the protective cover and the formation of smoke. The circular saw has a special casing that signals that the saw has become dull by heating. In especially difficult situations, smoke may appear from it.
  2. Sometimes the saw device involves mechanical feed (if you need to manually adjust the force of pressure). In such a situation, wear can be noticed if the pressure has to be intensified.
  3. If, when sawing wood, carbon deposits and a strong unpleasant odor are formed on the workpiece.

All the situations described above tell the user that it is time to sharpen the device.

Types of cutting teeth

On the surface of the teeth are four planes. the front, rear 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 tooth shapes:

  1. Straight tooth. Most often it is used only for an early longitudinal cut. During such work, quality and accuracy are practically not important.
  2. Oblique tooth. The back plane of such a part is tilted to the right or left. On the saws, these teeth often alternate, which is why they are called "variable-cut". Such teeth are most often 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 plates with double-sided lamination. This helps to avoid chipping material. The larger the beveled angle, the easier the saw passes through the surface. But this greatly increases the likelihood of tooth breakage. On some products, the teeth are tilted not only in the back, but also in the front.
  3. Trapezoidal tooth. The main advantage of this type is that the edge is dull slowly. But they are rarely used alone, usually alternated with straight teeth. During operation of the device, the trapezoidal teeth are located above the straight ones, therefore they undertake the main (rough) sawing work. Straight teeth finish. This design of the saw is used for sawing plastic, chipboard and MDF.
  4. Conical tooth. This type of tooth is considered optional, since it only helps to incise the lower part of the material (most often the laminate). This design allows you to protect the surface from chips and cracks. Conical teeth usually have a straight front face, but it can also be concave. This type is used for finishing cutting.

Important! Each type of tooth requires thorough processing when sharpening. You can not sharpen them at one angle.

Instruments

Do-it-yourself sharpening the saw is allowed only when using special devices. To do this, there is a grinding machine that helps to carry out the process on the machine, rather than manually. Then the result becomes more accurate.

In addition, other improvised devices are used for sharpening:

  • Mounting vice;
  • File;
  • A piece of wood.

Replace the listed devices will not work. If not even one of them is available, then sharpening will not work.

Grinding principles and angles

At the edges of the saw are four main sharpening angles. They, together with the shape of the tooth, can be the main operational characteristics of the tool. To describe each tooth are used:

  • Front and back corner.
  • Cutting angles of the front and rear surfaces.

These characteristics may depend on the type and weight of the circular saw, its purpose, and the density of the particular surface.

Sharpening angles on the scheme

Based on the parameters indicated above, all circulars can be divided into several types:

  1. For cutting longitudinal holes. When completing this task, you should use a front sharpening angle of 15 to 25 degrees.
  2. For transverse cutting. In this situation, the rake angle can vary from 5 to 10 degrees.
  3. Universal sharpening. To perform any operation, the saws are sharpened at an angle of 15 degrees.

The size of the sharpened angle is set not only from the direction of movement of the saw, it is also associated with the workpiece material. If you need to cut through very hard materials, you should choose the smallest angle. To work with softer products, the angle increases.

Important! If a carbide saw is used long enough, maximum wear can be seen on the upper cutting edge. A detailed examination of the tooth plane shows that the front surface of the material is most affected.

How to sharpen: basic methods

There are two available methods for sharpening circular saws. manual and with a machine. In order to sharpen the disc correctly at home, it is necessary to take into account some nuances.

Manual way

Special machines for sharpening the edges of the saw are rarely used in domestic conditions, because their cost is high. Therefore, in the absence of such a device, it is possible to cope with sharpening with improvised devices, such as an angle grinder. At the same time, it is forbidden to hold a circle in your hands without fixing it. Otherwise, it will not be possible to achieve a sufficient cutting angle for further work with the material.

To securely lock the circle in the correct position, use a flat stand.

  1. the surface of the stand coincides with the level of the axis of the grinding wheel;
  2. a gear wheel is placed on it so that the sharpening plane becomes perpendicular to the saw blade;
  3. the design of the device is complemented by a swivel joint.

The stand will help to comfortably position the saw blade for processing relative to abrasive material. Before starting work, a clear marking is carried out. For this, a color marker is used. They draw lines that will sharpen the element at the desired angle. A vise will help to securely fix the disk to the surface.

Video of sharpening a disk for a circular saw angle grinder:

Using a machine

When the master has access to a special grinding machine, the processing of elements occurs quickly and efficiently. This device is small, so it’s 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. For its selection, individual nuances are taken into account:

  • It’s best to buy a wheel made of diamond-coated elbor or green silicon carbide;
  • If a carbide blade is sharpened, problems may arise even when using the machine.

The very process of using the machine for sharpening is extremely simple. The operator should conveniently place the disk on the device and clamp it using a special lock. Before starting work, it is recommended to mark the first tooth with a marker. This will help not to get confused during grinding, and not to check the teeth that have already been processed. To select a sharpening angle, a special meter is provided on the device. The necessary angle should be set on it, after which the device will perform the task on its own.

A circular saw is a useful tool that can not be avoided during construction. It helps to make cuts in surfaces, as well as change their shape and size. For grinding discs use special machines or improvised materials. Doing it yourself is not so difficult, you must adhere to the recommendations listed and not be afraid.

Sharpening a disk with victorious soldering:

How to Sharpen a Circular Saw Angle Grinder

Sharpening wood saws do it yourself: geometry of corners, machines

During prolonged use, carbide tipped saw blades can lose their original qualities. But this does not mean that a new cutting tool should be purchased. In most cases, grinding can be done at home using any suitable machine.

Need for sharpening a saw

First you need to decide whether to sharpen or not. There are several obvious signs that indicate the relevance of this procedure. If you ignore them, then in the future the disk may become unrepairable and will cause the failure of an expensive machine.

How to Determine the Circular Saw Sharpening Angle

Video: How to Determine the Circular Saw Sharpening Angle


The advantage of using a soldered saw blade is its extended life. It is also intended for the processing of hard wood. Surfacing is made of steel 9HF, 50 HVA, 65G and similar compositions. They are characterized by high hardness, but at the same time, with significant operation, the probability of their breakdown will increase.

Timely sharpening of circular saws with a machine do it yourself performed with the following obvious signs:

  • increased engine load. The reason for this is the deterioration of sharpening and, as a result, the power unit needs more power for cutting wood. If protective relays are not provided in the engine design, its failure is possible;
  • deterioration in cut quality. The first sign is an increase in the width of the cut, as well as the formation of chips and bumps along its edges;
  • increase the processing time of the workpiece. For the formation of the cut takes more time than usual.

The best way is to periodically check the status of the soldered disk on the tree. To do this, temporarily leave the machine and dismantle the cutting tool. If its geometric parameters do not coincide with the initial ones, sharpening is necessary.

How to determine the angle of sharpening a circular saw

The best option would be to have the original template, according to which you can fix the geometry cutting edge. Often it is made of thin-walled stainless metal, less often. of thick cardboard.

Carbide teeth are made according to GOST 9769-79. But their geometry and geometric dimensions are determined by the manufacturer based on the purpose of the saw. If the template is missing, you must independently determine the required sharpening angles. To do this, it is recommended to use a pendulum goniometer.

Read the same

Template manufacturing technology do it yourself.

  1. Take a new soldered disk, which is completely identical to the dull one.
  2. Draw the exact contours on a solid sheet of cardboard.
  3. Using the pendulum protractor, determine the initial geometry of the carbide taps.
  4. Enter data on the template.

how sharpen carbide disc angle grinder

Sharpening carbide discs is very easy with the simplest tool, and such discs serve once.

How to Determine the Circular Saw Sharpening Angle

How to sharpen your saw blades yourself with a simple tool

Disc sharpener saws.

In the future, it can be used for self-sharpening on the machine or provided as a model for companies providing similar services.

In addition, it is recommended to compare the obtained data with the reference. In saws for longitudinal cutting rake angle usually equal to 15 °.25 °. For transverse models, this indicator ranges from 5 ° to 10 °. In universal models rake angle is 15 °.

It is important to remember that rake angle may be negative. Similar models are used for cutting plastic sheets and non-ferrous metals.

Methods for sharpening circular saws

To form a new cutting edge any grinding machine can be used. It is important to initially choose the right emery wheel and use it to sharpen the edge. For this it is necessary to use corundum or diamond models.

The best option is to use special equipment designed to perform this work. But due to its high cost, in many cases its acquisition is impractical. An alternative way is to use a grinding machine with the ability to change the angle of the corundum disk.

In no case can you sharpen manually yourself. Firstly, it will take a very long time. Secondly, the result will not meet the standards. If it is not possible to sharpen the saw blade on a tree, it is recommended that you use the services of specialized companies.

Professional sharpening circular saws do it yourself performed according to the following rules:

  • the main deformation occurs on the upper edge of the tooth. Rounding of the faces from 0.1 to 0.3 mm. It is from this place that it is necessary to begin processing;
  • sharpening is performed on the front and rear edges. This will provide the opportunity to repeat the procedure up to 25 times;
  • the amount of removal should not exceed the value of 0.05-0.15 mm;
  • The level of processing of the front and rear faces should be the same.

Read the same

After the sharpening of the discs on the tree is completed. it is recommended to bring it with fine-grained emery paper. This can be done manually or using a special machine.

Specialists advise using special corundum disks, the end surface of which has a groove of a special shape. It will facilitate the implementation of the procedure.

Ways to increase saw blade life

Process of forming a new cutting edge is time consuming and long. Therefore, it is recommended to fulfill a number of conditions to increase the life of the disk.

First of all, you should familiarize yourself with the manufacturer’s recommendations. They indicate the number of revolutions (maximum and minimum) for various types of processed materials. For metal, this parameter should be less than for wood.

Hard solders have a long service life. However, they often chip and break off. Alternative soft is practically not affected by such defects. But her service time is shorter than that of a solid one.

Roughness on the cutting surface is not allowed. In the future, they can lead to the appearance of chips and cracks.

The video shows an example of a machine for sharpening discs made do it yourself:

Drawings and tooth geometry

Sharpening of circular saws should be carried out clearly in compliance with the norms and requirements for the geometry of the teeth of each individual disk. To correctly sharpen circular saw do it yourself, you need to know the shape of the tooth and its geometry.

Read the same

How to Sharpen a Soldered Circular Saw

Do-it-yourself sharpening circular saws on wood: geometry of angles, machine tools

During long-term operation, carbide tipped saw blades can lose their initial properties. But this does not mean that a new cutting tool should be obtained. Almost always sharpening can be done at home using any suitable machine.

Need for sharpening a saw

To begin with, it should be determined whether it is necessary to sharpen or not. There are several obvious signs that indicate the relevance of this procedure. If you ignore them, then in the coming disk may become unrepairable and will serve as a prerequisite for the failure of an expensive machine.

The advantage of using a soldered saw blade is its extended life. How to sharpen a circular saw yourself. It is also designed to handle hard wood. Surfacing is made of steel 9HF, 50 HVA, 65G and similar compounds. They are distinguished by the highest hardness, but with all this, with significant operation, the possibility of their breakdown will increase.

Timely sharpening of circular saws with a machine do it yourself produced with the following obvious signs:

  • increased load on the engine. A prerequisite for this is the deterioration of sharpening and, as a result, the aggregate needs more power to cut wood. If protective relays are not provided in the motor design, it is likely to fail;
  • deterioration of cut properties. The first sign is an increase in the width of the cut, as well as the formation of chips and bumps along its edges;
  • increase the processing time of the workpiece. For the formation of the cut takes more time than usual.

The best method is to repeatedly check the status of the drive with soldered on wood. To do this, you will need to temporarily drop the machine and dismantle the cutting tool. If its geometric characteristics do not coincide with the original ones, sharpening is needed.

How to determine the angle of sharpening a circular saw

A good option would be to have an initial template, according to which you can adjust the geometry of the cutting edge. Often it is made of thin-walled stainless metal, less often. of thick cardboard.

Carbide teeth are made according to GOST 9769-79. How to grind a saw with your own hands. But their geometry and geometric dimensions are determined by the manufacturer based on the purpose of the saw. If the template is missing, you need to find the required sharpening angles without the help of others. To do this, it is recommended to use a pendulum goniometer.

DIY manufacturing template technology.

  1. Take a new soldered disk, which is completely identical to the dull one.
  2. Draw the exact contours on a solid sheet of cardboard.
  3. Using the pendulum protractor, determine the initial geometry of the carbide taps.
  4. Enter data on the template.

Sharpen circular saw with victorious surfacing part 1

how do i sharpen saw with winning surfacing I would really like for people who put dislike arguments

How to sharpen your saw blades yourself with a simple tool

Sharpening carbide discs is very easy with the simplest tool, and such discs serve once

In the future, it can be used for self-sharpening on the machine or provided as a model for companies providing similar services.

In addition, it is recommended to compare the obtained data with the reference. In saws for longitudinal shearing, the rake angle is usually 15 °.25 °. For transverse models, this indicator ranges from 5 ° to 10 °. In universal models rake angle is 15 °.

It is important to remember that the rake angle can be negative. Similar models are used for cutting plastic sheets and non-ferrous metals.

Methods for sharpening circular saws

To form a new cutting edge, you can use any grinding machine. It is important to initially choose the right emery wheel and use it to sharpen the edge. For this it is necessary to use corundum or diamond models.

The best option is to use special equipment designed to perform this work. You can grind a circular saw using a special machine, as well as using improvised tools. But due to its high cost, in many cases its acquisition is impractical. An alternative way is to use a grinding machine with the ability to change the angle of the corundum disk.

In no case can you sharpen manually yourself. Firstly, it will take a very long time. Secondly, the result will not meet the standards. If it is not possible to sharpen the saw blade on a tree, it is recommended that you use the services of specialized companies.

Do-it-yourself professional sharpening of circular saws is performed according to the following rules:

  • the main deformation occurs on the upper edge of the tooth. Rounding of the faces from 0.1 to 0.3 mm. It is from this place that it is necessary to begin processing;
  • sharpening is performed on the front and rear edges. This will provide the opportunity to repeat the procedure up to 25 times;
  • the amount of removal should not exceed the value of 0.05-0.15 mm;
  • The level of processing of the front and rear faces should be the same.

After the sharpening of the discs on the tree is completed. it is recommended to bring it with fine-grained emery paper. This can be done manually or using a special machine.

Specialists advise using special corundum disks, the end surface of which has a groove of a special shape. It will facilitate the implementation of the procedure.

Ways to increase saw blade life

Process of forming a new cutting edge is time consuming and long. Therefore, it is recommended to fulfill a number of conditions to increase the life of the disk.

First of all, you should familiarize yourself with the manufacturer’s recommendations. They indicate the number of revolutions (maximum and minimum) for various types of processed materials. For metal, this parameter should be less than for wood.

Hard solders have a long service life. Dear visitors of the site “homemade friend”, today we will consider a detailed step-by-step instruction on how to independently convert a circular saw into a stationary one. However, they often chip and break off. Alternative soft is practically not affected by such defects. But her service time is shorter than that of a solid one.

Roughness on the cutting surface is not allowed. In the future, they can lead to the appearance of chips and cracks.

The video shows an example of a do-it-yourself machine for sharpening disks:

Drawings and tooth geometry

Sharpening of circular saws should be carried out clearly in compliance with the norms and requirements for the geometry of the teeth of each individual disk. To sharpen correctly disk do it yourself, you need to know the shape of the tooth and its geometry.

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