How to sharpen a circular saw correctly. Types of wiring the teeth of the circular saw

sharpen, circular, correctly, types, wiring

How to properly sharpen a circular saw disc and at what angle

Saw discs differ in the number of teeth and configuration. There are blades:

  • Monolithic or whole;
  • With hard spraying in the working area;
  • With attacked carbide plates;
  • Without teeth, such as continuous rim;
  • With wide and thin ledges;
  • With negative and positive front angles;
  • Universal discs.

Such a variety confuses when choosing the desired disk. We’ll figure out.

The number of teeth

Disks with fewer teeth make a rough cut. The advantage of a smaller amount is the high cutting speed. For construction work, there is enough 24-toothed disk diameter 180 mm. A thin blade with a slot is suitable for cutting deciduous rocks and pruning, where a clean edge is required. For a disc saw, 180-190 mm, a blade with 40 teeth or higher will provide a clean cutting.

The effectiveness of sawdust removal

Tooth position when it is directed down to the surface of the wood and forms a positive angle, leads to a quick, but rough sawing. There is a large gap and deepening between them, which contributes to the better cleaning of sawdust. The photo has a positive angle. The negative angle of the tooth cuts less aggressively, not so quickly removes less waste, but the cut is smoother. On the disk, the angle indicates: 5 Neg. 5 degrees negative, 10 POS. Positive 10 degrees.

Types of teeth in the shape and angle of sharpening

This distinctive factor of the saw disk is the angle of the teeth across or perpendicular to rotation of the blade. The higher the angle of the bevel, the cleaner and more even the cut. Some blades have very large bevel angles for cutting composite material, such as plastic or others subject to gap/chip when tooth exit. Bezes are flat (without angle), alternating, very alternating or with another configuration, which we will discuss below.


This is the width of the tooth at its widest point and, therefore, the width of the cut. If it is more than the thickness of the tooth, then the wiring is normal. Otherwise, the wiring is performed by experts using the following methods:

sharpen, circular, correctly, types, wiring
  • 1 through 2 teeth are diluted in the opposite direction;
  • Each tooth is alternately bred in different directions at the same distances from the plane of the disk;
  • Also, but distances with different deviations within 0.3- 0.7 mm.

Thin cut causes less resistance when cutting and therefore is better adapted for low.Power saws. Initially, thin discs vibrated or fluctuated, creating problems when cutting wood. The new technology of blades with a design that reduces vibration made some improvements to the segment of blades with a thin cut, which increased demand for users of wireless disk saws.

How to determine wear?

Checking a disco for wear is an important question that should be paid to special attention. Deep damage leads to the inability to sharpen a circle

There are three main features by which you can understand that the saw needs to be sharpened or replaced:

  • Strong heating of a protective casing and smoke formation. The circular saw has a special casing, which signals that the saw was dull by heating. In particularly difficult situations, smoke may appear from it.
  • Sometimes a saw device involves a mechanical feed (if you need to control the pressure force with your own hand). In such a situation, wear can be seen if the pressure has to strengthen.
  • If when sawing wood on the workpiece, a fog and a strong unpleasant smell form.
sharpen, circular, correctly, types, wiring

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

Principles and angles of tightening

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

These characteristics can depend on the type and weight of the circular saw, its purpose, as well as the density of a particular surface.

Sharpening angles in the diagram

Based on the parameters indicated above, you can divide all circulars into several types:

  • To cut through the longitudinal holes. When performing this task, the front angle of sharpening from 15 to 25 degrees should be used.
  • For transverse cutting. In this situation, the front angle can vary from 5 to 10 degrees.
  • Universal sharpening. To perform any operations, the saw is pulled at an angle of 15 degrees.

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


Doing a saw with your own hands is allowed only when using special devices. For this there is a sharpener that helps to carry out the process on the machine, and not manually. Then the result becomes more accurate.

In addition, other improvised devices are used for sharpening:

It will not work to replace the listed devices. If at least one of them is not available, then the sharpening will not work.

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And finally, several tips from specialists:

  • The more attentively the front part should be controlled;
  • When working with massive elements, the lateral planes are subjected to large loads;
  • Running along the radius of not more than 0.21 mm;
  • The teeth are most reasonable to process both in front and behind;
  • Metal removal parameters should not exceed 0.151 mm;
  • The disk is cleaned before starting work, you should also check all the corresponding angles;
  • Sharpening of teeth at the right angle requires practical experience, for lack of one it is better to take the disk to the workshop;

Circles on which there is diamond spraying should be cooled using a special coil liquid; The unit designed to sharpen disk knives is able to work with the workpiece in only one plane; It is impossible to allow the teeth to wear out until more than 0.21 mm, otherwise, it will be difficult to do normal sharpening; Typically, the disk has a resource of no more than 36 sharpening, while it does not matter which unit the processing takes place; It is important to ensure that the metal does not receive defects during processing (chips, cracks, zazubina), their appearance can provoke further destruction of the material.

About how to sharpen disk saws with carbide attacks. The next video.

Sharpening of circular saws with his own hands. The price of the issue and reliability of execution

Circular saw (modern name. Disk saw) is a much more effective tool in comparison with saber, longitudinal and chain. The quality of the saw and the convenience of work is not in doubt. With the help of a disc saw, you can perfectly smoothly cut the workpiece of a large area, produce cuts at different angles and work with a variety of materials.

The disk saw allows you to cut the material with the same accuracy and quality both along and across the fibers. Of course, you can get a clean cut, only with properly sharpened teeth. Circular saws are divided into three categories:

  • All.Metal
  • All.Metal with spraying solid materials in the working area
  • Saws with attacks of hard alloys

The presence of technological grooves on saw disks is very important

Any disk should be sharpened qualitatively, and the teeth are correctly divorced. The blunt teeth worsen the quality of the sawing, increase the load on the drive and do the work unsafe. In addition, on the disks designed to work with solid materials, technological grooves should be present. Otherwise, when heated, the canvas may be deformed from the expansion of the metal. This will lead to dangerous vibrations and a deterioration in the quality of the saw.


How to sharpen a disc saw!

Sharpening of a disc saw must be done on the front and rear faces! Below in the figure we showed a clove of a new saw (extreme on the left). In the process of cutting wood, the acute cutting face of the tooth is dull, and if we look at it under an increase of a few times, we will see that the front line has a rounded shape. To make it even, we need to polish one of the faces of the tooth: to hide this circle, and the edge will become sharp again.

To do this, we can grind it only on the front face of the tooth (which is not right) and we will have to grind a lot, or we can smash evenly the volume of grinding. Onto the front line of the tooth of the disc saw and on the back facet of the tooth of the disc saw. That is, to tighten the disc saw is recommended on the front and back of the tooth

As a result, we, when sharpening a disk saw on the front and back of the tooth, we can significantly increase the instural resource: we will be able to sharpen it more than times, which means it will work longer and beat off the funds invested in it when buying. And often, large.Diameters discs for multi.Pound and logs are very expensive, and such saws do not buy one at one thing.

It is very desirable to tighten the disc saw on a specialized embankment with CNC, which has high precision accuracy. Sharpening takes place in several stages:

  • First, it is necessary to clean the saw from wood resins, for which special illegal technical fluids are used (sodium alkalis).
  • Then the disc saw is pulled along the front line. The saw is pulled into several passages with a low grinding in one pass. The saw is pulled in 2-3 circles, this is determined by an experienced operator.
  • The third stage of the saw is pulled on the back of the tooth. Also for several passes.

We strongly recommend that the disk saws in specialized service centers that use CNC machines.

In this case, the operator can put on the control panel all the necessary angles of sharpening to the tooth of the disk saw:

  • Front line sharpening angle,
  • The angle of sharpening of the rear face, if the back line has a variable bevel, this can also be installed on the control panel.
  • Angles of trapezoid teeth and t.P.

High.Quality instrument sharpening is a disk saw resource. If you were able to provide high.Quality sharpening, the saw will not lose its original qualities, and will work as a new.

A simple way to sharpen a saw disk for a circular saw

Production process. Over time, the saw disc is blunting, and begins to leave the tan on the blanks. This is clearly demonstrated by the author, temporarily stopping the workpiece for a split second when performing the saw.

So, for sharpening, a diamond disk with a diameter of 150 mm and 150th grinding will be required. The master installs it instead of a saw disk, which will be hidden.

The first thing to take into account is the angle of inclination of carbide attacks relative to the radial line of the saw disk. On this particular disk it is 15 degrees. The master prepared a special conductor, on the reverse side of which he drilled and unscrewed the hole for the screw with a secret head.

On the front side of the conductor, he marked a fishing line for a trimmer, which should be a sharpening disc. The hole to which the saw disk will be attached to the side. So it turns out the required angle of 15 degrees.

It would seem that you can begin to get a hid, but it was not there. The cutting edge of the teeth is also tilted at an angle of 2.5 degrees, not perpendicular to the plane of the disk. In addition, this corner alternates on the “left” and “right” teeth. In order not to make a mistake, the author signs each of them.

Now you need to install a sharpening disk at an angle.2.5 degrees relative to vertical. So the left teeth will be hidden.

Sharpening a Ferguson circular saw for cutting firewood : part 2.

sharpen, circular, correctly, types, wiring

Now you can turn on the engine. The edge of the sharpening disk is brought to the attack, and the saw disk smoothly turns counting counterclockwise. So all the “left” teeth are hidden.

The master exactly repeats the processing of the workpiece, periodically stopping it. Even with a delay for a second and no more subfates were formed, and the surface of the workpiece is almost perfect.

I thank the author for the simple way to independently sharpen saw discs for the circular saw.

Taging sawing circles with carbide teeth

Winner attacks sharpen with a special machine or homemade device to a sharpener circle. The device is a lock in which the disk is clamped, observing certain angles of sharpening relative to the emery. The best for sharpening the winning is the diamond circle.

A marker is noted any point as a countless. Have the main working surface of the tooth to the sharpener so that they are in the same plane. Grind each tooth in turn before passing the whole circle. Rearrange the disk an auxiliary plane to the sharpening circle. Grind another plane in each tooth. So step by step there is a complete sharpening of discs with carbide attacks.

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