Sharpening the chain of a chainsaw with a file. How to understand that the chain has lost its sharpness

How to sharpen a chainsaw chain at home

Studying the information on how to adjust the chainsaw, be extremely careful, because the wrong settings. the first cause of rapid failure of the chain and abrasion of its teeth. The following are common causes of chain blunting:

  • Use of substandard oil or oil that does not meet the parameters specified in the manual;
  • Incorrect setting of the gaps between the lip and the stop;
  • Lack of lubrication in the system;
  • poor chain tension.

Also, be careful when sawing old boards because there are nails in them that also dull the sharpness of the teeth. Incorrect handling, frequent contact with hard objects like stones, bricks, heavy use are also considered to be important factors of element wear.

When is the time to sharpen the saw??

The time between two sharpening intervals depends on how often you use the tool. Some people use it every day and some use it a few times a year.

To understand that the teeth are blunt, you can tell by some of the signs that are detected during operation:

  • The chain is stretched and sags, in connection with what the saw blade does not work accurately and “slows down” in the saw cut. Working with such chain requires additional effort.
  • Sawing slows down, productivity drops, and you have to spend twice as much time on the job.
  • Sawdust changes its appearance: it becomes ragged, sharp, finer. Sharpened saw chips look different: equal pieces of straight, rectangular shape.

If the saw loses precision and gets stuck in the kerf it is time to have the chain teeth straightened

Repair work should not be put off for too long. The earlier you sharpen, the less material you have to sharpen, the longer the tool life. And you don’t have to work with a blunt tool for a long time, increase wear and waste your own strength.

Two samples of shavings: the first one is the result of sharpening with a sharpened saw, the second one is the result of blunting

Grinding a chain for chain saw with your own hands using an angle grinder

Specialists strongly recommend not using this method for inexperienced craftsmen. It is quite dangerous.

But if there is no other way out, you must observe the safety rules. the angle grinder must be placed in a vise and clamped securely. After turning the tool on, bring the edge to be sharpened to the rotating surface of the disc. Since it is impossible to maintain a constant sharpening angle with an angle grinder, the tooth sharpened in this way will differ significantly from the processed file. In addition, there is a risk that the angle grinder disc will not cut the eye of the tooth.

Chain sharpening with angle grinder

How to sharpen a chainsaw chain

Sharpening the chain of chain saws is a procedure that gardeners and professional woodcutters regularly face with. In this article, the master plumber will tell you how to restore the damaged teeth of the saw headset, and quickly return it to its previous working condition.

To understand how to properly sharpen a chain, you need to understand the basic principles of chain construction and operation. you cannot just sharpen the chain by eye, you need to know the basic characteristics of the chain and its components.

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The chainsaw chain consists of three types of links made of high-alloyed steel:

  • Cutters are the basic elements of the chain. A distinction is made between right-handed and left-handed, which are arranged alternately, with their cutting edges positioned above the plane of the bar. Tooth design includes cut depth limiter.
  • Drives (shanks): transmit torque from chain to chain through the drive sprocket. This feature extends the life of the sprocket and gives the chain a more stable hold on the bar.
  • Coupling. connects shanks and cutting teeth of the chain.

One of the chain’s main elements is the cutting tooth, which plunges into the wood and removes shavings. The tooth depth limiter determines the thickness of the wood chip and limits the depth of penetration into the wood.

Depending on the type of chain, the recommended settings relative to the limiter are 0.025″ (0.65 mm) or 0.030″ (0.75 mm).

Long life of any chainsaw depends on proper care and use, including the chainsaw. Good performance of the latter affects the performance of the device and performance parameters. Failure to sharpen in a timely manner can cause some problems with the saw itself. The most common is:

  • Crooked cuts;
  • High loads on the saw, resulting in increased wear of the parts of the device, and therefore a reduction in the service life of the entire device;
  • Increased fuel consumption.

If the saw produces fine, dusty chips, and the saw itself sinks into the cut with great force, it means that the target is blunt.

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There are other signs of a dull chain:

  • The speed of the tool has decreased;
  • Uneven and sharp sawdust is produced;
  • It is necessary to exert more effort to cut the wood;
  • The chain is stretched or sagging.

A chainsaw chain can quickly become blunt for the following reasons:

  • If you work with your chainsaw too often;
  • When the operator puts a lot of pressure on the saw while sawing;
  • If a chain is made of poor quality metal or if the steel is not properly heat-treated;
  • If you often cut wet or resinous wood;
  • When sawing hardwood trees such as: oak, birch Karelian, cherry, acacia, elm, ash and others;
  • If the chain encounters obstacles in the form of sand or stones;
  • If the chain is not properly sharpened or has insufficient tension during operation.

The design of all chain saws is similar, so the chain removal procedure will be the same:

  • Wear protective cotton gloves first, to avoid cuts by the cutting teeth.
  • Remove the protective sheeting from the chain saw and place it on a flat surface on its side.
  • Use a socket wrench of the required diameter to unscrew the fastening nuts that hold the body and guide bar, remove the top cover of the body.
  • Now slide the bar all the way down to the sprocket and loosen the chain and remove the working parts from the mounting bolts.
  • Disconnect the chain from the bar.

Sharpening with files

Files are a great option for a handheld tool that can be used to sharpen teeth.

When using them, it is important to remember to observe the sharpening angle of chainsaws chains.

But it is still right to start with another question. It concerns how to choose the right file for sharpening a chain from a chainsaw.

The selection of the tool decides to a large extent the quality of the work done. If you choose the wrong file, at best the performance of the teeth will drop even lower. In the worst case, you will damage the chain so badly that there is no way to repair it.

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To sharpen a chainsaw chain with a file, focus on the pitch of the chain teeth.

For them, accordingly, files of this diameter are suitable:

For comfortable work it is worth using tools 200 mm in size.

Sharpening technique

To correctly sharpen the chain from a chainsaw it is recommended to use a round and flat file.

Generally for the work should be prepared such a set:

Using a round file will be carried out processing of edges on saw teeth, which have a rounded shape. Basically take hand tools with a diameter of 4 to 5.5 millimeters.

A flat tool is needed to sharpen the depth limiters. The chain’s ability to cut or gouge into the material depends on these sharpening tools. Mostly wood. But chainsaws can also be used for cutting and sawing in other materials.

The very correct sharpening of a worn chain from a chainsaw involves carrying out the work without removing the element from the construction of the tool. The saw should be placed on a flat, horizontal surface. Make sure the brake is on beforehand.

before sharpening, carefully inspect the whole length of the chain. There may be cracks, chips, or fractures. Some defects turn out to be so serious that it is senseless to sharpen such a chain.

In the process of sharpening the chain teeth of a chainsaw, the following peculiarities of the technology should be taken into account:

  • The teeth should be sharpened from the inside out;
  • Degree of sharpening depends on the marks made by the manufacturer of the chain;
  • the tooth to be sharpened should be centered.

Such manual work always requires the use of heavy-duty protective gloves, as well as a mask and goggles. Otherwise you might cut yourself on the teeth or get hurt because of flying metal chips.

The craftsman can make it much easier for himself. But you need to buy a special holder designed for sharpening. But with its help, you can clearly choose the depth of the limiter and find the right angle for sharpening.

The right machine (with the accent on the I) is attached to the rail with clamps. Next, the guideways are angled and the sharpening degree is determined using the guideways.

Clamp the tooth to be sharpened with the stop. A file is placed on top of it.

Regardless of the fixture used, it is necessary to sharpen the edges first and only then align the depth stop.

Step by step process

The sharpening process, where the file plays the main role, is carried out in this sequence

  • the saw is fixed for better and more accurate machining;
  • holders are mounted, based on the readings of the scale;
  • the sharpening angle is determined by elevating the holder over the point by 1/5;
  • The bluntest teeth are used to determine the minimum dimension for grinding;
  • The machining is done with a circular file;
  • It is important to make smooth movements away from yourself;
  • 2 to 3 smooth strokes per tooth.

It is obligatory to turn the file upside down while sharpening. This is to avoid uneven draining.

It is also important to sharpen the teeth on both sides. Only after the first side has been sharpened can the chain saw be turned over.

A good solution is to install a template for the limiter. The indexing part is placed between the teeth. The protrusion formed over the template will need to be ground with a flat file.

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How to sharpen a chainsaw chain

With any sharpening method, it is important to know at what angle to sharpen the chain of the chainsaw. Several effective methods are used for quality chain saw sharpening at home:

Each of the methods is quite effective, will help to sharpen the teeth of the chain perfectly, and for a long time to extend the life of the electric or chain saw.

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Sharpening with a file is the easiest and most accessible method, but the most time consuming. It does not require an electrical network, you can perform the work in any environment. To sharpen the teeth it is recommended to use a round file with a fine and medium notch.

Not everyone knows what angle to sharpen a chainsaw chain on a machine. For quality sharpening of teeth the sharpening device needs to be turned by 180. 200 degrees. Such an angle is easy to provide with the use of an electric machine or equipment with a manual drive.

The popular way of sharpening the cutting part of the saw with an angle grinder has some difficulties. The tool blade can burst unexpectedly in the process and injure others.

Design of the saw

To better understand what a chainsaw is and how it works, it is desirable to know how it is designed.

By the way, it would be more correct to call the cutting tool of a chainsaw a saw chain.

The first saw chains were born at the beginning of the twentieth century. Designers didn’t rack their brains, they just assembled teeth on the chain that quickly lost their working capacity. They looked like the ones on handheld wood hacksaws. Sharpening such a chainsaw was very difficult. But it was not until 1947 that repeated attempts to develop the perfect saw chain were successful.

This chainsaw has an L-shaped cutter. Modern chains are in fact the direct ancestors of this development.

If during operation the cutting speed began to decrease, the chainsaw in the hands of the master begins to “walk”, then most likely, the saw chain has lost its operational properties, that is blunted and it is necessary to take measures to restore them.

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Hand sharpening technique

The choice of the diameter of a circular file is determined by the pitch of the saw chain The files with diameters of 4 and 5,2 mm correspond to 1,3 and 1,6 mm. A flat file is needed to reduce the height of the cutting link stops.

  • Any kind of chain holder that is included in the standard sharpening set is available. For stable filing angles use a simple template, template or special caliber.
  • Maximum excess of the file over the back of the tooth not exceeding 1/5 of its diameter.
  • To avoid one-sided wear it is recommended to rotate file periodically by 90 degrees, hold in relation to vertical plane by 90 degrees and 15-30 degrees. in horizontal plane.
  • It is desirable to use the same number of work passes to sharpen each link.

Many craftsmen at home prefer to work with the chain in a vise. No objection from the experts, provided the chain is not deformed.

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