How To Sharpen A Saw Chain Correctly

Chainsaw chain sharpening with your own hands Chainsaw chain sharpening with your own hands The chain tooth planes wood like a plane, and the thickness of the shavings is regulated by the height of the limiter. Intense sawing results in rapid dullness

Do-it-yourself chainsaw sharpening

The chain tooth planes the wood like a plane, and the chip thickness is adjusted by the height of the stop.

Intense sawing will quickly dull the chain. Several sharpenings may be required within one day. The problem is aggravated by the fact that the tooth quickly dulls when it meets the ground. It is enough to hook the soil with the tire once or twice, and the work can be stopped. The shavings become fine and the saw stops going deep into the wood.

The sooner dull teeth are sharpened, the less material needs to be removed during sharpening, as a result. The service life of the saw chain is longer. Determining the moment when sharpening is already required is quite simple. An important feature is the feed force. A properly sharpened chain is pulled into the cut with just a little pressure. If, on the contrary, the chainsaw is forced to cut by increased feed force, then the teeth are dull. A dull chain can also be recognized if only small chips fly out of the cut instead of coarse, thick chips.

In this situation, the chainsaw must be sharpened urgently. Do not cut with a dull or defective saw chain. The consequence is high stress in the body, high cyclic load, poor cutting results. In addition, this means reduced productivity, high fuel consumption and increased wear on all parts of the chainsaw.

Chain sharpeners

The round file holder has a mowing line that can be correctly positioned in relation to the chain. The holder fits onto the sharpened tooth in accordance with the line orientation. In this case, the insert itself rests on the upper edge of the tooth and the depth gauge, and the file is located under the cutting edge.

The use of a holder ensures that the file will fit to the tooth at the correct height. There are different holders for different pitches of the saw chain. The correct choice of holder, combined with the correct file diameter, ensures that the file protrudes over the back of the tooth by 1/5 of its diameter. Use only special saw chain files.

Before sharpening the chainsaw chain, it is advisable to secure the bar. When sharpening, it is necessary, keeping the position of the holder and pressing the file to the sharpened edge, to make several (2-3) turning movements away from you. Do not try to press too hard on the file, the movements should be smooth and measured. Rotate the file regularly to avoid one-sided wear. All other teeth are sharpened in the same way. It is more convenient to first sharpen the teeth in one direction, then change the position and do the same with the teeth in the other direction.

When sharpening all teeth, file the same number of strokes at the same pressure. This will result in the same tooth length. All cutting teeth must be of the same length. Different tooth lengths cause uneven chain running and cracking. If the length of the teeth is not the same, all cutting teeth must be filed to the length of the shortest tooth.

After several sharpening of the cutting teeth, the depth gauge is ground. To do this, a template is superimposed on it so that the limiter falls into the slot, and the tip protruding from the slot is grinded with a flat file.

The principle of using another set for sharpening chainsaws is no different from the first, although its design is different.

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A round file is also used for sharpening the cutting tooth, and for sharpening the depth gauge. Flat. A special template provides parameters for sharpening both cutting teeth and stops. In the first case, it is superimposed on the chain in such a way that it falls into its slots. The file, placed on the template and brought under the cutting edge, rests on the guide rollers. The direction of movement of the file must be parallel to the lateral edges of the template.

When sewing the stopper, the template is applied so that the stopper falls into the slot, near which it says SOFT (for soft wood) or HARD (for hard wood). As in the case of the first device, the file is seamed with smooth, even movements of the flat file away from you.

Chain teeth parameters

To achieve optimal cutting properties, the tooth blades are angled. The back of the tooth falling back at an angle forms the posterior angle of the upper blade. This angle is needed to cut the upper blade into the wood.

The backward tapering blade of the tooth forms the back angle of the end blade. This angle is needed for side cutting of the chips.

The edge of the end blade forms a rake angle with the sliding surface of the cutting link. The rake angles for different types of chains range from 60 to 85.

The back angle of the top blade refers to the backward tilt of the top blade.

This angle is measured relative to the sliding plane of the cutting link and, depending on the type of saw chain, ranges from 50 to 60. The upper blade is the main blade and the rear angle of the upper blade. This is the most important corner. The clearance angle of the upper blade is difficult to measure, and the correct value is obtained by observing other prescribed values.

The grinding or entering angle is obtained by measuring from the top cutting edge at right angles to the guide bar.

The sharpening angle can be changed, depending on the application. As a rule of thumb, the larger the sharpening angle, the higher the cutting performance when cutting non-frozen softwood. Reducing the sharpening angle when cutting frozen and / or hard wood contributes to a smoother saw blade and less vibration. However, sharpening angles greater than 35 and less than 25 should be avoided (except for rip chains, where this angle is 10).

The rake angle, sharpening angle and upper blade angle change during sharpening. These angles have a decisive influence on the cutting performance of the chain. Be sure to observe the prescribed values.

A depth gauge is located on each cutting link in front of the tooth blade. The difference in height between the top edge of the depth gauge and the front edge of the back of the tooth is defined as the distance of the depth gauge.

The depth of penetration of the upper blade into the wood (chip thickness) and thus productivity depends on the distance of the depth gauge. The distance of the depth gauge is set depending on the chain pitch and type of execution. Normally, it should be 0.5-0.8 mm, more often 0.6 mm. High values ​​will result in an increased tendency of the chainsaw to kickback, too much grip and chain vibration. Low values ​​lead to a drop in performance. Since the distance of the depth gauge decreases with each sharpening of the saw due to a decrease in the upper edge of the tooth, the depth gauge also needs to be filed periodically. After 5-10 chain sharpenings.

Do-it-yourself chainsaw sharpening

The chain tooth planes the wood like a plane, and the chip thickness is adjusted by the height of the stop.

Intense sawing will quickly dull the chain. Several sharpenings may be required within one day. The problem is aggravated by the fact that the tooth quickly dulls when it meets the ground. It is enough to hook the soil with the tire once or twice, and the work can be stopped. The shavings become fine and the saw stops going deep into the wood.

Read more:  How to Make a Smooth Start on a Face Saw

The sooner dull teeth are sharpened, the less material needs to be removed during sharpening, as a result. The service life of the saw chain is longer. Determining the moment when sharpening is already required is quite simple. An important feature is the feed force. A properly sharpened chain is pulled into the cut with just a little pressure. If, on the contrary, the chainsaw is forced to cut by increased feed force, then the teeth are dull. A dull chain can also be recognized if only small chips fly out of the cut instead of coarse, thick chips.

In this situation, the chainsaw must be sharpened urgently. Do not cut with a dull or defective saw chain. The consequence is high stress in the body, high cyclic load, poor cutting results. In addition, this means reduced productivity, high fuel consumption and increased wear on all parts of the chainsaw.

Chain sharpeners

The round file holder has a mowing line that can be correctly positioned in relation to the chain. The holder fits onto the sharpened tooth in accordance with the line orientation. In this case, the insert itself rests on the upper edge of the tooth and the depth gauge, and the file is located under the cutting edge.

The use of a holder ensures that the file will fit to the tooth at the correct height. There are different holders for different pitches of the saw chain. The correct choice of holder, combined with the correct file diameter, ensures that the file protrudes over the back of the tooth by 1/5 of its diameter. Use only special saw chain files.

Before sharpening the chainsaw chain, it is advisable to secure the bar. When sharpening, it is necessary, keeping the position of the holder and pressing the file to the sharpened edge, to make several (2-3) turning movements away from you. Do not try to press too hard on the file, the movements should be smooth and measured. Rotate the file regularly to avoid one-sided wear. All other teeth are sharpened in the same way. It is more convenient to first sharpen the teeth in one direction, then change the position and do the same with the teeth in the other direction.

When sharpening all teeth, file the same number of strokes at the same pressure. This will result in the same tooth length. All cutting teeth must be of the same length. Different tooth lengths cause uneven chain running and cracking. If the length of the teeth is not the same, all cutting teeth must be filed to the length of the shortest tooth.

After several sharpening of the cutting teeth, the depth gauge is ground. To do this, a template is superimposed on it so that the limiter falls into the slot, and the tip protruding from the slot is grinded with a flat file.

The principle of using another set for sharpening chainsaws is no different from the first, although its design is different.

A round file is also used for sharpening the cutting tooth, and for sharpening the depth gauge. Flat. A special template provides parameters for sharpening both cutting teeth and stops. In the first case, it is superimposed on the chain in such a way that it falls into its slots. The file, placed on the template and brought under the cutting edge, rests on the guide rollers. The direction of movement of the file must be parallel to the lateral edges of the template.

When sewing the stopper, the template is applied so that the stopper falls into the slot, near which it says SOFT (for soft wood) or HARD (for hard wood). As in the case of the first device, the file is seamed with smooth, even movements of the flat file away from you.

Hand tools

A set of tools required for sharpening saw teeth:

  • Flat file, which is taught to use in labor lessons at school. With it, the depth gauge is grinded.
  • A round file of a certain diameter, required for cutting a cutting tooth. It comes with an additional tool holder with fishing lines, which tell you how to properly hold the tool in relation to the chain. The holder is placed on the saw tooth, taking into account the guiding lines, the position of the file is under the cutting surface.
  • A template that serves for editing and observing parameters.
  • The hook is needed to remove sawdust from the chain.
Read more:  How to Saw Without Chips

Metal sharpening templates help you calculate the sharpening depth

How to sharpen a chainsaw chain: instructions for working with sharpening accessories

how to sharpen a saw chain correctly

A sharpened sharp chain is one of the conditions for the effective operation of a chainsaw. If the chain becomes dull, business in the country will stop: the bathhouse cannot be repaired, the fence cannot be built, and firewood cannot be prepared for the stove. For help, you can turn to paid specialists, but you should remember that this procedure will be repeated at regular intervals, and this is additional financial costs and a waste of personal time. Another way out is to find out how the chainsaw chain is sharpened independently, without the involvement of specialists.

Sharpening angle grinder

Professionals consider this work to be primitive. There is a risk of tire damage, and more.

Process (seemingly easy, but really difficult)

  1. The chain also stays on the bus;
  2. We attach a metal cutting disc with a thickness of 1.5-2 mm to an angle grinder. It is advisable to take not a new one, that is, with a worn edge;
  3. We put an obstacle in front of the chain and the tire (the chip will come off);
  4. We sharpen at the right angle;
  5. Upon completion of work, the chain must be properly tightened.

With a professional approach and a full hand, the number of sharpenings in this case can be more than 7.

For a beginner, it’s best not to experiment with a saw, chain, etc. With your body parts!

Advantages of the method: Fast, cheap and does not take away energy;

Disadvantages: You need special skills, a steady hand and the ability to comply with safety techniques.

Hand-operated machines

The design of such a machine is similar to a bow saw. Only where the saw blade is located is the round file. With such a machine, you can sharpen and straighten teeth, adjusting the proportionality of the upper edges to the smallest (control) size. The mechanism allows you to accurately set the parameters. After adjustment to the control tooth, sharpening is carried out in two or three movements. And then the transition to the next tooth.

When it is necessary to grind off the stopper, we change the round file to a flat one.

Advantages of the method: Allows you to sharpen teeth, including those that have lost their original shape, with high quality, convenient and without great physical costs.

Disadvantages: The price of the tool and the distance from the possible site of the saw operation.

What to choose for sharpening is up to you. This is due to how often you use your chainsaw. From the accuracy of handling it. From the quality of the purchased chain. And, of course, from the opportunity to spend a certain amount. Methods cannot be compared, because, as the German proverb says, apples must be compared with apples.

How to understand that the chain is dull

  • Increased physical effort;
  • Sagging (stretching) of the chain;
  • Vibration and retarding cutting passage;
  • Inaccurate sawing and change in the type of sawdust (they become uneven with sharp needle-like edges, small and dusty). This is already the answer to the test.

According to experts, and in my opinion too: well-sharpened teeth are more important than engine power.

Why dull? The reasons are generally known, but I will name the main ones:

  • Intense or voluminous work;
  • Accidental contact with stone, earth, hard knots, etc.;
  • Mishandling (broad term).