The choice of gasoline saws is determined by several criteria. One of them is the pitch of the chainsaw chain. This parameter determines the capabilities of the equipment, the speed of sawing materials and must correspond to the engine power; only in this case will it be possible to extend the life of the tool and reduce the specific consumption of fuels and lubricants.

The concept of a step and its meaning

Chain pitch refers to the distance between any three rivets. In saw chains, this length characterizes the distance between the two cutting teeth relative to each other. The pitch size is also equal to the length between the vertices of two adjacent chain shanks (guide elements that fit into the groove of the bar). In order to correctly determine the pitch of a chainsaw chain, measure the distance between the axes of three rivets in a row.

There is a well-founded pattern that states that the greater the distance between the cutting teeth of the chain, the deeper they go into the material being cut. By increasing the pitch of the chainsaw chain, you can increase its performance. In this case, the force for rotating the drive sprocket changes accordingly. You need to understand that the higher the step, the more force must be applied to pull it while cutting the material and the greater the engine power must be.

Modern manufacturers of gasoline saws use three main types of sawing chains with the following pitch values, measured in inches:

• 0.325;
• 0.375 (marking 3/8 is used in classification);
• 0.404.

The quality and accuracy of the cut created in the material depends on the chain pitch. If the quality of cutting when working with a chainsaw is not of global importance, then the accuracy of the cut is sometimes important when dissolving logs or boards; for this, you need to take into account the dependence of the saw pitch on dissolving the wood according to given markings.

The rule for selecting a chain indicates that the pitch between the teeth is directly proportional to the performance and power reserve of the motor and inversely proportional to the accuracy of the cut being created.

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Correspondence between engine power and the distance between the cutting teeth of the chainsaw chain

Based on data obtained experimentally, it is recommended to select a chainsaw by considering the ratio of drive power and the distance between the cutting edges. It is known that the higher the pitch, the more force must be applied to rotate the drive sprocket and the greater must be the maximum torque developed by a gasoline engine.

To select the correct tool configuration, it is necessary to use the minimum power data for each of the three typical chain pitches.

Critical power indicators gasoline engines, rotating the drive:

• step 0.325” - power of at least 1.8 hp. (1.47 kW);
• step 3/8” - power of at least 3 hp. (2.21 kW);
• step 0.404” - power of at least 4.5 hp. (3.31 kW).

If the power of the driving motor is less than the specified values, then during the cutting process the following phenomena are possible: jamming of the chain in the tree, a decrease in the rotation speed of the drive, leading to overheating of the motor, increased cutting time and increased operating costs for fuel.

The use of powerful motors with a small pitch chain is not advisable, as this will also increase the time for dissolution and increase fuel costs. However, this combination is allowed if there is a need to perform precise work with wood.

The indicated minimum values ​​of the drive characteristics indicate the ability of the equipment to operate reliably, but do not indicate the time of its continuous use in a professional environment. Rather, these values ​​are given as recommendations for occasional work or for operating conditions where the tool is used for long periods of time. For long-term use of the equipment, which involves professional mode, the following technical data are required:

• step 0.325” - power 2.5 hp (1.84 kW);
• 3/8” pitch – 4 hp power. (2.94 kW);
• pitch 0.404” - power 6 hp. (4.41 kW).

The choice of tool should not be justified by the desire to have the highest possible chain pitch, as this entails the presence of a powerful motor, long tire, which significantly makes the saw heavier.

And if, for example, it will be used occasionally or for summer cottage work, then such a choice is inappropriate.

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Dependence of pitch on additional characteristics of saw chains

During the movement of the chain and cutting wood, very high loads are applied to it; therefore, an important characteristic is the thickness of the link element that fits into the groove of the bar and slides in it. This value also shows the thickness of the fastening elements of the links. You can measure it with an ordinary caliper.

Typical guide element thicknesses:

• 1.1 mm;
• 1.3 mm;
• 1.5 mm;
• 1.6 mm;
• 2.0 mm.

Thicknesses of 1.1 and 1.3 mm are used for the manufacture of chains entry level intended for minor work. Most often, the step length at these values ​​is 0.325”, which implies a gentle regime and low loads.

The value of 1.5 mm is the most common on the market of chainsaws and accessories; this value is enough to ensure safe work at 3/8" pitches. However, this value will always indicate that the chain is not intended for professional activities.

The guides, which have thicknesses of 1.6 and 2.0”, are designed to guide the most complex work, that is, they allow the use of equipment in shifts. At the same time, you need to know that these two values ​​are a certain classifier, indicating that the metal for the manufacture of these chains is smelted from special grades of steel, that is, increased strength is built into the structure.

All produced chains may differ in cutting depth. It is characterized by the height of the cutting tooth (profile). The height is measured between the top flange of the cutting edge and the stop (all on one segment). There are low profile and high profile chain products.

The higher the profile, the higher the entry into the wood and, accordingly, the cutting speed. The height of the profile affects the occurrence of vibrations, which can cause increased wear of the drive or difficulty holding the tool in the hands; the higher the cutting part, the stronger the vibrations will be. Also, a high-profile chain requires increased engine power.

Household chainsaws always have a low profile chain. Professional devices combine different options, but always adhere to the fact that if the chain has a large pitch, then its profile is low, and if the pitch is 0.325, the profile is high.

Such variations create the opportunity to increase the cutting speed not by increments, but by the profile height (cut depth). However, most professional tools for felling trees focus on increasing the pitch rather than the profile height, arguing that the chainsaw is more controllable in this version.

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Some important points when choosing chains or chainsaws

There are other indicators that influence the performance of the tool and the specifics of the work.

• geometry of the cutting tooth (profile);
• number of cutting links;
• type of sharpening of the cutting edge of the link.

There are two types of cutting profile: chisel and chipper. The first option has a straight working surface and is more productive. The second type has a sickle shape and reduced productivity. A chipper chain is easier to maintain, since it is easier to sharpen and strict adherence to sharpening angles is not required. Chisel options are most often used in 3/8 and 0.404” pitches.

The number of cutting teeth is always determined by their ratio to the number of guides included in the saw bar. That is, the link with the cutting part has two guide links. If such a combination is not observed, this means that the chain is of questionable manufacture.

The type of sharpening of cutting profiles is regulated by the type of future work. Typically, a classic chainsaw is used for cross cuts of wood and extremely rarely for longitudinal cuts. In rare cases, you come across chains with cutting links oriented for longitudinal cuts.

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When purchasing a tool, you need to clearly understand the scope of its use and, depending on this, determine the required chain pitch.

Chain links: a - cutting or cutter, b - lock.

Conditional types of use of chainsaws for private users:

• pruning branches in the garden, simple garden work;
• individual construction, firewood collection, occasional tree felling;
• frequent use (implying work for hire), procurement of very large volumes of firewood, operation in your own workshop.

In the first option, a chainsaw with a chain with a small pitch (0.325”) is recommended. This will allow you to get a lightweight and maneuverable tool, making it easy to trim branches, including climbing ladders and tree branches. This equipment makes it possible to carry out simple clearing of wood, and occasionally felling of small trees is allowed.

The second option involves choosing a saw with a 3/8” pitch and a guide link thickness of at least 1.5 mm. Such saws allow you to easily carry out the entire range of maintenance work on a site, a small workshop, and prepare a supply of firewood for the winter.

The third option suggests the use of 3/8 and 0.404” chains paired with a powerful motor, since the list of work performed is intended only for professional tools, and it is important to take into account the thickness of the guide link, it should be 1.6 or 2.0 mm. The steel for the manufacture of such chains is made taking into account possible overheating when dissolving wood without losing the hardness of the cutting edges of the links.

Interchangeability of chains is allowed only for the pitch size specified by the manufacturer. This is explained by the number of teeth of the drive sprocket, which is calculated only for a certain distance between the links. The chainsaw bar has a groove for a certain thickness of the guides; this should be taken into account when changing the chain.

Replacing the drive sprocket with a larger pitch is not recommended due to the mismatch between power and loads when dissolving wood. A weak motor will not develop required power for pulling cutting links through wood, which will lead to jamming or failure of the drive and clutch of the device.

The most versatile chain has a 3/8" pitch, which allows for versatility in combination with high speed cutting and a fairly accurate cut line, satisfactory breaking of wood fibers.

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To choose a chain for a chainsaw, you need to know three parameters:

1. Chain pitch;
2. Chain thickness (drive link thickness);
3. Chain length (number of drive links).

Knowing these three parameters, you can easily select a pole saw or harvester head.

1. Chain pitch

Chain pitch is usually denoted in inches; it is calculated as follows: measure the distance between the nearest drive links of the chain, or the distance between the three closest rivets of the chain (from the center of the rivet), divide by 2 and convert to inches (1 inch = 25.4 mm).

The chain pitch should always match the pitch of the saw drive sprocket and the driven one.

• Chain with a pitch of 0.25" aka 1/4". The distance between the three rivets (drive links) is 12.7 mm ÷ 2 = 6.35 mm, converted to inches (÷ 25.4) in inches this is 0.25" (more often referred to as 1/4").
• 0.325" pitch chain. The distance between the three rivets (drive links) is 16.5 mm ÷ 2 = 8.25 mm converted to inches (÷ 25.4) in inches this is 0.325".
• Chain with a pitch of 0.375" aka 3/8". The distance between the three rivets 19 mm ÷ 2 = 9.5 mm is converted into inches (÷ 25.4) in inches this is 0.375" (usually denoted as 3/8" so as not to be confused with 0.325").
• 0.404" pitch chain. The distance between the three rivets is 20.5 mm ÷ 2 = 10.25 mm, converted to inches (÷ 25.4) in inches this is 0.404".
• Chain with 3/4" pitch. The distance between the three rivets 38.1 mm ÷ 2 = 19.05 mm is converted into inches (÷ 25.4) in inches this is 0.75" (usually denoted as 3/4").

2. Thickness

Chain thickness is the thickness of the drive link (can be measured with a caliper). This size must always match the thickness of the groove.

In total, for electric and gasoline saws, as well as harvesters, there are 6 sizes that determine the thickness of the drive link:

• 1.1 mm (0.043”);
• 1.3 mm (0.05”);
• 1.5 mm (0.058”);
• 1.6 mm (0.063”);
• 2.0 mm (0.08”);
• 3.1 mm (0.122”).

3. The third main parameter when selecting a chain: Chain length (Number of drive links).

The length of the chain is determined by counting the number of drive (internal) chain links. Important:

• The cutting links do not determine the length of the chain (don't count them).
• The length of the guide bar does not determine the exact length of the chain (for example, on a saw with a 16" (40 cm) bar, a chain with a length of 55, or 56, or 57 links can be installed, depending on the chain tensioning mechanism of the particular saw model).
• A chain with a length of approximately 55-57 links will not suit you; only a certain size recommended by the saw manufacturer will do.

What is the bar length on my chainsaw?

The length of the cutting part of the tire differs from its total length. The length of the bar is usually considered to be the cutting length (working part) - this is the distance from the front of the saw to the rounded tip of the nose of the bar. This measurement is rounded to the nearest inches or centimeters. An inch is denoted as " equals 2.54 cm.

For example, the length of the cutting part of a tire for Stihl chainsaws MS180 – 40 cm. 40 cm ÷ 2.54 = 15.7 inches. Rounds to 16" (inches).

For the Shtil MS180 chainsaw, a 16-inch (40 centimeter) Oregon tire is suitable, article number 160SDEA074.

How to choose a tire for a chainsaw?

In some situations, owners of chainsaws may experience some confusion in understanding all the chain markings for these tools. As a result, this leads to unsuccessful purchases. The choice of chainsaws is often determined by just a few basic criteria, one of which is the chain pitch. This indicator helps to highlight the future capabilities of the tool, including its cutting speed, and according to standards it must correspond to the engine power level. How are chains marked? Let's figure it out!

Step and its dimensions

The pitch is the intermediate distance between three rivets that are located next to each other. To correctly calculate the chain pitch, you should measure the distance between the axes of three rivets placed close to each other. In formula form it looks like this:

Where, L is the step length, which in chainsaws characterizes the degree of distance between two teeth in relation to each other;

S – the value of the gap between the two outermost rivets out of three.

The pitch size can also be equal to the length of the distance between two adjacent shanks.

Pattern : the greater the distance between the cutting teeth, the deeper they will go into the material being cut

By increasing the chain pitch size, it becomes possible to increase the performance of the chainsaw. However, in such a case, the degree of force applied to achieve rotation changes. drive sprocket. And the higher the pitch of the chain, the greater the power of the engines and the more physical force required to pull it when sawing materials.

Chainsaw chain pitch. Table

Taking into account the step size, at the moment the chains are divided into several subtypes:

№	Distance between rivets	Chain pitch (width in inches)
1	6.35mm	1/4
2	8.25mm	0,325
3	9.3mm	3/8 (0,375)
4	10.26mm	0,404
5	19.05mm	3/4

As can be seen from the table, the chain pitch is designated as a regular number (3/4) and a decimal number – “0.375”. This division is caused by the similarity of the decimal values ​​- “0.325” and “0.375”, since the difference in one digit created confusion when selecting a saw. Therefore, at one time it was decided to establish two different notations: decimal and ordinary fractions.

The step is stamped into the area of ​​a special cutting depth limiter on each tooth.

The advantages of large pitch chains include:

• high level of productivity due to wide cut;
• ability to perform complex work (felling large trees).

But it should be noted that a wide cut requires the use of more powerful engine, which in turn significantly increases resistance.

The advantages of fine pitch chains are:

• low vibration level;
• smooth movements when cutting;
• cleanliness of the cut.

Advantages are achieved due to the large number of teeth and the small distance between them.

All known classification of circuits is based on the peculiarities of their marking depending on the pitch, which is intended for specific needs and is produced for a specific power of electrical equipment. To better understand each type of step, they should be considered separately.

Basic circuit parameters

Chain marking requires the following parameters:

1. Step:

• "0.325"– the most common and minimum step size, which is used in semi-professional and household chainsaws with low powers. The standard power value for such a step ranges from “0.325” to “3 hp,” but not higher than “3.5 hp.” When working with this type of chain, cutting occurs more smoothly, comfortably, without “breaking” the workpiece.
• "0.375" ("3/8")– applied to chainsaws with a power of “4 hp”. This chain is used when sawing wood of medium and small thickness.

The accuracy and quality of the cut created depends on the pitch value. In cases where it is not important to achieve high quality when working with a chainsaw, sometimes the accuracy of the cut is of particular importance. To do this, it is necessary to take into account the dependence of the step on the dissolution of wood according to pre-applied markings.

1. The thickness of the leading links (tails). When a chainsaw is operating, its chain bears the majority of all loads. Taking this into account, one more main characteristic The work of the saw is the thickness of the elements of the link that fits into the grooves of the bar. This parameter also determines the overall thickness of the fastening links, which is measured using a conventional caliper. Standard thickness values ​​include:

• "1.1 mm" ("0.043") and "1.3 mm" ("0.05")– used in the production of entry-level chains, which are intended for small amounts of work. Often, with such link thickness values, the chain pitch length can be “0.325”, which suggests the presence of high loads and gentle operating mode. Therefore, they are used in household and semi-professional devices;

• "1.5 mm" ("0.058")– the most common thickness value on the market for chainsaws and their accessories. This value can ensure safe operation with a step size of “3/8”. A 1.5mm thick chain is not intended for professional cutting;
• "1.6 mm" (0.063) and "2.0 mm" (0.08)– designed for the most difficult work. The metal used in the manufacture of such chains is steel of special grades, and the design includes characteristics of increased strength.

The greater the thickness of the link and the wider the groove of the bar, the higher quality the chainsaw is considered, since it can withstand heavy loads.

1. Cutting depth- is distinctive feature produced chains and is characterized by the profile height of the cutting teeth. It is measured by the gap between the stops and the cutting upper edge. Both high-profile (0.762 mm) and low-profile (0.635 mm) types of chain products can be presented on the market.

The higher the profile height, the higher the entry into the material (depth) and the cutting speed.

High-profile chains are installed on chainsaws with increased engine power. Information about the profile height is usually written down in the specifications for the tool.

The profile affects the occurrence of vibrations, which subsequently cause wear of the drive or problems when holding the tool in the hands. Moreover, the higher the cutting parts, the stronger the degree of vibration will be.

Household types of chainsaws are equipped with a low profile. Semi-professional devices can combine different types of circuits. However, in most cases the following principle is followed:

In a chain with a large pitch, a low profile is installed, and with a pitch of “0.325” - a high one

Such variations increase the cutting speed not due to the step, but due to changes in the depth or height of the profile. Although in professional tools the emphasis is on increasing the pitch, explaining this by the fact that the chainsaw becomes more controllable.

1. Geometry of cutting teeth– the profile can be of two main types:

• chipper (popularly “sickle”)– has a crescent shape and is characterized by high productivity. During operation, it is easier to sharpen and does not require strict sharpening angles. Disadvantage: risk of high loads and deterioration of cutting characteristics;
• chisel (popularly “seven”)– has a straight-shaped working surface in the form of the number “7”. Used in chains with a pitch of “0.404” or “3/8” on professional saws. The main disadvantage of chisel links is the difficulty of sharpening the cutting elements and sensitivity to dirt.

1. Number of cutting teeth– is defined as the ratio of the number of teeth to the number of guides in the tire. In chainsaws good production two guide links must be combined in the cutting part of the tool.
2. Type of sharpening of links– directly depends on the type of future work. Classic types of chainsaws are mostly used for cross-cutting trees and are rarely used for longitudinal cutting. Taking into account the resistance of the tree, in both cases the chains can use different angles of placement of links. On construction counters you can now find chains with the following types of cutting links:

• longitudinal type of chain - involves cutting wood along its grain. The cutting angle reaches 5-15 degrees.
• transverse type - the cut is made crosswise. The cutting angle in chains is 25-35 degrees.

1. Chain length – depends on the parameters and technical characteristics the chainsaw itself: power, dimensions, etc. With standard or normalized chain tension, its length is most often indicated in the passport.
2. The order of the links – the sequence of links may be different:

• standard - for each cutting link in the chain there are two driving links;
• with semi-pass - every third link in the chain is replaced by the so-called connecting link;
• with a gap - a connecting link is installed at the location of every second cutting link.

Why do you need to skip links in a chain? In the chains themselves, the most valuable thing is the quality of the cutting links, since they are manufactured using special technologies and are more expensive, unlike connecting links. If it is impossible to shorten the chain, the only option to reduce the cost of the chain is to skip cutting elements. In operation, chains with skipped links show reduced performance and wear out quickly.

In general, if you want to purchase a tool for cutting wood with maximum efficiency, take the time to further study the markings of chainsaws, which are also indicated in the instructions for the tool.

The chain is key element any chainsaw. The quality and speed of work when sawing wood depends on the type of cutting tool installed on the unit. For novice chainsaw users, choosing a saw chain seems like a complicated process, since you need to know what types of this part there are, its characteristics, etc. This article will cover the main factors to consider when choosing a good chainsaw chain.

Those who have dealt with sawing wood know that it can be sawed either along the grain or across it. Based on this, they issue different types chainsaw chains: for cross or longitudinal cutting wood In both cases, the difference in material resistance will be significantly different. For rip sawing the teeth are sharpened at an angle from 5 to 15°. Cross cut requires sharpening the tool at an angle of 25-35°. The figure below shows how the tooth sharpening angle is determined.

What type of saw element is can be found out from the markings on it; in addition, the sharpening angle is determined visually.

Chains for rip sawing are used extremely rarely, because it is much easier to unravel the workpiece on a circular machine. Due to low demand, manufacturers of this tool do not particularly improve it, and it is quite difficult to find a chain for rip sawing on sale. Most chainsaw buyers choose a tool with a cross-cut type, and it is the most popular among both professionals and home craftsmen. But, before choosing a chain for a chainsaw, you should study the main parameters that affect the performance and quality of the tool.

Existing step sizes

Chain pitch is a key parameter that requires special attention when choosing a cutting element for a chainsaw. It is measured in inches and is defined as the gap between the cutting links or the gap between the three rivets of the saw element. The following image clearly illustrates how chain pitch is determined.

Each saw has an individual chain pitch.

It is worth noting that the pro-class tool works with any type of circuit.

Chains with a certain pitch are always intended for units of a certain power, taking into account torque. Reducing the pitch not only reduces the performance of the device, but also reduces the load on the engine. Conversely, with a large step, the productivity of the device increases, but more power is required.

Moreover, there is such a thing as “aggressiveness” of the unit. IN in this case This means ease of control. The larger the step, the more force the teeth “tear” the wood. In addition, due to the large size of the cutting links, the width of the cut also increases, which means that the operator will need to make more effort to hold the device in his hands. Based on the above, it is not worth using a chain with a large pitch on a low-power unit, since this can render the device unusable.

0.325" pitch

This minimum value step, but nevertheless most common. Saw elements with this pitch are usually installed on amateur and semi-professional units that have low power - in the range of 3-3.5 hp. This is enough to easily cut branches, fell thin trees, perform small construction work. The 0.325-inch pitch chain operates smoothly, vibration-free, does not “rip” wood, does not overload the engine or fatigue the operator.

Pitch 0.375 or 3/8

The marking may look like decimal or ordinary. There is no difference between these notations: three divided by eight equals 0.375. Common fraction in the marking is intended to eliminate confusion between the numbers 0.375 and 0.325.

For this reason, there are times when it is difficult to find an element with a pitch of 0.375 inches on sale. If so, try looking for the same part marked 3/8.

These chains are installed on more powerful units - those with 4 hp. These saw elements can be used to cut down trees of medium diameter. Chains with a pitch of 3/8 inches are installed on semi-professional chainsaws and pro-class units.

Step 0.404

Saws with this pitch are installed only on professional units with a power of at least 5.5 hp. A saw with a pitch of 0.404 inches can cut down trees of any thickness, and the units for this cutting element have a large torque, which greatly facilitates human work.

It is important to know that the chain pitch always corresponds asterisk pitch, both slave and leader. It follows from this that if the documentation for the device indicates that it works with a chain with a pitch of 0.404, then you should not put a chain on a chainsaw with a pitch of 3/8. Before installing a chain with a different pitch, you must purchase complete set, including both the tire and both sprockets: driving and driven.

In addition to the above pitch values, there are two more: these are 1⁄4 (0.25) inches and 3⁄4 (0.75) inches. Saws with this pitch are not very popular among both professionals and home craftsmen.

Thickness of the leading link (tail)

This parameter is the second most important when choosing a saw element. You should know that different brands chainsaw tires will vary in width. The drive links are also designed only for a certain type of tire.

Leading links are following sizes.

1. 0.043” or 1.1 mm. This is the smallest leading link. It is usually installed in miniature circuits, which are intended for “weak” household units not intended for heavy loads.
2. 0.05” or 1.3 mm. Although the difference with the previous example is insignificant, the cutting element is designed for more noticeable loads. Chains with a 1.3 mm link are most common among owners of household and semi-professional chainsaws; they are light in weight and quite reliable.
3. 0.058” or 1.5 mm. This type saw is no less popular than the previous one, but is no longer used only in semi-professional tools, but also in pro-class devices.
4. 0.063” or 1.6 mm. Chains with such a tail thickness are more durable and are only used on tools for professionals.
5. 0.08” or 2 mm. This size is the final size among the types of drive links. The chain is designed for long-term operation and heavy loads. It is not difficult to guess that the element is used only on highly professional chainsaws with high power.

As a result, the greater the thickness of the drive link, the stronger and better the chain, and the greater the load it can withstand. But when choosing a cutting element, you need to check the instructions for the device, which indicate what size tire can be installed on it.

Cutting depth and profile height

The depth of cut depends on how high the chain profile is. The higher the profile, the more the chain “bites” into the material, and as a result, the performance of the tool increases. With a low profile, thinner chips are removed and the chain does not sink as deeply into the material. Typically, the depth is adjusted by grinding off the stops that are located on each cutter.

The following profile sizes are available:

• high profile - 0.03” (0.762 mm);
• low profile - 0.025” (0.635 mm).

This information can be found in the documentation that came with your chainsaw. These types of profiles are installed on amateur and professional units. But you should know that professional-class tools cannot always be equipped with high-profile chains, and household tools are always equipped with low-profile cutting elements.

High profile chains- these are the most productive elements, which means they have increased “aggressiveness” and, in addition, noticeable vibration. The latter significantly reduces labor productivity, as it does not allow working with the unit for a long time. Therefore, manufacturers found golden mean: with a large pitch, a chain with a low profile is made, and vice versa, if the pitch is smaller, then the profile is made high. These changes remove as much as possible everything side effects, the unit begins to work with less “aggressiveness” and normal performance.

It’s hard to say which profiles are better. When choosing, you should always focus on the expected working conditions, the hardness or viscosity of the wood, etc.

The cutting links have 2 types of profile.

Tire size

In addition to the thickness of the tire, which was mentioned above, when choosing a chainsaw, one more parameter should be taken into account - the length of the tire. It is measured in millimeters or inches. The following tire sizes are often used: 11″, 12″, 13″, 14″, 15″, 16″, 18″, 20″, 21″, 22″.

For simple work, for example, cutting branches, cutting thin boards, tires can be used small sizes- 11 or 13 inches. The chain on such tires accelerates to high speeds, which has a good effect on performance. The most universal tire sizes are considered to be in the range of 14-16 inches. In addition to using the unit as a lopper, a chainsaw can be used when preparing firewood (sawing thin logs). To saw thick log, install 18-22 inch tires. They are usually used on semi-professional and more powerful professional chainsaws.

No need to install the tire larger size, than indicated in the passport for the unit, since this will inevitably lead to an increase in the load on the engine and, as a result, its rapid wear.

Chain size

This parameter always depends on tire size installed on the unit. If you accidentally purchased a chain that is smaller than your tire, you will not be able to fit it. If this element is larger than the tire size, you will not be able to tension it. Both options prevent the use of inappropriate chain sizes. They are usually indicated in inches and have the following values: 10″, 12″, 13″, 14″, 15″, 16″, 18″ and above.

The chain length is determined by number of links. Links refer to the connecting links that fit into the groove of the bar, rather than the cutting teeth. When purchasing, you can indicate to the seller either the length of the part in inches or the number of links included in its composition. Some manufacturers, instead of length, indicate the number of links in the saw element. As a rule, this number does not depend in any way on the thickness of the tail, the pitch and the height of the profile. For example, a low-profile chain with a drive link thickness of 1.3 mm may consist of 72 links, 56 links, or some other number.

The order of the cutting links

In most cases, the order of placement of cutting elements can be of three types.

Cutting links are the main elements of the saw chain and have a high cost due to complex process manufacturing. Manufacturers, changing the order of cutting teeth, reduce their number and thereby reduce cost finished product. But at the same time, due to missing links, the efficiency of the tool is noticeably reduced, and the chain wears out faster.

Carbide chains

Pobedit is a very hard alloy, superior in strength to glass. Therefore, household glass cutters, various cutting metalworking and turning tools are made from pobedit, and it is also applied to saw chains of chainsaws. Pobedit is soldered onto the cutting links, where it acts as a strong cutting edge. But despite its hardness, this alloy is brittle.

The service life of chains tipped with Pobedite significantly exceeds the service life of standard cutting elements. Carbide chains are used for sawing frozen and hard wood, as well as in emergency situations where reinforced or regular concrete needs to be quickly cut.

The disadvantages of carbide chains include their high cost, which is several times higher than the price of conventional cutting elements.

Chains for chainsaws with pobedit tips are used very rarely in amateur practice, since they are intended for semi-professional and professional tools with good power and high torque.

The best brands of chainsaw chains

Based on reviews from owners of these units, a rating of chainsaw chains has been compiled. Below are the manufacturers producing best chains for chainsaws.

1. Stihl is a very famous Swiss brand that produces saw chains made of high-strength chromium-nickel steel. They do not stretch when heated like regular ones. This is achieved through the use of a special hot riveting method in production. In addition, this manufacturer has patented a lubrication method - “grooves”, which are supplied to all drive links.
2. The company does not design chains, but manufactures them using the best patented technologies. Thanks to this it is achieved high quality products. The company also provides a wide range of services to customers, providing warranty service for its products. In addition, the company's clients have the opportunity to purchase original spare parts for mechanisms.
3. Oregon is a division of Blount Inc. The company is considered one of the best among companies producing saw elements for chainsaws. Oregon also produces various accessories and spare parts for instruments of other well-known brands. The sawing elements of chainsaws are made of a special patented alloy, and a chromium alloy is applied to the teeth. To facilitate the sharpening process, marks are placed on the teeth indicating at what angle this operation must be performed. In addition, the chains have a system that reduces vibration and original design, thanks to which the lubricant is distributed evenly.
4. Carlton is a company from America. All chain elements from this manufacturer have increased hardness because they undergo shot blasting at the manufacturing stage. The cutting links have a long edge, making it possible to perform a large number of sharpenings.
5. Windsor. The company has patented a super-strong alloy that is highly heat-resistant and does not stretch. Windsor saw elements use stamped links and sealed rivets to ensure high reliability.
6. The chain is made of alloy steel with chrome-plated teeth. The latter are sharpened in a special way, and a hypoid lubricant is applied to the chain, facilitating the sawing process. The company also uses the shot-peening method in the manufacture of chains, which increases the strength of the links.

There are several main parameters by which a chainsaw is selected, one of them is the pitch of the saw set. The pitch depends on the power of the chainsaw, and significantly affects the cutting speed.

How much the step corresponds to the power determines the performance and service life of the chainsaw. Also, from him correct selection fuel consumption depends.

Pitch is half the distance between adjacent shanks or between three adjacent rivets.

There are several sizes, 1/4 inch is the smallest, 3/4 inch is the largest and 3/8 and 0.325 inch are the most popular.

Pitch is a parameter that is available not only for the headset, but also for the sprockets of the tire and chainsaw.

Important! All three elements, chain, sprocket and bar, must have the same pitch parameter, otherwise installation and correct work impossible.

What does the distance between teeth affect?

In a saw chain, the distance between the cutting teeth directly affects its performance. The more, the deeper cutting edge may cut into wood, provided correct sharpening limiter.

Accordingly, on more powerful chainsaws, it is permissible to install a headset with a large distance between adjacent links and vice versa.

If you install a ¼-inch saw set on a powerful chainsaw, the performance will drop significantly, and the load on the engine will increase, because. the saw will run too fast and exceed the maximum permissible speed, which can ultimately lead to overheating and scuffing of the CPG.

Conversely, installing a chain with a large pitch on a weak chainsaw will lead to the fact that the power of the saw will not be enough for normal cutting; of course, this will not lead to severe consequences, as in the first case, but working with such a tool is not comfortable.

Also, the quality and accuracy of the cut depends on the distance between the links. The further apart the adjacent cutting teeth are, the stronger the vibration during operation and the lower the cutting accuracy. For more precise cutting You should choose a saw set with a smaller pitch. This factor needs to be taken into account by those involved in figure skating.

The chain pitch has a great influence on the so-called “rebound”. The greater the distance between the teeth, the higher the likelihood that the chainsaw will kick back.

Important! Most often, “bounce” occurs when working with the tip of the tire, for example, when making internal cuts. In this case, you need to be extremely careful, regardless of what pitch the chain is used with.

When selecting a chain, the rule is that the pitch (the distance between the teeth) is proportional to the power, but the cutting accuracy is inversely related, i.e. The greater the distance, the lower the accuracy.

3/8 or 0.325 which is better and why

It is impossible to determine which parameter is better and which is worse, since each of them has its own characteristics and is intended for chain saws certain power. Depending on how correctly the saw set is selected, the performance of the tool will have different indicators. If the headset is selected optimally, i.e. the distance between the links corresponds to the recommended power, then the performance of the chainsaw will be maximum. At wrong choice, the engine will experience overloads that can lead to malfunctions.

Optimal power indicators for 0.325 inches are 1.8-2 kW. It is for this reason that the Husqvarna 142/137 chainsaw uses chains with this pitch.

For parameter 3/8, a tool with a power of up to 3 kW is required. In this case, the question arises: why are 3/8-inch chains used on the Shtil 180, with a power of 1.5 kW? The answer is simple: with Shtil chainsaws, power is not the most important thing, great value has maximum quantity rpm The Stihl 180 produces over 13,500 rpm, making it capable of sawing with 3/8-inch saws.

For 0.404 inches, the optimal power is 4.5 - 5 kW.

Important! Specified values power and chain pitch are not necessarily specific; the user himself has the right to choose the parameters of the headset that he plans to use on the chainsaw.

How to choose

When it is necessary to select the optimal chain pitch for a chainsaw, it is best to take into account the manufacturer’s recommendations and, based on them, select the type of saw attachment.

Important! When choosing, do not forget that the distance between the links is not the only parameter that you need to pay attention to.

It is also worth selecting the thickness of the link, the type of cutting tooth, and the number of links. Productivity largely depends on the sharpening angle, depth of cut and shape of the stopper tooth. The sharper the limiting tooth, the higher the cutting speed and the lower its quality.

Below we suggest watching a video about choosing a chainsaw chain pitch. The video explains and shows how to determine it, for which chainsaws, and what chain pitch to use.

How to find out

There are several ways to find out the chain pitch:

1. View the pitch value on the guide bar. Manufacturers of saw sets must indicate the length of the bar, the width of the groove and the pitch of the driven sprocket on the shank of the saw blade.
2. Measure the distance between the shanks of adjacent teeth or the centers of three adjacent rivets.
3. A method that is suitable for chains in original packaging is to look at the characteristics of the chain on the box.

The branded packaging of Stihl chains contains comprehensive information about the product, by reading which you can find out not only the distance between adjacent links, but also the type of teeth, link width, and recommended file size for sharpening.

Chainsaw chain table

At the end of the article, we suggest that you familiarize yourself with the table, which indicates technical parameters popular models of chains for chainsaws of different power.

Conclusion

The distance between the links of a chainsaw chain is one of the most important parameters that should never be neglected. When purchasing a spare set, you need to know which pitch is suitable for the bar and sprocket installed on your chainsaw, or change the chain, bar and drive sprocket as a set.