How the length of a chainsaw bar is measured

Cutting length

Even an inexperienced user will be able to distinguish between amateur, semi-professional and professional tools by their size, weight and tire length:

length, chainsaw, measured

The amateur tool or, as it is also called, the lopper is distinguished by its low weight, low (up to 2 kW) power and a short (11-13 ″) tire. It is ideal for garden maintenance jobs, but not at all suitable for long jobs and heavy loads.

The semi-professional chainsaw has average parameters and is equipped with a tire of average (14-16 ″) length. If necessary, such a tool can be used to cut a tree and cut a couple of boards. However, it is not suitable for continuous operation.

Professional tools designed for large volumes of work are characterized by a heavy chainsaw weight, high (up to 6 kW) power and a long (from 18 ″) tire. This configuration is suitable for many hours of cutting thick wood.

When looking for a tire, you should also remember that you need to choose a tire for the chainsaw no longer than the “native” one. Shorter options are permissible, but with those that are longer than the calculated ones, the engine spends more effort on accelerating the chain and heats up faster, respectively.

Prolonged operation of a chainsaw with a tire longer than specified by the manufacturer will inevitably lead to tool breakage.

Chainsaw tire: select and install the right option

Initially, it should be noted that the tire for the chainsaw is an element along the contour of which the chain continuously rotates. The devices are made of high quality steel, which allows you to extend the life of the product.

On the one hand, such products have holes for threaded fastening, and on the other, a driven sprocket is installed. This design of the product for chainsaws allows you to ensure the maximum smoothness of the chain, and also significantly reduces the load on the engine. Along the perimeter of the device there is a groove in which the tail of the chain moves. Special holes allow high temperature to be removed and chain lubricated to improve tool performance.

When choosing a tire for a chainsaw, it is important to pay attention to parameters such as the length of the product, as well as the manufacturer. Not only the quality of the product depends on the manufacturer, but also its cost. It is very important that the length of the bar is chosen such that it is indicated in the technical data sheet of the saw, but no more. After all, the use of devices of greater length will require not only the use of appropriate chains, but also affect the performance of the tool. Especially often the owners of household saws resort to such alterations, acquiring large tires for them, which allows them to cut large-diameter trees. At the same time, the resource of the tool and productivity are significantly reduced, which leads to the need for repairs.

Form also matters

Getting acquainted with the assortment or photos of chainsaw tires, it is difficult not to pay attention to the difference in their shapes. Narrow and flat tires are typical for low power tools. Their popularity is due to their safety for the inexperienced user: the absence of kickback prevents dangerous jumps of the saw and makes it more enjoyable to use.

There are also lightweight tires. The construction, consisting of two steel plates, bonded with polyamide, is ideal for tools intended for work at height, due to the reduced weight.

When choosing a tire for a chainsaw, it is important to understand that the quality of the work performed and the service life of the chainsaw depend on the correct choice. Therefore, you should give preference to tires from trusted manufacturers.

In addition, when choosing a tire for your tool, focus on the work ahead: conditions, your professional skills, the type of wood being processed. everything matters.

Other parameters

The paramount attention should be paid to the fastening of the chainsaw tire. If the shank of the selected tire is completely identical to the shank of your manufacturer’s tire, down to the location of the technological holes for the oil supply, such a tire will ideally match your tool.

Unfortunately, chainsaw manufacturers are trying to make branded shanks. A Makita tire, for example, will not fit a STIHL chainsaw due to the huge difference in shank construction.

No less important is the width of the tire groove, which can be in the range from 1.1 to 1.6 mm. The narrow groove is suitable for hobbyist tools, while the wide groove is designed for a less obedient but more powerful saw.

And finally, the end asterisk. It is the most subject to wear on any guide bar. If large volumes of work are planned, then it is best to select an option with replaceable heads, like on the tire of the Ural chainsaw. This design allows only the head to be changed as it wears out, significantly saving on the need for frequent tire changes.

Saw bar classification

The saw headset refers to the working elements of the chainsaw, which are created for a specific cut: chain and bar.

One of the factors influencing the choice of this or that model is the type of tire and its length. Chainsaw bars are classified as follows:

  • narrow flat. works in tandem with a low-profile chain of a non-professional household-level chainsaw, minimizes the risk of injury due to the practical absence of the “kickback” effect, which is especially important for newcomers to chainsaw;
  • lightweight. made of 2 iron plates connected by a polyamide layer. How to measure the length of a chainsaw bar? | 101. The cutting length of the guide bar of the chainsaw chain, the bar how to find out the length of the bar. Such a constructive implementation significantly reduces the total weight of the chainsaw itself, which can serve as a severe advantage when performing some kind of work;
  • tire with a replaceable head. installed on professional chainsaws of medium and high power, used for a huge amount of long work.

Tire type is a harsh trait, but not the only thing to consider when buying a chainsaw.

Chainsaw tire: choice, basic parameters

One of the main elements of the chainsaw is the bar, which serves as a guide for the movement of the chain during sawing. If, for some reason, this unit has become unusable, then the operation of the tool is significantly hampered or completely impossible. At the moment, there is a huge mass of problems with the chainsaw tire, according to which it is required to replace it.

How to choose a tire for your chainsaw

pila.prom.ua. spare parts, devices and equipment for forest and garden. Subscribe to our YouTube channel:.

Popular models

Professional saws from STIHL, ECHO and Husqvarna are reliable helpers and powerful. These tools use guides with a length of 50 cm to 75 cm with removable heads.

Before starting to work with the tool, check the saw headset. If you need lubrication of the chainsaw tire or minor repairs, then you need to do this.

Every part of the tool requires preventive inspection, lubrication and replacement if necessary. It can be concluded that the tire for chainsaws from STIHL, Husqvarna and other manufacturers is selected in accordance with the make and model of the tool. It must fit clearly with the saw chain for the tool to serve for a long time and reliably. If you do not follow the rules for operating the tool at low temperatures, then soon it will need repair.

Chain size

The 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 blade. The following image clearly illustrates how the chain pitch is determined.

Each saw has its own individual chain pitch.

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

Read more:  Carburetor Adjustment Stihl Chainsaw China

In addition, there is such a thing as the “aggressiveness” of the unit. In this case, we mean ease of management. The larger the step, the more force the teeth “tear” the wood. In addition, due to the large size of the cutting links, the kerf width also increases, which means that the operator will need to exert more effort to hold the device in his hands.

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. Tires of the following sizes are often used: 11 “, 12”, 13 “, 14”, 15 “, 16”, 18 “, 20”, 21 “, 22”.

For simple jobs such as delimbing, cutting thin boards, you can use the smaller 11 ”or 13” tires. The chain on such tires accelerates to high speeds, which has a good effect on performance. Tire sizes between 14-16 inches are considered the most versatile. In addition to using the unit as a delimber, the chainsaw can be used when harvesting firewood (sawing thin logs).

This parameter always depends on the tire size installed on the implement. If you accidentally buy a chain that is smaller than your bar, you won’t be able to put it on. If this element is larger than the size of the tire, you will not be able to tighten it. Both options prevent the use of inappropriate chain sizes. They are usually indicated in inches and have the following meanings: 10 “, 12”, 13 “, 14”, 15 “, 16”, 18 “and above.

The chain length is determined by the number of links. Links are connecting links that fit into the groove of the tire, not cutting teeth. When buying, you can specify to the seller either the length of the part in inches, or the number of links included in its composition. Some manufacturers, instead of the length, indicate exactly the number of links in the saw element.

It is worth knowing that the total length and the cutting length of the bar are different concepts. The cutting length of a chainsaw bar is measured by the distance between the tooth farthest from the sawtooth body and the body itself. This value is measured in whole inches.

Despite the fact that the length of tires from different manufacturers may be the same, the use of accessories from other companies on the tool is unacceptable. this can disrupt the correct chain movement and lead to injuries.

Saw bar classification

The saw headset refers to the working elements of the chainsaw, which are designed for direct cutting: the chain and the bar.

One of the factors influencing the choice of a particular model is the type of tire and its length. Chainsaw bars are classified as follows:

  • narrow flat. works in tandem with a low-profile chain of a non-professional household chainsaw, minimizes the risk of injury due to the practical absence of the “kickback” effect, which is especially important for newcomers to chainsaw;
  • lightweight. made of two steel plates connected by a polyamide layer. This design significantly reduces the total weight of the chainsaw itself, which can serve as a serious advantage when performing some kind of work;
  • Replaceable head tire. fits on medium to high power professional chainsaws used for large volumes of long-term work.

Tire type is a serious characteristic, but not the only one that must be considered when buying a chainsaw.

Causes of uneven cut

In amateur chainsaw practice, there are many questions related to the departure of the cut in one direction or another. Such a malfunction creates significant inconveniences when using a chainsaw in wood construction technologies.

The reason for this phenomenon is in the deformation of the tire that is hardly noticeable to the eye, improper sharpening or uneven wear of the cutting links of the chain. If professional fine-tuning of the chain did not give a positive result, the problem is eliminated by replacing the entire set.

Bus malfunctions

The tire itself and all the elements intended for its fastening are consumable parts. The tire wears out the most when the rules for operating the chainsaw are violated.

The main signs of tire damage are a decrease in chain tension, a decrease in the smoothness of its movement. The fastening of the chainsaw bar when the part is worn out cannot provide the correct cutting angle in relation to its body.

If during the use of a chainsaw such alarming symptoms appear, then it is necessary to urgently stop work and eliminate all malfunctions, since it is very dangerous to work with such a tool.

Consumer demand leaders

In the process of natural selection, the first lines of the sales ratings were taken by the products of the leading European and Asian manufacturers of chainsaw equipment. Maximum demand for components of STIHL, Husqvarna, Makita, and a number of others.

In all respects, the Oregon tire has proven itself excellently, which in various modifications complements the removable saw equipment of the middle and higher price levels.

Buying a tire is not easy

The information field contains signs by which it is easy to distinguish the original branded chainsaw from the most reliable fake. As for tires, their advantages and disadvantages are manifested directly in operation.

In the domestic market of household appliances, about 15% of the total sales of chainsaw components are of unknown origin, third-rate counterfeit, which develops a standard resource at best by half.

It is economically unprofitable and unsafe to operate a chainsaw complete with a fake tire and chain. A significant part of traumatic situations is created when using tire and chain counterfeit.

When buying a tire different from the original model, chances are high that the old chain with the new tire will not fit together in any way. Ideal: try on all three key components. the tire / chain pair and, in fact, the gasoline tool itself. A slight difference, sometimes not even noticeable to the eye, in just one link can be critical for the entire assembly: the chain will either not wear at all, or it will sag.

The next point: different chainsaws are designed for different widths of tire grooves, respectively, and the drive links are designed for use with different tires. The wide grooves of the chainsaw are designed for a heavy-duty chain that is of high quality and efficiency. When choosing a chain, it is important to check the possible width for a given model of chainsaw.

Selection rules

Tires from an expensive brand are guaranteed to last much longer than products from an unknown company. Expensive products are made of good quality steel, which guarantees good wear resistance and a minimal chance of getting a defective tire.

It is necessary to take full responsibility for the choice of accessories for chainsaws, since low-quality parts can lead to both breakage of the tool and injury to the employee.

If you are buying guide bars for the first time on your own, then in addition to measuring the cutting length, you need to take a photo of the tire for the chainsaw, which was installed before. this will help the consultants to choose the right product.

The cutting length of the bar differs from its total length. The length of the bar is considered to be the length of the cut (working part). this is the distance from the front of the saw to the rounded tip of the nose of the bar. This dimension is rounded to the nearest inch or centimeter. An inch is indicated as “equals 2.54 cm.

For example, the cutting length of a bar for a STIHL MS180 chainsaw is 40 cm. 40 cm ÷ 2.54 = 15.7 inches. Rounding to 16 ″ (inches). For the STIHL MS180 chainsaw fits a 16 inch (40 cm) tire Oregon part number 160SDEA074

The amateur tool or, as it is also called, the lopper is distinguished by its low weight, low (up to 2 kW) power and a short (11-13 ″) tire. It is ideal for garden maintenance jobs, but not at all suitable for long jobs and heavy loads.

The semi-professional chainsaw has average parameters and is equipped with a tire of average (14-16 ″) length. If necessary, such a tool can be used to cut a tree and cut a couple of boards. However, it is not suitable for continuous operation.

When looking for a tire, you should also remember that you need to choose a tire for the chainsaw no longer than the “native” one. Shorter options are permissible, but with those that are longer than the calculated ones, the engine spends more effort on accelerating the chain and heats up faster, respectively.

Prolonged operation of a chainsaw with a tire longer than specified by the manufacturer will inevitably lead to tool breakage.

Read more:  What oil can be used for the chainsaw chain

The nominal or cutting length of the chainsaw bar is slightly different from the total. Cutting is defined as the distance between the saw body and the tip of the tooth farthest from it. The length is rounded to the nearest inch and is the number by which the guide is selected for each tool model and for a specific chain. Numbers may differ from manufacturer to manufacturer, so a tire for a Husqvarna chainsaw may not be suitable as a replacement for a Partner saw.

The guide groove of the bar of a household chainsaw, has a width of 1.1 or 1.3 mm. The same figure for professional models is 1.5-1.6 mm. The discrepancy between the thickness of the chain shank and the width of the groove can initiate overheating of the headset and its premature failure. Alternatively, the chain may exit the groove or break.

How to measure a chainsaw guide bar

Similar consequences can occur if the pitch of the chain and the crown of the drive mechanism does not match. In many models of chainsaws, replacing the drive sprocket is associated with time-consuming dismantling of the clutch assembly. In some cases, equipment of a service and repair level is required.

The most demanded sprocket and saw chain pitch for saws up to 3 HP 0.325 in. For professional chainsaw equipment, the use of a 3/8 inch pitch is characteristic.

The driven tire sprocket is not centrally lubricated. This disadvantage is compensated by the high quality of the bearing, which must be smeared every 8-10 hours of operation. Full replacement of the driven tire sprocket is possible only in an equipped workshop.

Tires standardized in fit dimensions are presented in a small assortment. As a rule, each manufacturer uses its own standards, which excludes the possibility of operating a chainsaw with saw equipment of other brands.

  • The selling price of guide rails is determined by dimensions, material quality and brand awareness. The most expensive, highest quality and most durable products from leading manufacturers.
  • The high cost of branded tires is fully compensated for by the high wear resistance and long service life.
  • In the middle price range, there is an assortment of budget-level tires, which are used for household-grade petrol and electric saws. With proper operation and qualified maintenance, tires of the Standard category develop the resource specified by the manufacturer with a large excess.

Less popular are cheap, short-lived Chinese-made tires, which are installed on chainsaws of the lowest price range. A significant part of such products goes on sale under the trademarks of well-known brands.

The length of the new guide rail is determined by the power and torque coefficient of the power unit.

  • Chainsaw models of small and medium power range are equipped with tires from 30 to 40 cm in length.
  • Longer saw sets create excessive loads on the engine and tool kinematics, which negatively affect its traction characteristics and durability.
  • The enclosed application manual contains the recommended guide bar length. This means that the installation of a shorter headset is not excluded, but there are a number of restrictions on the operation of the tool with a bus of increased length.

Professional-grade chainsaw technology is equipped with powertrains, the power of which allows you to take advantage of the advantages of tires up to 75 cm long.Often the size of the tire in centimeters and inches is applied to its side plane.

The fact that not least of all catches the eye when choosing chainsaws is the size of the tires: it depends on them how large the size of the logs can be cut.

The length of the chainsaw bar is one of the most important parameters affecting the convenience, speed and safety of work. This characteristic must be consistent with the operating power of the chainsaw engine, which is why any serious manufacturer indicates the recommended tire length parameter in the technical data sheet of its products.

What is the risk of ill-considered use of tires that are too long or too short? You should start with the fact that you cannot strictly exceed the tire size recommended by the manufacturer of the chainsaw. The smaller size is reasonably acceptable, but also not recommended: there is a perception that a short chain provides less stress on the tool, but remember that this can cause serious damage to the saw headset. The permissible deviation range must be specified by the manufacturer in the technical documentation attached to the saw.

Long chainsaw bars provide greater comfort when working with large material in volume, for example, when making deep cuts in thick logs. However, the use of a long tire paired with a low-power unit will give one disappointment: the engine power will not be enough to rotate the crankshaft, which means that fast cutting will be simply impossible. The sawing process will be slow, gas consumption will be increased, the engine will wear out instantly.

A shorter bar length with the right tool power will provide a high cutting speed and will be optimal for use when working with small trees or planks.

Like other construction tools, chainsaws are divided into professional, semi-professional, home models. Household units have less power and, as a rule, productivity. In order to choose the best chainsaw for your home, you need to remember that the frequency of its use will vary from half an hour to 50 minutes a day.

The power of home saws often does not exceed 2 kW, which is quite enough for delimbing, logging or erecting a fence. Vibration is reduced due to the small distance from the edge of the tines to the depth of cut. The downside of the “coin” of reducing vibration levels is low productivity.

The power of semi-professional chainsaws ranges from 3000 to 5000 watts. With a similar tool, you can already safely saw a log house at home, perform complex work on felling wood. The frequency of use of middle-class models is from 5 to 8 hours a day, depending on the brand. According to experts, semi-professional saws are the best option for building a summer house, a bathhouse, and felling wood.

The most productive, reliable and unpretentious in work are professional chainsaws, the power of which reaches 6000 watts. Such tools are designed for maximum daily workload. Thanks to the increased performance and extended bar length, the best chainsaws in this category can easily handle trees up to 40 cm in diameter.

How to measure the length of a chainsaw bar

The correct choice of the guide depends on the knowledge of specific indicators that reflect the design features of the part. The most important and ambiguous parameters include the length of the chainsaw tire, which is measured in two ways.

The fastest, but not very accurate option comes down to using a regular ruler or tape measure. The main thing is that not the entire canvas is measured from start to finish, but only its working part, which begins after the end of the main recess of the attachment (approximately). Divide the resulting value by 2.54 (centimeters to inches) and round the number to one of the generally accepted standards: 10 “, 12”, 14 “, 16”, 18 “, 20”. A complete list of current sizes is given in the table above.

The second way involves calculating with the existing circuit. First you need to find out the pitch by measuring the distance between the centers of any 3 rivets and dividing the value by 2 (8.25 mm is 0.325 “, and 9.3 mm. 3/8”). Next, we count the number of links along the shanks. For 3/8 ”the value can vary from 40 to 68, and for 0.325 pitch it can be from 64 to 76 chain shanks. Knowing the exact number of links and pitch, go to the aforementioned size table and determine the length of the tire by comparing 2 values.

Installing a tire on a chainsaw

The process of equipping the tool with a saw headset does not require technical skills and is described in detail in the technical documentation of a specific model. In the absence of such a guide, you can always refer to the following instruction, which briefly and illustratively demonstrates each action. The explanation is based on the classic design, which is relevant for most devices.

The guide bar is located on the right side of the body, under a plastic cover secured with 2 nuts. We unscrew both and remove the protection.

On the 2 pins that held the cover, we install the tire by threading them through the longitudinal groove in the shank.

We put on the chain, placing the shanks on the drive sprocket and in the grooves of the tire. The cutting teeth, in the upper half, must point forward.

Put the protective cap back in place, but do not tighten it yet. For an accurate fit, slide the chain along the groove in the guide by hand.

Read more:  Champion 142 Chainsaw Carb Adjustment

After making sure that the blade runs freely, you can install the fastening nuts on the studs and slightly tighten them by hand (so that the cover does not dangle). Do not tighten, as we need freedom of movement of the tire.

It remains to tighten the chain by rotating a special screw located on the end or front side of the protective cover. Optimal tension, allows you to effortlessly remove the 3 chain shanks by grasping the link in the center of the bar.

Note. The new chain stretches quickly enough and requires constant tension checking. Monitoring the health of your headset is essential not only for safety, but also to improve performance. Well-tensioned chain, moves without difficulty, and at the same time does not vibrate at the points of contact with the guide.

How to choose a tire for your chainsaw

The variety of chain guides is quite extensive, but it cannot be called overly impressive. Modern saw bars are classified by slot width, blade length, sprocket pitch and shank. Based on the values ​​of these indicators, the replacement periphery is selected. Let’s analyze each parameter in order, starting with the most important.

The length of the saw blade determines the maximum immersion depth in the material and the allowable chain size that can be attached to it. According to the standard, values ​​are expressed in inches and are indicated on the part itself (in the area of ​​the shank), along with the recommended number of links. The standards differ depending on the pitch of the driven sprocket. Data for the most common varieties are shown in the following table.

The shank of the tire can be universal or branded, which will not fit most saw models. Each manufacturer recommends its own tooling, and sometimes openly imposes products, making it impossible to use other options due to the unique location of technological holes. For example, when installing a STIHL bar on a saw of any other brand, there are serious problems with putting on the chain, accompanied by inconsistencies in the holes of the tension and lubrication.

Recommendation. When choosing a tire for a simple, household chainsaw (not STIHL, Makita, Husqvarna), take a closed-type universal shank. For reliability, refer to the old guide or tool model.

The driven sprocket of the tire provides free movement of the belt at the bend point. By standard, the teeth can be sharpened to a chain pitch of 0.325 and 3/8 inches (rarely 0.404 and 1/4). Even with the possible combination of elements of different sizes, it is strictly forbidden to work with such a combination, since wear and tear and the likelihood of breakage increase sharply.

You can find out the required sprocket pitch from the marking on the side plate of the tire. If the data is erased, you can measure the chain used by knowing the distance between the centers of the first and third rivets, anywhere. Converting inches to metric gives the following values: 0.325 “= 8.25 mm, 3/8” = 9.3 mm, 0.404 “= 10.2 mm, and 1/4” = 6.35 mm.

The width of the groove determines the permissible dimensions of the shank immersed in it. This indicator indirectly indicates the class of the device. Simple, household guides, equipped with chains with the thinnest shank. 1.1. 1.3 mm. Amateur tooling has a wider groove, 1.4. 1.5 mm, and professional saw bars can accommodate shanks from 1.6 to 2.0 mm.

To increase the stability and efficiency of work, even the smallest backlash should be eliminated. The position of the chain in the guide should be tight, but without hindrance to movement. You can find out the required groove width by measuring the chain shank with a vernier caliper, or experimentally by attaching it to a new tooling.

Having found out the values ​​of all the above parameters, you will form a clear picture of the required part, and the selection error will be excluded. As a final touch, it’s helpful to know how the length of a chainsaw bar is measured and how important the number of chain links is. A brief breakdown of the topic, below.

How to Buy Correct Chainsaw Chain Replacement (Chain/Bar Numbers Explained) The Repair Specialist

Bus structure and structure

A general idea of ​​the device of any element consists of knowledge of its constituent parts and understanding of their interaction. In order to operate the tire as long and efficiently as possible, it is useful to have a clear picture of how it works. The functional role of the part in the chainsaw system is extremely clear to everyone who has watched this tool in operation. First of all, the bar serves as a guide for the chain, as well as a means of tension and lubrication.

At a cursory examination of the element, one gets the impression that it is cut from a solid sheet of metal. In fact, the tire consists of 3 plates (2 side and one central), securely fastened with rivets. The central element is an order of magnitude shorter and thinner than the lateral ones, which is due to the formation of guide grooves into which the chain shanks are immersed. Free space in the front part (on the nose) of the tire, occupied by a driven sprocket, which provides free chain movement when tensioned.

For ease of movement and protection against abrasion, the sprocket is mounted on a bearing, the center of which is riveted to the side plates. For maintenance of the mechanism, expressed in cleaning and lubricating the rollers, special holes are provided on both sides of the tire.

In the tail section of the guide, there are a number of technological holes. The largest, elongated aperture ensures a flat installation of the blade along two studs fixed to the engine crankcase. A chain tensioner pin is inserted into one of the 2 symmetrically located holes, and the smallest one includes the oil pump fitting, which supplies lubricant to the chain end during operation.

Chainsaw tire repair

Among the few problems that arise during the operation of the guide, the most relevant is associated with wear or deformation of the driven sprocket. This is a relatively simple nuisance that can be repaired in a domestic environment. It manifests itself in a jammed sprocket or a large backlash of the chain shanks with teeth. Repair requires a welding machine, an angle grinder and a suitable repair kit.

  • First of all, it is necessary to remove the damaged part. To do this, grind the rivets with an abrasive wheel and gently knock out with a hammer.
  • We remove the damaged element and carefully clean the groove (better with a rag soaked in kerosene).
  • Before placing a new sprocket in the tire, a layer of grease (lithola) must be applied to the bearing rollers.
  • As a fixing element, you can use previously knocked out rivets by placing them on a couple of welding drops on both sides. The protruding solder is removed with a grinding wheel.

If purchasing a replacement sprocket is tantamount to buying a new tire, you can try refurbishing the old one. Relevant in case of jamming, when the rollers are scattered, erased, but the part itself can still work. An ordinary drill with a diameter of about 2.5 mm can act as source of replaceable elements (to match the standard rollers).

We just clamp the drill in a vice, and cut the jewelry washers (you can use an abrasive one, but more accurately with a diamond one). To prevent small parts from flying apart, it is better to install a magnet nearby, which will attract the elements when trimming. To obtain a complete set of rollers and fill the circle, about 2 standard length drills are required. Having cut the required number of rounds, we put them in an asterisk and go to step 3, 4, of the previous instruction.

The described restoration method will extend the life of the guide, but soon there will be a problem with the wear of the sprocket, and it will have to be replaced (or the entire headset). A more complete demonstration of the restoration process is presented in the next video, which clearly shows the entire repair of a chainsaw tire with your own hands. The video, with helpful Комментарии и мнения владельцев from the author, conveys all the main aspects of the work.

Try to take regular care of your tire and its service life will increase significantly. Clean any dirt from the groove, lubricate the sprocket bearing and remove any burrs with a file. Spend 5 minutes on maintenance in 10 hours of operation, you will increase efficiency and save yourself from unnecessary costs.