How to Measure a Chainsaw Chain

measure, length, chainsaw, tire

Tire of the chainsaw: how to measure, choose, install and fix

Control of the movement of the circuit with fixing its tension and regular lubrication is provided by one simple and absolutely indispensable element. The saw tire belongs to the category of consumables, since it takes on peak loads that deform and seriously wear it out as it is working. This article will briefly and clearly show what criteria to select a new part, how to install on the tool and make easy repairs.

The general idea of ​​the structure of any element consists of knowledge of its components and an understanding of their interaction. To operate the tire as long and efficiently, it is useful to have a clear picture of the principle of its action. The functional role of the detail in the chainsaw system is extremely clear to everyone who observed this tool in work. First of all, the tire serves as a guide for the chain, as well as a means of its tension and lubrication.

With a cursory examination of the element, it seems that it is cut out of a solid sheet of metal. In fact, the tire consists of 3 plates (2 side and one central), reliably fastened with rivets. The central element is an order of magnitude shorter and thinner than the lateral, due to the formation of guide grooves in which the shanks of the chain are immersed. The free space in the front (on the nose) of the tire is occupied by a led by a stars, which ensures the free stroke of the chain during tension.

To facilitate movement and protection against erasure, the asterisk is installed on the bearing, the central part of which is attached to the side plates. For the maintenance of a mechanism expressed in cleaning and lubrication of rollers, special holes are provided on both sides of the tire.

In the tail of the guide, there are a number of technological holes. The largest, elongated opening, provides an even installation of the canvas along two studs fixed on the engine crankcase. In one of the 2x symmetrically located holes, the finger tensioner is inserted, and the oil pump fitter includes the smallest that supplies the lubricant on the shank of the chain when working.

How to determine the length of the chainsaw tire?

The cutting part is far from the entire length of the saw canvas. The distance is measured from the front of the tool body to the rounded tip of the chain installed on the tire. The resulting value is rounded to centimeters or inches, it is 2.54 cm. Then calculate according to the given table, which size is suitable for a specific tool.

If, going to the store, you doubt your abilities to determine the size of the chainsaw tire, take the tool with you or provide the consultant with a passport for the product, which usually indicates the main parameters.

Device and principle of operation

To independently eliminate malfunctions, the owner will need good knowledge of the device of the motorcycle. This is a device operating due to an internal combustion engine with one cylinder. Fuel fluid. Gasoline. The saw mechanism is moving due to a single.Stage chain transmission, for safety it is closed by the casing.

The main structural elements are the air purification system, the chain mechanism, the engine, the tension device, the ignition elements, the flywheel and the coupling. Many small details connect the main nodes and contribute to the reliable operation of the device.

The properties of automatic centrifugal clutch depend on the number of revolutions of the power unit. A low speed of rotation does not transmit rotation to the drum. Only when a large number of revolutions reaches the centrifugal force exceeds the force of springs, causing rotation of the drum. A chain and asterisk located in front of.

A brief resume

Bannered chainsaws, a chain and a carefully chosen bus will allow you to work effectively and calmly, without spending excessive physical and material resources. And it should always be understood that the choice of the components of the gasopying process, including the choice of tire, depend on the type of wood processed, working conditions, professional skills of the master. All this is purely individually and comes with experience.

Not everyone knows how to measure the chainship of the chainship. Chains of chainsaws are available in endless combinations of sizes, types and features. This is due to the fact that the chainsaws themselves differ in size and use. When the time has come to replace the chain, it is especially important to have all the correct information about the chain and its size. Only in this case you can replace it correctly.

The selection of the correct chain to the chainsaws is slightly more complicated than the search for other accessories for the power tool due to the unique method of measuring the chainsaw tire. The information below explains how the chains of the chainsaws are measured, the difference between these dimensions and how to quickly find the measurement numbers necessary to order the correct chain.

The length of the chain of the chainsaw is compared with the measurement of the saw tire. Some manufacturers sell chains for replacing only on the basis of the measured tire. It is important to know that there are no universal chains. A chain with a long tire will require a longer chain accordingly. However, the exact means of determining the length of the chain includes several measurement options, which ultimately affect how well the chain is suitable for your chainsaw.

First of all, it is worth considering the question of how to measure the length of the tire of chainsaw?

  • Measure the distance from the tip of the chain saw to the point when the tire first leaves the saw case. Roulette is useful for measuring and obtaining this information. It is necessary to round the measurements to the nearest even number, if the number was not accurate. The resulting number is the measurement of the tire. The most common values ​​of the bar are 16, 18 and 20 inches.
  • Lay the chain on a flat surface. Look for the links of the chain, which are sometimes called tips. These links protrude from the lower part of the chain, and they capture the toothed drive, nourishing the chain. Calculate the number of drive links in the chain.
  • Determine the height of the chain. Measure the distance between any 3 sequential rivets holding the chain together. Measure from the center of one rivet to the middle of the third link. Rivets are noticeable between drivenings and cutters. Cutting teeth that lie on top of the chain. To find out the height, divide the measurement by 2. A step, along with the number of drive links, describes the length of the tire that is needed when searching for chains for replacement.

Things you need: roulette. A chain that is not properly suitable for a chainsaw is a danger. Therefore, if you are not sure of choosing, ask a professional to help determine the length of the tire and choose the right chain. Contact the leadership of your chainsaw to make sure that you are buying the right type of chain.

Before working with a chainsaw or any power tool, read all the security warnings in the manufacturer’s management. Before replacing the chain on the chainsaw, turn off the spark plug or battery to make sure that the saw would not be rang.

Also, owners of chainsaws can read a useful article on how to change an asterisk on a chainsaw.

Below are steps that can also be taken before starting the search for a suitable chain.

  • Find out the measurement of the chain step by finding it on the tool, in the user guide, or dividing the distance between 3 links by 2 (it is recommended that this be done with a professional).
  • Get the measurement of the chain either by finding it on the tool, in the user guide, or by measuring the thickness of the drive links of the chain. All measurements should be accurate.
  • Calculate the number of individual drive links in the chain. With no exceptions. Now good news, everything else is easy to do. If you have these three digits, a suitable replacement chain will take only a few minutes. All you need to do is make the correct measurements and the number of links to a simple formula or online measurement calculator, and it will automatically determine the length of the tire.

All unique tire measurement systems require small awareness in terminology and other technical things. If you want to buy a new chain for your chainsaw, then this leadership will help the best. With the information provided in the article, it will be easier to narrow the choice to the chain that is needed in a particular case.

Use the method that seems to you the most convenient. Tire measurement differs from the actual chain length. Tire measurement is important when you replace the chain or buy a chain for the future replacement. It is important for each owner of a chainsaw to know how to measure the chainsaw tire. The measurement of the tire expresses the length of the guide rod of the chainsaw, and not the entire length of the tire, which is actually a little longer. If you want to know the true length of the tire, you will need not only roulette, but also effective measurement methods presented above.

There was never a chainsaw, here, to the case of the resulting, I want to buy a spare circuit. I read, from 30, to 40 cm 12 to 16 inches, I can’t understand how long the tire is (how to measure it correctly)? Saw EFCO 136 in advance!

Andryl wrote: I want to buy a spare circuit. I can’t understand how long the tire is (how to measure it correctly)?

When selecting a chain along the length, you just need to calculate the number of leading teeth. The tire is measured only by the working part, and what is hidden under the lid does not count “

On normal tires there is a marking that indicates a chain step. The thickness of the leading link and the number of links. On my tire at a length from the cover to the end of 43cm (with a stretched chain) there is a marking of 17 inches

Tire length. We pay attention!

That which is not least throws into the eyes when choosing a chainsaw is the size of the tires: it depends on them how large the log of the log can be cut.

The length of the chainsaw tire is one of the most important parameters affecting convenience, speed and safety of work. This characteristic should be agreed with the operating power of the chainsaw engine, which is why any serious manufacturer in the technical passport of its products is indicated by the recommended parameter of the length of the tire.

What is fraught with ill.Conceived use of too long or too short tires? You should start with the fact that the size of the tire recommended by the manufacturer cannot be categorically. Smaller size is allowed within reasonable limits, but it is also not recommended: there is an opinion that a short chain provides a lower load on the tool, but it should be remembered that this causes serious harm to the saw headset. The permissible deviation range must be indicated by the manufacturer in the technical documentation attached to the saw.

Long tires of chainsaws give greater convenience when working with a significant material, for example, to perform deep cut in a thick log. 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 sawing will be simply impossible. The saw process will be slow, gasoline consumption will be increased, the motor will instantly worn out.

The smaller tire length with a properly selected tool of the tool will provide high sawing speed and will be optimal for use in work with small trees or boards.

The length of the saw tire, as a rule, is indicated in inches both foreign and domestic manufacturers. Tires are marked in a 2.Inch step. Below is the equivalent in the familiar to the Russian metric system of lengths:

If the saw saws crookedly. Reasons and what to do

Often, sawmiths are faced with the fact that at one moment the saw begins to saw crooked. This causes not only inconvenience, but also complicates the treatment procedure. The sawmill has to make efforts not only to keep the tool, but also to equalize it. Few people know that it is prohibited to operate a tool with such deformation. We will find out what is the cause of the uneven sawing of the chainsaw, and what is dangerous for the sawmill.

If the saw begins to cut crookedly, then this indicates the presence of an inconspicuous deformation of the tire. The deformation is associated with the side of the tire, which has uneven wear. As a result, the chain is located not evenly, but with a slight skew. The skewing value can be invisible to the eye.

It is interesting! The cause of the uneven sawing of a chainsaw may be uneven wear of the link links or their incorrect sharpening. Before replacing the tire, make sure that the chain is working.

Eliminate the malfunction in the form of uneven wear of the tire can be replaced. It is almost impossible to carry out uniformly grinding sides of the guide, so it is recommended to replace it with the chain. The danger of the exploitation of a deformed guide chainsaw is that the tail of the chain can jump out of the groove, which will entail not the most prosperous consequences.

The tire of the chainsaw, like the chain, experiences heavy loads, so its wear is observed

With wear, it is important to replace the part in a timely manner without waiting for adverse consequences. How to choose, and what to consider when buying a tire on a chainsaw, is described in detail in the material


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Tire and chain installation

Tire dismantling is carried out for cleaning the oil pipeline, checking the technical condition or replacing. The sequence of work is painted in the instructions for the operation. Upon completion of the installation, you should make sure that there is no backlash and tightening threaded fasteners.

In the presence of certain skills, it takes only a few minutes to dismantle and install a new or sharpened chain. The technology prescribes the inclusion of an unauthorized launch block and in some cases, an emergency stop mechanism.

  • Depending on the design of the stretch device, the circuit is weakened to the desired degree by the rotation of the adjusting screw or installation disk, to the free exit of the shanks from the groove of the guide tire.
  • After checking the direction of rotation, the shanks of the new chain are launched into the guide groove of the groove and the crown of the leading star. The tension is in the reverse order.
  • To check the degree of tension, it is enough to pull the chain in the middle of the tire. The output of the shank of the link in this place should not exceed 2/3 of its height. Correctly stretched circuit should move along the tire from a slight force.

After installing and adjusting the saw, it is advisable to start the engine and maintain the saw at medium speeds for several minutes. During this time, you can check the operation of the lubricant system.

measure, length, chainsaw, tire

After turning off the power unit, it is necessary to turn on the lock lock and check the headset for the lack of local overheating of the tire and change the degree of tension of the chain.

Link types. Design or shape shape

In shape, a modern saw set of two types. Chipper and cheese. Each type differs constructively, affecting performance parameters and sharpening features.

  • Chipper links look like a sickle and have low performance indicators. Their main advantage is the simplicity of sharpening with a file. It is due to the simplicity of sharpening, many sawmills prefer to choose models with a chipper or sickle type of link
  • Chiselic links have the shape of teeth in the form of the number “7” with a pointed corner part. Such teeth on the chain show high performance indicators, but it is difficult to grind them with a file

CHAINSAW BAR LENGTH. What size bar is right for your chainsaw?. How to choose a chainsaw bar.

Chisel and chipper types of links. Pay attention

How to measure the length of the chainsaw canvas: obtaining the correct measurement

The first thing to do when replacing the chain of the chainsaw is to know how to measure the length of the chainsaw canvas.

If you need to replace the saw tire or chain, or you want to know the cutting ability of your chainsaw, you can do it yourself without asking a specialist.

The difference between the length of the bar and the cut length

When considering the size of the bar, two measurements must be taken into account:

The length of the cut, or cutting ability, will certainly be several inches shorter than the total length of the rod.

Obtaining the correct measurement

If you can measure the length of the fabric of the chainsaw yourself, you do not waste time visiting a local store and you can buy a new rod over the Internet, which will save your time and money.

For this, the only condition is that you must accurately indicate the length of the rod to be sure that you are ordering the right. That is why the question arises of how to measure the length of the chainsaw canvas.

In this information you will learn more about this and other frequently asked questions.

How to measure a rod on a chainsaw

Short note: depending on the manufacturer, you will find the length of the bar on one side of the saw blade.

You can get the desired size immediately without opening the saw case.

However, due to wear, it is sometimes difficult to read this information on the rod.

To measure the length of the bar, unscrew the screws or mechanisms for fastening the chainsaw housing.

As soon as you open the suitcase, you will have a strip open.With the help of a measuring tape, now you can measure the entire length from one end to the other.

This measurement will show the actual size of the chainsaw canvas.

The most common dimensions of the chainsaw tire are in the range from 8 to 20.

Three more numbers for verification

When it comes to replacing the chainsaw tire, the three other numbers should be correct to make sure that the new tire is ideal for your chain.

One.The length of the chain

measure, length, chainsaw, tire

To measure the length of the chain, you need to calculate the number of links. The sizes of cells are standard for all brands.

If the number of links in your chain is 84, as in the example in the next figure, then this number on the rod should be indicated in the specification field. Usually this value is engraved on the same strip or, in any case, should be taken into account when buying.


A step is a size that is also indicated on the tire, and is a distance between the rivets of the chain.

In our example, the chain step is 3/8 inches.


Caliber is the width of the groove along the external perimeter of the tire, which should correspond to the width of the chain. Link

Here’s how to find a sensor rating, as shown in the image below. In our case, this number is 0.050 “.

After you checked these three numbers, the length of the chain, step and thickness, along with the length of the tire, you must keep in mind these dimensions when buying a new tire.

Unfortunately, after many years of use, information about the block at your bar can be very difficult to read. On other columns, these numbers will not be affixed.

All these data should be correct so that your chain is correctly approaching the new bus.

When should replace the chainsaw tire?

The tire of the chainsaw should withstand very serious loads. The chain, first of all, rotates around itself at high speed, and during cutting it should withstand strong vibrations, twisting and stress.

Therefore, you need to know how to recognize the signs and damage that will tell us when to replace it.

From the next video, we can learn a lot about the wear of the tire of the chainsaw.

Description of tire types for chainsaws

There are many types of tires for chainsaws on the market, and they are designed to perform certain tasks with some advantages and disadvantages.

Below we will list the most common.

Whole bars are designed for sawing logs of solid rocks and thick bark in very dusty conditions. These are steel rods resistant to scratches and corrosion.

Some types of continuous rods have interchangeable nose, because it is a part that wears out faster.

The disadvantage of these bars is that they are more expensive and tend to heat up hard, scattering part of the power developed by the saw engine.

The nasal rods of the stars

The strips with a sprocket of the sprocket allow the chain to rotate faster due to reduced friction, lower heating and lower power losses.

Front stars interchangeable rods

These types of rods are one of the most common, and in the case of a gear breakdown, the advantage is that you do not need to replace the rod as a whole, which is much more convenient. They are a little more expensive.

Frequently asked Questions

What length is best suited for a chainsaw canvas?

The bar with a length of 14 to 18 inches should be suitable for everyday use, for example:

This size of the bar is not suitable for the most difficult tasks, but it is ideal for home use.

Whether chainsaw tires are universal?

Not. With some exceptions, it is impossible to use the saw tire of one brand on the chainsaw of another brand.

Why is my chainsaw does not cut directly?

When the chainsaw begins to pull on the one hand, this is a sign that the blade needs to be repaired, although this can also be a warning about a more serious problem.

Chainsaws. Dangerous and complex tools. If there are appropriate precautions, safety, knowledge and equipment, you can ensure the performance of work without any problems.

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