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Familiarity with gas chainsaw

A comprehensive look at the gas chainsaw; an attempt to introduce a chainsaw for cutting woods


Even if you are not an activist in the horticultural, forestry, and logging industries, you have at least a few times seen a gasoline or electric saw on television and witnessed it in a situation where an actor is holding it in fear and intimidation.

Although this device is very practical, its use in horror movies is not accidental at all; a gas saw is a really powerful and scary tool. But working with this powerful and practical device is not as easy as it seems in movies.

Although this device is very practical, its use in horror movies is not accidental at all; a gas chainsaw is a really powerful and scary tool. But working with this powerful and practical device is not as easy as it seems in movies.

The existence of an irrational and uninformed view of the chainsaw an excuse to explain in a written note the different components, how it works and how it differs from an electric saw.


So if you are one of those people who want to get scientific and accurate information about gas chainsaws, we recommend that you follow the text to the end.

Far from engaging in purely scientific information, we strive to convey what is needed in a simple and understandable way to the general public.

Getting to know a gas chainsaw with this note will be much easier than you think. Cognition that can help a lot when buying the device.



Chainsaw and its operating philosophy

Before giving a detailed description of the structure and operation, it is not bad to take a look at the operating philosophy of the gas chainsaw to have a more accurate understanding of how the components work with an overview. In a chainsaw, the propulsion of a small motor will be used to turn a chain.

In terms of appearance, this chain has blades with a special orientation on its outer wall, and by rotating the chain, which coincides with the movement of these blades in a straight line, the power of cutting a gas chainsaw will be created. To cut each section, it is enough for the section to be in line with the chains and blades.


It is obvious that the constant friction and stretching of the blades to the cross section of the body, for example a tree, will cause it to be cut. This philosophy is the function of a gas chainsaw, the general idea of which is based on this.

But you will find out how and with what structure this idea will be implemented in the following. In the definition that will be given due to the knowledge of gas chainsaw, a mechanical or electromechanical device (in electric models) that is portable and an operator can cut it.

This tool will be used in a wide range of uses and applications, but the common point of all these purposes and applications is cutting and cutting wood.


Historical background of gas chainsaw

Gas chainsaw in its current form has no historical background and is unique to the modern world, but the roots of the saw on modern gasoline date back to 1905. In 1905, Samuel G.

Bens, a resident of San Francisco, USA, came up with a new idea and design to bring saws that had a history but were always used only manually to a new world.

It was Samuel who first felt the need for a saw with motives other than human muscles when cutting huge trees-redwood-, and this need became the mother of the invention of the gasoline saw.

Of course, his saw is not very similar to what we know today as a chainsaw. Samuel's power was supplied by an external source, and its large size made the device virtually non-portable.

The only thing that stood out about this saw was the idea of ​​using propulsion to cut. The idea was used almost unchanged until 1918, but in that year the tool we know today as the gasoline saw was invented.

James Shend, a Canadian, went a step further and opened a new chapter in the use of this device by upgrading Samuel Saw.

The process of mass production of the device, however, took a long time, and finally the Canadian company transferred the production rights of its product to the German company Festo. It was then that gas chainsaws were able to be produced and distributed on a global scale.

It should be noted, however, that the tool you are working with today is only fundamentally similar to the Canadian saw; over the decades, this device has undergone a lot of growth and development.


Components and structure of gasoline chainsaw

Each mechanical device is basically composed of a set of different parts, each of which, by performing a specific task, makes it possible to achieve the ultimate goal of the device.

In the case of gasoline saws, the main goal is to cut, and all the components and parts try to achieve this goal in the best possible way.

In the following and in several sections, we will introduce the main components of gas chainsaws.


Gas chainsaw motor

Gas chainsaw motors are traditionally two-stroke and operate on an internal combustion system.

Usually, the engine volume of these devices is between 30 and 120 cubic centimeters. Of course, keep in mind that in electric chainsaws, the motor actually has a different structure and is electric.

It is very clear that in an electric motor there is no volume of the engine and cylinder and a coil will produce the output power. In a saw motor, chemical energy is converted into kinetic energy, causing an output shaft to move.

This kinetic energy will eventually be transferred to the device's mobility mechanism. The fuel will reach the gasoline chainsaw through a traditional or electric carburetor.

Depending on the condition of your device, you may need to adjust the carburetor manually, but electric carburetors do not require this and the necessary adjustments will be made automatically.

This makes it necessary to pay more attention when working with older and more traditional models. Note that the basis of gas chainsaw operation is constant mobility and change of position.

Therefore, you need to control the operation of the engine, otherwise the engine may suffocate due to incorrect engagement of the device and in the worst case will be damaged and caught fire.


Mechanism of movement of gas chainsaw on wood

The movement mechanism of a gas chainsaw is composed of two main structural parts; Centrifugal clutch and wheel-chain structure.

After increasing the speed of the motor output shaft, the centrifugal clutch engages using the centrifugal force created and the motor output force is transmitted to the propulsion mechanism.

Note that in the gasoline saw, the clutch also acts as an interface between the engine and the drive mechanism.


The clutch transmits the input force to the wheel, which is part of the wheel-chain system, causing it to rotate. Here we need to use an allegory to better understand.

The structure of the gas chainsaw in this section is very similar to the structure of a bicycle.

The centrifugal clutch acts as the pedal that rotates with the rider's foot. This rotation is transmitted to the chain by a pedal and a plate, and this chain rotates because it is fixed between two large wheels.

In a chainsaw, the same rotation of the chain is required and will cause the cut. Note that in the example above, the cyclist's leg muscle plays the role of driving the engine.


Chains of gas chainsaw


All components and structures in the saw are used for one purpose; Continuous and fast rotation of saw chains. The chain plays a key role in this and scores what has been done in all structures.

Chains are made of hundreds of identical metal pieces that are flexible despite their high stiffness and strength due to the type of connection.

In the body of the chain, we also see the use of small metal blades, all of which are installed in a certain way and with a certain angle.

In fact, keep in mind that the chain itself will not cut the wood, but the chain will allow the rotation of multiple blades just by rotating it.

These are the blades that will cut the wood over time with constant, fast and frequent contact with the wood surface. The multiple blows of these blades are like hitting a trunk with a sharp, sharp knife thousands of times per second.


Blade or saw for a gas chainsaw

The blade is the part on which the chain is mounted and moves on its bed. If you look at the saw from different worlds, you will notice that the chainsaw chain is not abandoned and is basically fixed around a metal plate.

This blade makes the front of the gas chainsaw look like a sword. Apart from its appearance, this plate also has a rail-like shape at the edges, allowing the saw chains to move quickly, in the direction and without falling.



This is not the whole story.

Note that in these sections we only refer to the parts of the structure of the gasoline saw that play a pivotal role in the performance, but this does not mean that the gas chainsaw has no other components or other parts do not play a role in the work.

Many parts of a chainsaw have a protective role and facilitate your workflow interaction with the saw. Certainly not all the details and details are in the text, but as you will see, you will learn a little more about a very key piece in a chainsaw; Centrifugal clutch.


Eccentricity clutch or centrifugal clutch

An important part of how a chainsaw works owes this part. Many people may think that the engine is the most important part of this device, and this is quite true, but without a centrifugal clutch, working with the engine and the whole gas chainsaw will become a nightmare.

By understanding how the centrifugal clutch works, you will better understand the importance of this part.

Have you ever wondered why the chainsaw does not rotate constantly after starting the gas chainsaw blade engine? A phenomenon that, if present, could be very dangerous and reduce the safety of working with the device.

It is the centrifugal clutch that helps in this regard. The clutch will not allow the engine output to engage the drive structure (wheel-chain) when your engine is idling and you are not operating it.

But at the same time as squeezing the gas and increasing the engine speed of the gas chainsaw, the clutch, as an intermediate limit, will transfer the engine output to the wheel-chain.

If, for any reason, the chainsaw of the gasoline saw encounters too much external force in such a way that it comes close to stopping, the centrifugal clutch, in reverse operation, will again cut off the force coming from the engine to the wheel-chain.

This idea is very much a practical tool for maintaining health.

Because in some cases, due to the operator's mistake or encountering unpredictable levels, the chain may get stuck, and in this case, on the other hand, the saw may be torn from the operator and thrown, which is life-threatening. On the other hand, it may damage the engine and the wheel-chain structure.

If the centrifugal clutch is not fitted to the gas chainsaw, you will have to kick suddenly as soon as the saw chains hit the wood and wood surface and even the tool will fall out of your hands.

However, with this clutch, this does not happen because this clutch controls the force transmitted from the motor to the sprocket, depending on the change in the resistive force that is present in front of the saw chain.

This prevents the device from being suddenly kicked or thrown back or forth after a call.

This continuity of output power, while stabilizing it, is one of the fruits of this practical idea in gas chainsaws, which cannot be ignored.



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