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How does a chainsaw work

How does a chainsaw work. A chainsaw is a handheld power tool that uses a chain of sharpened teeth to cut through wood. The teeth are mounted on a rotating bar, and the bar is powered by an engine. When the trigger is squeezed, the engine powers the bar, which rotates at high speed and cuts through the wood.

The chainsaw engine works by burning gasoline and mixing it with pressurized air. The engine forces the gasoline and air mixture to pass through a small carburetor, which turns part of the mixture into a combustible gas.

The amount of power needed for cutting is determined by how fast the bar rotates. Most chainsaws can be adjusted so that they rotate at various speeds. Some saws are even designed to be adjustable while the engine is running, allowing people to cut through several different types of wood more easily.

In this article, we will take a look at how chainsaw work. We will start by discussing the different parts of the saw, and then we will move on to how it operates. Finally, we will take a look at some of the dangers associated with using a chainsaw.

How does a chainsaw work

A chainsaw typically consists of a sturdy steel or aluminum body that houses the engine and chain mechanism. A hand hold protrudes from one end for the user’s convenience. The other end houses the engine and is often designed to act as a counterbalance when the saw is in operation.

Next, let’s look at how the engine works. The chainsaw has two types of engines: an electric starter motor or a pull cord type where the user starts the engine by pulling on a cord running through the body of the saw.

How electric motor chainsaw work

It is the most common type. Electric Chainsaw consists of a small electric motor that turns a gear that in turn turns the flywheel. The flywheel is connected to the crankshaft, which is turned by the piston as it moves up and down in the engine. This, in turn, rotates the drive shaft, which is connected to the bar.

How pull cord engine chainsaw work

The pull cord type of engine is started by pulling on a cord that runs through the body of the saw. This pulls a piston up in the engine, which starts the crankshaft turning. The flywheel is then turned by the crankshaft, and this turns the drive shaft, which rotates the bar.

Once the bar begins to turn, you can engage it with the chain by pulling on a bail handle that protrudes from the body of the chainsaw. The teeth of the chain are now engaged with wood, and as you pull back on the bail handle, you are cutting through whatever type of wood is in front of the chainsaw.

After you squeeze the trigger of the chainsaw, the engine starts and continues to run until you release it. As your hand moves back along the handle, your arm provides resistance that keeps tension on the chain so that it doesn’t slip off the wood.

Many modern chainsaws also have an automatic chain oiler that feeds oil onto the chain as its running. This keeps the chain lubricated and reduces friction, which enhances its cutting ability.

Different parts of chainsaw and its functions

Now that we’ve gone over the basics of how a chainsaw works, let’s look at some of the different parts of the saw and discuss their functions.

The engine

It is the heart of the chainsaw. It provides the power that drives the chain and allows you to cut wood.

Chainsaw Bar

The bar is attached to the body of the chainsaw and protrudes from one end. The teeth on the chain are engaged with wood as soon as they come in contact with it, allowing for easy cutting through various types of lumber with minimal resistance. The saw chain is a series of steel links that have sharp teeth on them.

Chainsaw Body

The body of your saw provides a place to hold the bar as well as housing important safety features such as the starter, trigger and bail handle. In some cases, it also serves as a counterbalance when you are operating the chainsaw. The chain catcher is attached to the body of the saw. It prevents the chain from flying off the bar if it comes loose. The bar oiler, on most models, is also housed inside the body of the chainsaw and serves to lubricate the chain as you cut wood.

Kickback Brake

The kickback brake is designed to prevent injuries that can occur when a kickback occurs. The spring-loaded clutch protects the saw from damage if the chain comes off.


The trigger is located on the handle of your chainsaw. When you squeeze it, it starts or stops the engine through a series of complicated levers and gears inside the body of the chainsaw. Pulling back on the bail handle allows you to engage or disengage the chain from the wood.


The handle is where you hold the chainsaw as you cut. It’s important that it be comfortable for you to grip and that it has a good anti-slip surface. The sawdust blower helps clear debris from the cutting area, which improves your visibility and allows you to continue cutting without interruptions.

Safety Features

Finally, let’s take a look at some of the safety features of a chainsaw.

A kickback brake is built in to prevent the saw from shooting backward toward your body when you are cutting. The brake is engaged automatically when your hand moves to the end of the saw, which causes it to stop rotating.

The chainsaw also has a chain catcher that prevents the chain from flying off the bar if it breaks or comes loose. A spring-loaded clutch spins the bar forward so that you can easily remove any debris that has collected around the bar.

The features mentioned above are all that you need to know to operate most chainsaws.

Final Words of how a chainsaw work

Remember, however, that there are many different types of saws available with varying degrees of power and safety features. If this is your first chainsaw, it’s best not to go out and buy one until you’re sure you know what you’re doing. Be sure to read the manufacturer’s instructions carefully and take a safety training course before using your chainsaw.

FAQs about how does a chainsaw work

Q: What are the different parts of a chainsaw?

A: The engine, bar, chain, body, chain catcher, bar oiler, kickback brake, trigger, and handle are all parts of a chainsaw.

Q: How do I start a chainsaw?

A: To start a chainsaw, you squeeze the trigger to activate the engine. You then pull back on the bail handle to engage or disengage the chain from the wood.

Q: What is kickback?

A: Kickback occurs when the saw chain becomes disengaged from the wood. This can cause injuries to someone holding or near the chainsaw.

Q: What are the safety features of a chainsaw?

A: There are many different types of safety features on a chainsaw including kickback brakes, spring-loaded clutches, and chain catchers.

Q: What should I do if the chain comes off the bar?

A: If the chain comes off the bar, you should stop the chainsaw immediately. You can then either reattach the chain or replace the chainsaw.

Q: How does a chainsaw oiler work?

A chainsaw oiler is a small reservoir that sits on top of the bar of your chainsaw. As you cut wood, the chain pulls oil from the reservoir and coats the links in a thin film of lubricant. This helps keep the chain running smoothly and prevents it from wearing out prematurely.

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