The Ultimate Guide to Chainsaw Bars

When it comes to getting the job done right in your backyard or on the job site, having the right tools makes all the difference. Luckily for you, we know a thing or two about chainsaws and what makes them tick. Whether you're pruning a few branches off your old oak tree or clearing a lot for that next big project, the size of your chainsaw bar matters more than you might think.


The most common chainsaw bar length typically ranges between 12 and 20 inches but can come in sizes as large as 72 inches. These smaller bar sizes are more popular among residential users while the larger bar sizes are typically for professional use. To get the most out of your chainsaw, knowing how to size and measure the chainsaw bar is essential.

What Is a Chainsaw Bar?

Chainsaw bars, also known as guide bars, are a very important part of a chainsaw. It is the sturdy, elongated bar that guides the cutting chain. This dictates the precision and efficiency of the saw. Whether you're a seasoned professional or an at-home chainsaw enthusiast, knowing the ins and outs of chainsaw bars is key when it comes to selecting the right one.

Anatomy of a Chainsaw Bar

A typical chainsaw bar is made up of the following parts:

  1. Bar Body: The main part of the chainsaw bar, is usually made of steel, which serves as the track for the cutting chain.
  2. Groove or Rail: The guide slot in the bar body where the cutting chain runs.
  3. Nose: The front tip of the bar, which can be sprocket-nosed or solid-nosed, depending on the design.
  4. Mounting Holes: These holes are where the bar attaches to the chainsaw's housing, securing it in place.

How To Measure a Chainsaw Bar

You can measure a chainsaw bar in two ways:

  1. Measure the distance from the tip of the bar to the chainsaw body. Lay the bar flat on a stable surface, extend the tape measure from the bar’s tip to the point where it meets the chainsaw body, and then round the measurement up to the nearest set size.
  2. If you’re struggling to measure, check the bar’s tail for the printed length. If that’s also not easy to find, count the drive links on the chain.

Bar Compatibility with Chainsaw Models

It's crucial to ensure that your bar size is compatible with your chainsaw model. The most frequent chainsaw bar lengths are 16, 18, and 20 inches. These sizes offer a good balance between maneuverability and cutting capability, making them ideal for most homeowners and semi-professional users. Brands like STIHL and Oregon Chainsaws offer a range of models supporting these sizes, cementing their status as go-to options in the market.

Which Chainsaw Bar Length Is Right For You?

Long vs Short:

Choosing a chainsaw bar length also involves considering the type of cutting you intend to do. A longer bar can handle larger diameters of wood but requires more power and can be harder to manage. On the other hand, a shorter bar is better for smaller tasks and is easier to control, making it suitable for less experienced users.

Cutting Intensity and Frequency:

How frequently do you plan to cut> If you typically use your chainsaw for lighter, occasional work, then a shorter bar will work just fine! But for professional loggers who are doing a lot of heavy-duty cutting, a longer more durable bar is best.

How To Maintain Your Chainsaw Bar

Most problems that occur with a bar are related to incorrect chain tension, dirt, and poor lubrication. To keep your chainsaw bar performing at its best it's best to keep in mind the following:

Bar replacement nose kits:

Bar replacement nose kits are crucial for maintaining the performance and extending the life of your chainsaw. These kits allow you to replace just the nose portion of the bar, which is the most subject to wear and tear. Regular replacement ensures that your chainsaw operates efficiently and safely.

Regular Cleaning: 

After each use, clean the chainsaw bar thoroughly to remove sawdust, debris, and resin buildup. Keep the bar rail clean by scraping the inside with the edge of a depth plate edge or RatchetScrench tool tip.

Lubrication: 

Keep the bar well-lubricated using chainsaw bar oil. Proper lubrication ensures smooth chain movement and minimizes heat generated during cutting.

Genuine Oregon® Chainsaw Bars From Westcoast Saw®

Don’t let bad equipment get in your way. With Oregon® brand chainsaw bars from Westcoast Saw®, you’ll enjoy optimal efficiency and prolong the life of your chainsaw!