What File Size Do I Need For a .325 Chain?

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There are many sizes of chainsaw files, and it can be challenging to know which one to use. However, learning the correct size will prevent you from paying for professional sharpening services more often than necessary. 

If you want to know what file size you need for a .325 chain, here is a quick guide from our resident woodworkers:

The Importance of Picking the Correct File Size

When sharpening your chainsaw chain, it’s essential to use the proper file size. Using a file that is too small can cause the metal to wear away too quickly. 

However, if you’re using the right file, you can follow rule 80/20 and keep most of the material under the cutter while only leaving a slight overhang.

You can end up damaging the blades of the chain by using a file that is too large or too small when sharpening it. If you don’t have the chain completely reshaped, it will function poorly.

sharpening chainsaw with Stihl 2 in 1 Easy File Chain Sharpener

The simple reason is that if the chains are carved incorrectly or too much metal is removed, the chainsaw will be challenging to operate and manipulate.

Inspecting the Chain Size Details

You must inspect the chain size details to determine the correct file size. Consider the following: 

When you use a file with a wider diameter, it will get rid of the blade’s hook, which is responsible for providing efficient cutting. 

When you use a file with a smaller diameter, it won’t cover the cutter’s upper tip when you sharpen it.

Corona CF425018SC0CD Round Chainsaw Smooth Cut File

Furthermore, the residual chips may be significantly smaller or larger compared to the original, even if the file size is only slightly off. Cutting quality will suffer, and you’ll waste time and energy if you use the wrong files.

Additionally, there’s a plastic roll for measuring the clutch, chain, file, and bar available from Oregon and Stihl saws in particular. The bar can be wiped down with it as well for checking. 

How to Choose the Most Accurate File Size for Your Chainsaw Chain

To choose the most accurate file size for your chainsaw chain, you have two ways to get this done: 

The chain type number is crucial information on the cutter’s side. Check this value against the available chainsaw file size chart and select the appropriate option.

The chain’s pitch can also determine the ideal chain file size. To determine the chain’s pitch or size, simply measure the distance between any three consecutive rivets and divide by 2. That’s it! 

chainsaw pitch

Take note, before you start working with a file, make sure it’s the correct size for the chain saw. Manufacturers will typically suggest varying sizes depending on their model.

Besides the diameter, you also need to consider the type of file you need. For instance, while a square edge is required for a chisel cutter, a round file is necessary for a chipper cutter.

The round file is not recommended for sharpening the chain saw depth gauge. Instead, we recommend using a flat file to maintain its shape.

The Ideal and Precise .325 File Size

Various standard chain sizes are commonly used in most parts of the world. But in the case of the .325 chain saw blade, we suggest using a 3/16 inch file with a .025 depth gauge [1]. Several swipes with this file will show how effective metal should come off.


A 3/16” file size is ideal for fitting the patterns of the blade precisely, keeping the surface area of the chain evenly sharpened. It can also add a nice-sharpening edge to the teeth.

See Also: File Size for 3/8 chain

Oregon 3/16-Inch File Size

Our most recommended 3/16-inch (4.8mm) file size is from Oregon. This 3/16″ file size from Oregon is made with a robust double-cut round spiral-ly design that ensures longevity and prevents clogging.

Oregon Chainsaws File Size Chart

File Size 

Chain Size

Chain Type of Oregon

7/32 inches (5.5mm)

.404″ x .063″ (1.6mm)

3/8″ x .063″ (1.6mm)

3/8″ x .058″ (1.5mm)




3/16 inches (4.88mm)

All .325″ Chains


11/64 inches (4.5mm)

3/8″ x .043″ (1.1mm)


5/32 inches (4mm)

1/4″ x .050″ (1.3mm)

3/8″ x .050″ (1.3mm)



Note: There is also a 3.22mm (⅛-inch) Oregon file size if you have a Stihl ¼-inch x .043-inch or 1.1mm chains.

Stihl Chainsaws File Size Chart

Chain Pitch Size 

Chain File Size

Chain Type of Oregon

Sharpening Kit Number


3/16 (4.8mm)

5605 750 4328

5605 007 1028

Changing Chainsaw Chains

Depending on the case, you may wish to upgrade or downgrade your chain. The.325 may be a good option for occasional use due to its diminutive size and rapid firing rate, but it may not be the best for your typical requirements.

Stihl Chainsaws File Size

Due to this reason, it is a common choice for those who want to maximize their chainsaw’s performance. 

But in changing the chain, you’ll need a new sprocket and a new bar to change your saw’s chain size.  


If the blades on your chain saw are dull, it doesn’t matter how powerful or extensive your saw is; you can’t use it to cut. But now that you know what file size you need for a .325 chain, cutting is just easy.  

Our woodworkers also suggest the Oregon 3/16″ chain saw file for sharpening the saw blades of a .325 pitch chain saw as it provides precise and consistent results. 

Robert Johnson is a woodworker who takes joy in sharing his passion for creating to the rest of the world. His brainchild, Sawinery, allowed him to do so as well as connect with other craftsmen. He has since built an enviable workshop for himself and an equally impressive online accomplishment: an extensive resource site serving old timers and novices alike.
Robert Johnson
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