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

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

Cutting with a chainsaw can be daunting when you don’t have the right size of the file for your .325 chain. The efficiency of your chainsaw heavily depends on the sharpness of its chain, and an improperly sized file can lead to ineffective sharpening and even damage your tool.

Fortunately, understanding the right file size for your .325 chain isn’t as complex as it might seem. Indeed, the key lies in the name – a .325 chain typically requires a 3/16″ (4.8mm) round file for optimal sharpening.

Now, get in-depth into the specifics of this topic, enhancing your knowledge and ensuring you’re equipped with the right tool for the job.

What File Size Do I Need For a .325 Chain? Find the Perfect Fit for Your Chainsaw

The specification of any chainsaw chain, including the .325 chain, is derived from its pitch measurement. The pitch is the average distance between two rivets on the chain, which is halved to determine its specification.

Hence, a .325 chain indicates that the average distance between its rivets is approximately 0.325 inches.

When it comes to sharpening such a chain, the round file size most commonly used is 3/16″ (4.8mm). This size is ideal because it corresponds well with the radius of the curve in the cutter of the chain.

Using a 3/16″ file, you can properly sharpen the cutting teeth of the chain, ensuring efficient cuts and prolonging the lifespan of your chainsaw.

Be mindful that a smaller or larger file may fail to sharpen the chain correctly, potentially causing inefficient cutting or damaging the cutters.

How To Choose The Right File Size For Your Chainsaw Chain- Step-By-Step Guide

If you use a file size that is too small or too large for your chain, you risk leaving behind burrs on its cutters. These hardened pieces of metal can dull your chain quickly, leading to inefficient cuts and an overall decreased reliability of your chain saw.

Some guiding steps will lead to choosing the correct size for you:

Identify Your Chain Size:

Look at the identification mark on your chainsaw chain. This will usually be a number like .325, .375, or .404. If you can’t find the number, measure the distance between three consecutive rivets and divide by two to get the pitch.

Consult the Manufacturer’s Guide:

Check the user manual or consult the manufacturer’s website for your specific chainsaw model. They will typically list the appropriate file size for the chain.

Determine the File Size:

For a .325 chain, the appropriate round file size is usually 3/16″ (4.8mm). This matches the radius of the chain’s cutter.

Chainsaws File Size Chart:

File size chart for chainsaws is important to consider when choosing the right file size for your chainsaw.

Below is a table illustrating the appropriate file sizes for different chains, considering two popular chainsaw brands – Oregon and Stihl.

Chain PitchOregon File SizeStihl File Size
.325″3/16″ (4.8mm)4.8mm
3/8″ 7/32″ (5.5mm)5.2mm
.404″ 7/32″ (5.5mm)5.5mm
1/4″ 5/32″ (4.0mm)4.0mm
3/8″5/32″ (4.0mm)4.0mm

Please note that these sizes are standard recommendations.

Tools Required For Successful Chainsaw Sharpening

Successful sharpening of a .325 chainsaw chain requires more than just the correct file size. Beyond the 3/16″ round file, you will need a few other tools to ensure the process is safe, effective, and efficient. Here’s a quick overview of the tools you need:

  • Chainsaw File Guide and Depth Gauge:

This tool is essential for maintaining the correct angle and depth while sharpening the chain.

  • Bench Vice:

A vice can hold your chainsaw steady during the sharpening process, reducing the risk of accidents and ensuring more precise sharpening.

  • Safety Gloves:

Sharp chainsaw teeth can cause injuries. Always wear sturdy gloves to protect your hands during the process.

  • Safety Glasses:

Small metal filings can fly off during sharpening. Protect your eyes with safety glasses to prevent any potential harm.

How To Sharpen a .325 Chains – Step-by-Step Guide

Sharpening a .325 chainsaw chain requires patience and precision. Here’s a step-by-step guide to help you through the process:

  1. Secure the Chainsaw: Begin by securing your chainsaw in a bench vice. Make sure the chain can still rotate freely.
  2. Align the File: Position your 3/16″ round file on a tooth on the chain. The file should rest against the front and top face of the tooth.
  3. File the Tooth: Using your chainsaw file guide, file the tooth at the correct angle. Always file from the inside of each tooth outward.
  4. Rotate the Chain: After sharpening one tooth, advance the chain to the next tooth and repeat the process.
  5. Check the Depth Gauges: Once all teeth are sharpened, check the depth gauges and file them down, if necessary, using a flat file.

Note that the aim is to keep all the cutting teeth the same length. If you accidentally file one tooth shorter, you must file all the teeth to match that length.

How Often Should You Sharpen Your Chainsaw?

The frequency at which you need to sharpen your chainsaw depends on several factors, including how often you use it, the type of wood you’re cutting, and the condition of your chainsaw.

As a guide, for average tasks, you should use a file to sharpen your chainsaw every time you refill it with fuel. If your chainsaw produces dust rather than wood chips, it’s a clear sign that it needs sharpening.

Other Common Chain Sizes and Their File Requirements

While the .325 chain is fairly common, several other chain sizes are frequently used across various chainsaw models. Some other common sizes are:

.375 or 3/8″ Chains:

These chains are typically found on professional-grade and some heavy-duty homeowner chainsaws. The right file size for a .375 chain is 7/32″ (5.5mm).

.404″ Chains:

It is often used for heavy-duty and professional applications, .404″ chains require a larger 7/32″ (5.5mm) file size.

1/4″ Chains:

These chains are typically found on smaller, lightweight chainsaws, often used for pruning or trimming. A 1/4″ chain requires a 5/32″ (4.0mm) file.

3/8″ Low Profile Chains:

These chains are usually found on consumer-grade chainsaws. These chains are ideal for light-duty work. The correct file size for a 3/8″ low profile chain is 5/32″ (4.0mm).


In conclusion, understanding your chainsaw chain size and the appropriate file size is critical. Selecting the correct file size for your .325 chain is essential for your chainsaw’s efficient operation and lifespan.

Using a 3/16″ (4.8mm) round file will ensure optimal sharpening, enabling you to confidently undertake your cutting tasks.

Personally, I recommend referring to your chainsaw’s user manual or manufacturer’s website for the most accurate and model-specific information.


What size file for 325 chain Husqvarna?

For a 325 chain on a Husqvarna chainsaw, the recommended file size is generally 3/16″ (4.8mm).

What size file for 325 chain in mm?

The file size for 325 chain is 4.8mm x 200mm

Will a 3/8″ chain fit a .325 sprocket?

No, a 3/8″ chain will not fit a .325 sprocket. These two components have different pitches and are not interchangeable.

What size file for Stihl 325?

The file size for Stihl is 4.8mm x 200mm.

What size file for .325 chain 16″?

For a .325 chain on a 16″ bar, the recommended file size is generally 1 dozen of 3/16in (4.8mm) by 8 inch round files.

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