When working with chainsaws, it’s important to understand the size of the file that should be used for a specific chain.
The size of the file used will depend on the gauge of the chain that you have. In this blog post, we’ll look at what size file for 3 8 chains should be used.
What is a chain file?
A chainsaw file is a special tool for sharpening the cutting edge of your chainsaw’s blades.
It has a curved shape that’s designed to fit against the teeth of the blade, allowing you to more precisely sharpen it.
Chainsaw Files Common Sizes
Choosing the right chainsaw file for your saw is essential—but don’t worry, it’s easy to do! All you need to know is the pitch size of your chainsaw.
Pitch size measures the height of the teeth. Higher teeth mean a higher pitch, whereas lower teeth mean a lower pitch.
You can measure the pitch by finding the distance between three rivets.
After identifying the pitch size, you can work out the size of the file you need using the chart below:
| Chain Pitch | Roud File Diameter |
| 1/4 | 4.0 |
| 0.325 | 4.8mm or 3/16 |
| 3/8 | 5.2mm or 5/32 |
| 0.404 | 5.5mm |
Characteristics of chainsaw file
Cross Section
Chainsaw files are usually circular in shape with a cross-section that has two symmetrical sides. Some chainsaw files may also have square, rectangular, or diamond-shaped cross-sections.
Profile
Chainsaw files are blunt, maintaining the width of their cross-section along the whole length. The file also has a safe point that helps to ensure the safety of the user.
What size file for 3 8 chain
The size of the chainsaw file you will need depends on the pitch size of your saw. The most common sizes are 4.0mm, 4.8mm, 5.2mm, and 5.5 mm for a pitch size of 1/4”, .325, 3/8”, and .404 respectively.
How to determine file size
To determine the size of your file, you need to first identify the pitch size of your chainsaw. Pitch size measures the height of the teeth. A higher pitch size will mean a larger file size, and a lower pitch size will require a smaller file.
You can measure the pitch by finding the distance between three rivets. As mentioned in the chart above, the suitable file size for a 3/8” pitch size is 5.2 mm.
Pitch Length in Chainsaw Chains, Explained
If you are going to select file sizes, you need knowledge of pitch lengths. It essentially reflects the distance of the adjacent pin between the two. What’s the measurement technique? A chainsaw pitch is identified by its length by measuring its chain.
Measurements can be used to determine the length of the pitch manually. This technique involves measuring two pins’ distance from their ends. With chain markings, you can also tell what is the pitch of the chain linking link.
File size vs. Chain pitch
The size of the file is directly related to the pitch of your chainsaw’s chain. Higher-pitched teeth require a file with a larger diameter, whereas lower-pitched teeth demand a smaller file.
It is important to measure the pitch or check the manufacturer’s guide before you buy a file.
What size file do you use on a Stihl 3 8 chain?
A Stihl 3/8 chain will require a 5.2 mm chainsaw file for sharpening. The chart above shows that for a pitch size of 3/8”, you will need a 5.2mm file.
Make sure to check the pitch size of your Stihl chainsaw before selecting the correct file size.
Why does File Size Matter?
The size of the file you use to sharpen your chainsaw is important for a number of reasons.
It helps ensure that the file fits correctly onto the teeth of the blade, which provides more effective sharpening.
Using a file size that’s small in diameter will not sharpen the top edge of the cutter, while a file with a large diameter may remove the tip of the tooth.
For instance, you should sharpen the 0.324 pitch chain with a file that is 4.8mm in diameter, not 5.2 mm.
Conclusion
In conclusion, it is essential to select the correct size of chainsaw file for your saw in order to ensure maximum safety and efficiency when sharpening your chain.
Knowing the pitch size of your chainsaw will help you determine what size file you need for sharpening.
For a 3/8” pitch size, the correct file size should be 5.2mm. It is also important to follow the manufacturer’s instructions and check your chain type before selecting a file size.
By choosing the right size chainsaw file for your saw, you can make sure that the chain is safely sharpened.
