How to Clean a Diamond Chainsaw File (The Right Way)
Diamond chainsaw files are essential for sharpening tungsten carbide chainsaw chains. Over time, metal dust, resin and oil can build up on the surface, reducing cutting performance.
Cleaning your file takes only a few minutes — and keeps it sharpening like new.
Why Diamond Files Need Cleaning
Diamond files don’t clog like standard steel files, but they do collect:
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Tungsten carbide dust
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Chain oil
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Resin and gum
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Fine metal particles
This buildup can cause:
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Slower cutting
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More strokes needed per cutter
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Less precise sharpening
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Shortened file lifespan
A quick clean restores cutting power instantly.
How to Clean a Diamond Chainsaw File
1. Brush the File
Use a nylon or brass brush and scrub along the grooves.
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Nylon = safe and gentle
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Brass = stronger for heavy buildup
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Avoid steel brushes (they can damage the coating)
2. Soak in Warm Soapy Water
Place the file in warm water with a few drops of dish soap.
Soak for 5–10 minutes to loosen:
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Resin
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Oil
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Dust
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Metal fragments
Brush again after soaking.
3. Rinse and Dry Thoroughly
Rinse with warm water and dry completely.
Moisture left behind can cause rust under the diamond coating.
4. Deep Clean for Heavy Resin
If the file is heavily gummed:
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Spray with isopropyl alcohol, or
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Lightly spray WD-40
Let sit for one minute, then wipe and brush.
Avoid acetone or harsh solvents — they can weaken the diamond bond.
5. Store Correctly
Keep your diamond files:
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Dry
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Clean
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Wrapped or stored in their case
Optional: wipe lightly with oil if storing long-term.
How Often Should You Clean Your File?
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After every sharpening session
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Whenever the file feels slow
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More often if chain is very oily or dirty
This ensures maximum performance and longest lifespan.
Need the Right File for Carbide Chain?
Standard steel files won’t sharpen tungsten carbide.
You need a diamond-coated file specifically designed for carbide cutters.
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Final Thoughts
Keeping your diamond file clean is the easiest way to improve sharpening accuracy, extend file life, and maintain peak performance of your carbide chain.