Things You'll Need:
- Circular saw blade Vise Flat or three-sided diamond file Open-ended box wrench Chalk
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Step 1
Remove the blade from your circular saw. This generally requires the use of an open-ended box wrench, although newer models may have other blade releases. Check your owner's manual.
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Step 2
Place your blade into a vise. Close snugly, but do not over-tighten.
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Step 3
Place a chalk mark at the top most blade point so you will know when you have gone all the way around the blade. Notice that every other blade point has a bevel on the side facing you. Hold your file (a diamond-file if you are sharpening a blade with carbide tips) at a 20-degree angle and stroke it lightly along the bevel of the first tip--stroke up, down, up and down. Four nice even strokes should be enough.
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Step 4
Skip a blade point and repeat the same process, stroking your file four times on the beveled edge, sharpening the point.
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Step 5
Turn the blade over when you have gone all the way around the blade, sharpening every other point. You will know when you are done because you will come back to your chalk mark. On the other side of the blade, put another chalk mark and do the same thing as you did to the first side, starting with the top most point with a beveled edge.
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Step 6
Complete filing the tips of each beveled tooth. Now place the file between the two top most teeth, with the flat side of the file against the leading edge of one of the points. Run your file back and forth just one time across the front edge of the tip of the blade point. Do this to all of the tips, and your blade will be sharpened.
