How to Maintain Saw Blades
In most DIY-Workshops the table saw, circular saw, mitre saw and so on, are the main tools you need. In almost every wood project at least one of these tools is used. However, very few handymen and hobby woodworkers maintain their saw blades. Whereas it only needs a little effort to significantly increase the service life of a circular saw blade. Care not only includes sharpening but also very simply cleaning the flanks and teeth.
Deposits tend to stick to circular saw blades, especially after cutting resinous softwood. The liquid tree resin sticks to the saw blade and mixes with the fine dust of the freshly sawn wood. By neglecting to thoroughly clean the saw blade, the resin and wood mixture hardens and forms a rough surface on the sides of the saw blade. When the blade is used the next time, these hardened deposits causes more friction and so more heat on the cutting edge. The result is unsightly burn marks on the wood, which later have to be tediously sanded out again. This annoying phenomenon can easily be avoided by regular cleaning the saw blade. All you need is the lid of an old paint bucket, a wire brush and some dilution. Of course the first step is to remove the saw blade from the circular saw as described by the manufacturer. And naturally the table saw must be disconnected from the power supply before that! So please unplug the machine and leave it disconnected from the power supply until the cleaning is complete and the saw blade has been re‐installed!
Now place the dismantled saw blade on the lid of the paint bucket so that it is in the centre of the raised edge. About 100 ml of dilution is more than enough to clean one blade. Pour the dilution over the saw blade and let it stand for a few minutes. Now you can remove the deposits with a wire brush. Take about five minutes per side of the saw blade to brush it off properly. If you only use the dilution to clean saw blades, you can use a funnel to return the excess dilution to the can and use it again the next time. Your saw blade should now shine again and be hardly distinguishable from a new saw blade.
Alternatively, if you don’t have a thinner at home, a regular household cleaner can help you with cleaning saw blades: Oven spray. Here you spray it simply onto both sides of the blade and remove the dissolved dirt with a fine brush and water. But be careful: The oven cleaning spray is best used outside or only with sufficient fresh air. Also don’t breath the vapours in directly.
Which oil to use to maintain the saw blade?
To avoid rust, you should oil each saw blade after cleaning. Suitable are here for example universal oil or camellia oil.
Buy a new saw blade
Option one is to simply buy a new saw blade. However, as we are DIY enthusiasts and like to repair and recycle things, we postpone the purchase of a new blade to a later date.