How to clean a circular saw

How to clean a circular saw

Circular saw maintenance requires a thorough cleaning after finishing each job, as well as lubrication of its moving parts. This machine has a load-bearing structure inside which an electric motor is installed that drives the rapidly rotating disc blade. The structure can consist of a bench without support legs and therefore to be fixed to a worktop or with integrated support legs that make the machine totally independent. The drive of the blade is usually “direct” with connection to the motor, but some saws have pulleys and a rotation drive belt. The blade exiting the upper plane can be adjusted in height by moving a handwheel or a lever, but it can also be angled, usually up to 45 degrees, for bevel cuts. A protective cap above the blade prevents you from approaching it from above, offering greater safety. The upper plane has a guide parallel to the blade that allows making perfectly straight cuts. The start-stop switch is inserted on the machine body.

How to clean a circular saw

What you’ll need




Step 1: Cleaning 

The basic operation which must always be carried out at the end of any work is cleaning the machine from any dust and chips produced while the circular saw was cutting. First use a brush to remove the larger pieces, then use a vacuum cleaner with good power, equipped with a rather narrow nozzle that can fit in confined spaces. You can also use a compressed air gun, but care must be taken because this operation can cause the residue to travel even deeper into the saw’s mechanisms. Some circular bench saws can be connected to a vacuum cleaner that removes the dust during cutting. In this case, the relevant collection tank (or bag) must also be emptied. Depending on the frequency of use, the saw should periodically be opened (usually by turning it upside down and removing the base-grate) to vacuum inside as well. It’s also best to remove the blade coverings in order to access the blade body and carry out the necessary cleaning.


Step 2: External lubrication 

There are several moving parts in a circular saw which must be properly lubricated after all the chips and dust have been removed. We perform all this lubrication using WD-40 Specialist Dry Anti-Friction PTFE Lubricant. Use this product to lubricate the sliding grooves of the side guides present above or on the side of the work surface and the handwheel or lever system that lets you raise or lower the blade with respect to the table. The sliding mechanism of the side saw-carriage (if present) must also be lubricated. Pay particular attention to the cleaning and subsequent lubrication of the blade tilting system (usually operated with a handwheel), which often operates on a rack. Also externally lubricate the sliding holes of any extendable surfaces.


Step 3: Internal lubrication 

If the structure of the saw allows, access it inside to carry out further useful lubrication after having entirely removed any chips or dust. First treat the blade lifting mechanism, which usually has worm screws. This is a very delicate part that must be cleaned and lubricated with great care. Lubricate the motion drive system that rotates the blade axis with WD-40 Multi-Use.


Step 4: Blade and splitter wedge

Remove the blade by working on the locking nut with the two keys provided, both to lubricate the threaded axis and to remove any signs of burnt wood or resin from the blade body using Dry Anti-Friction PTFE Lubricant and a cloth. Check the teeth of the blade one by one to make sure that none are broken or twisted. If the blade’s teeth are damaged, the blade must be replaced. Check the cutting splitter wedge immediately behind the blade to make sure that it is perfectly perpendicular to the work surface and, in any case, on the same plane as the blade. When reassembling the blade, use a digital goniometer to check that its angle relative to the work surface is exactly that which is indicated by the graduated scale located below the worktop. The best circular saws have a micrometric mechanism with which this inclination can be adjusted.


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How to clean a circular saw

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