Air pump to Aerosol air refill adapter
thingiverse
My half-full can of WD-40 had run out of air pressure, but instead of scrapping the entire product, I opted to refill the can with a precise 90 PSI of compressed air. To facilitate this modification, I've included the Fusion 360 file for you to easily adjust the nozzle size of the aerosol can to your desired specifications. Currently, it's set at a diameter of 3.4mm, which barely fit my bottle – I suspect either shrinkage or printer limitations might have been at play.
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