Aerosal Can Pressurizer

thingiverse

Aerosol cans often lose their propellant long before the contents go bad. This appears to be particularly true for lubricants like WD-40. You can find numerous videos and web pages that describe how to re-pressurize an aerosol can using compressed air from an air compressor. Although the original propellant was likely something other than air, and in some cases air may degrade certain materials over time, this doesn't matter because the alternative is discarding the can. This simple 3D-printed part provides a precise fit between the stem on the aerosol can and the nozzle of your air compressor. Since each can has a different diameter stem and each air compressor nozzle is distinct, I designed this part using Fusion 360 with parameters to accommodate these variations. Therefore, all you need to do is enter the dimensions of your stem and air compressor nozzle into the Fusion 360 parameter dialog, export the STL file, and print the part. I used PETG for added strength compared to PLA. I set infill to 100% because it enhances the part's durability and also because the walls are thin enough that infill doesn't contribute significantly. When using this adapter, hold the can upside down so that as you pressurize it, minimal contents will escape. The stem inside the can extends to the bottom, so if you turn it upside down during the pressurization process, any air that escapes won't carry too much of the can's contents through this adapter, preventing spills. Recharging the can may occasionally be a bit messy.