Air Compressor Muffler / Silencer

thingiverse

We designed this muffler for an air compressor that's extremely loud. After researching and finding that you can buy these for about $40 US, we set out to create one ourselves. The photo shows our first version, while the STL files are of a revised design; we didn't expect such significant vibration but once attached, the noise decreased dramatically. The assembled canister consists of two Muffler Bodies and one Muffler Plate put in line with the intake on your compressor using a 3/4 1/2 inch NPT pipe fitting. I've included the Fusion 360 file archive so you can make any necessary modifications more easily. We printed all three pieces together, placing the NPT threads closest to the plate. They should print without supports due to their chamfered edges. Update: On June 25th, we revised the registration marks to be a bit deeper for easier assembly. Print Settings: Printer: Folger Tech Prusa i3 Rafts: No Supports: No Resolution: .2125 Infill: 15% Notes: The muffler may need to be printed more robustly than our version due to the considerable vibrations. Post-Printing Assembly Instructions: Take one Muffler Body and apply acetone (if using ABS) to all its top surfaces. Place the Muffler Plate in line with the marks on the Muffler Body, then do the same for the other Muffler Body, keeping the marks aligned. Clamp everything together. You may need to apply a little acetone or sealant around the seam to ensure air tightness.