Air Compressor Muffler / Silencer

thingiverse

This is a muffler for an air compressor. We have a compressor at the office that is quite loud. Did some research and found you can buy these for around $40 US. Designed this to be similar. The photo is of the first version, the stl files are of the next version; didn't expect as much vibration as there was. Once we attached it the noise was considerably less. The assembled canister (two Muffler Bodies and one Muffler Plate is put in line with the intake on your compressor with a 3/4 1/2 inch NPT pipe fitting. I've attached the Fusion 360 file archive as well so you can make any needed modifications easier. I printed all three pieces together with the NPT threads nearest the plate. It should print okay with no supports due to the chamfered edges. Update 6-25-19: Changed the registration marks to be a little deeper to allow for easier assembly. Print Settings Printer: Folger Tech Prusa i3 Rafts: No Supports: No Resolution: .2125 Infill: 15% Notes: May need to print a little more stoutly than we did. The vibrations are considerable. Post-Printing Assembly Take one muffler body and apply acetone (if using ABS to print) to all the top surfaces. Place the muffler plate in line with the marks on the muffler body. Then do the same to the other muffler body, keeping the marks in line with each other. Clamp the whole thing together. You may need to apply a little acetone or sealant around the seam to ensure air tightness.