Harbor Freight Central Pneumatic 40400 Air Compressor Air Filter Housing

thingiverse

This part is a rework of Air Filter (compressor) by poire, thank you: https://www.thingiverse.com/thing:2802825 Threaded attachment snapped off the original filter, requiring replacement. From poire's model, I removed the threaded section and added the correct size for the Harbor Freight Central Pneumatic 40400 air compressor. The threads measure 19.2 mm (0.756 inches) outer diameter, with a thread pitch of 1.5 mm. Unable to determine what formal screw size this is. Used this library by marcaxi to make the threads, thank you: https://www.thingiverse.com/thing:31363 Printed the other half of poire's original filter design and discovered they don't fit together well at the joining lip. Consider printing the other half (not in this design) at a 2% size reduction in both cartesian directions to see if it will fit. Printed at 0.3 mm layer height with vertical supports, using PETG material, confident that anything else would work. The old filter I replaced had a wing nut for 10-32 threads. Used a 1.5 inch 10-32 screw for the replacement.