Passthru for 4" ducting

Print two of these to pass 4" ducting (Like the AC Infinity 4" ducting I used) through an enclosure wall for a 3D printer, laser etcher, etc…  There are grooves to put adhesive foam tape in for a better seal; the foam tape stands slightly proud of the surface to be compressed via 4x M3 screws.  The holes are interference holes for M3 screws (length will depend on your enclosure material). 

• 60' Adhesive Foam Tape 1/4"Wx1/8"D: https://amzn.to/4h8z24B
• AC Infinity CLOUDLINE PRO T4 Inline Duct Fan: https://amzn.to/3CnpWC4
• AC Infinity Flexible 4-Inch Aluminum Ducting: https://amzn.to/4h63zQv
• 4" Holesaw for plywood or acrylic: https://amzn.to/4ga3NVG

This was used in conjunction with a 7.5" HEPA filter holder:

7.5" HEPA Filter Enclosure for AC Infinity Cloudline PRO T4 by Aviator4x4 | Download free STL model | Printables.com

Print Profile: 

I printed these out of PLA with 3 walls, 3 top shells, 3 bottom shell, 15% grid infil and they came out pretty much one solid piece of plastic.  After 5mo of use, I'm uploading this as a success.

No supports were necessary.  Overall, fairly easy/benign print.

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