KOTTO Solder Fume Extractor 4-inch Duct Adapter

If you're into 3D printing and electronics, then you're likely into soldering. The KOTTO solder smoke absorber / fume extractor is one of the most popular desktop fans on Amazon. However, it only comes with a carbon filter, the chemical air flows out the back. If you have a 4-inch exhaust duct (as some folks have installed), then wouldn't it be great to hook this extractor up to the duct? That's what I've built!

This is a two part print. The first part ("Adapter Plate") attaches to the back of the KOTTO fume extractor. The second part ("duct ring") attaches to the end of your 4-inch flex exhaust hose. Then attach/detach to each other as needed!

Instructions for KOTTO:

1. Unplug the KOTTO.
2. Use a #3 allen wrench to carefully unscrew the four screws from the back of the KOTTO. Be careful not to drop the plastic collets that surround the screws. They can be re-placed, but it's annoying. Also be aware that one of the screws holds the grounding wiring.
3. Place the adapter plate over the wire fan grate and replace the screws. Be careful not to over-tighten the screws as it may damage the plate. Make sure the screws pass back through their collets, and that the screw closest to the power switch has the grounding wire attached (do this screw first to have access).