This is a soldering fume extractor designed for a 12v 120mm case fan & can be used with or without the flexible tube (pictured). It's designed to mount onto a lamp arm but could be mounted onto any base.
The duct adapter reduces from 120mm to 85mm diameter sleeve to suit the flexible downpipe available from Bunnings in Australia for $9.90 AUD.
Duct & Shroud:
Layer Height 0.2mm
Number of shells 2
Feedrate 90 mm/s
Travel Feedrate 150 mm/s
Print Temperature 230c
This was printed with black 1.75mm PLA on mbot Rep2.
1) Bolt the duct to the mount with a 3/16" countersunk bolt with a wingnut & rubber washer.
2) Bolt the Shroud & Duct to the Fan with 4x 3/16" countersunk bolts.
3) Cut off the standard rectangular connections of flexible downpipe hose with an x-acto knife to leave the tapered round end.
4) Slip the flexible hose into the 85mm diameter duct connection.