Dremel Multi-Max dust extraction adapter for shop vac hose
A clip-on shroud for the Dremel Multi-Max MM50 and MM40 oscillating tools that catches dust from the sanding pad and routes it to a 32 mm vacuum hose. The shroud straddles the tool nose, which is about 44 mm in diameter, with a split 45 mm collar that snaps shut and a 3 mm bridge over the blade clamp lever. From the collar a 20 mm wide duct runs 60 mm forward and ends 5 mm above the triangular pad, opening into a 31.7 mm spigot angled 45 degrees back toward the hand. Walls are 1.8 mm; print it in PETG with the spigot vertical and supports under the duct.
Dremel does not sell dust extraction for the Multi-Max, and hoses taped to the tool fall off. In SpeakCAD you give the tool nose and hose diameter, preview the shroud in the browser without paying, change the spigot for a Festool 27 mm hose in the chat, then download the STL.
Model a dust shroud with a split snap collar 45 mm inner diameter, 15 mm tall and 1.8 mm thick with a 3 mm gap and 0.3 mm clearance, a rectangular duct 20 by 12 mm inside extending 60 mm forward, ending in a round spigot 31.7 mm outer diameter and 30 mm long angled 45 degrees back.