1
Adapters & couplers
Fan adapter, 80 mm frame to 120 mm fan
A funnel-shaped shroud that fits a quieter 120 mm fan onto a case or power supply opening designed for an 80 mm fan. The small side is an 80 mm square with four 4.5 mm holes at 71.5 mm spacing, the large side a 120 mm square with holes at 105 mm spacing, and a smooth duct joins them over 30 mm with 2 mm walls. A curved rather than stepped inside transition cuts turbulence and noise, and a 1 mm lip on the small side seals against the panel. Open the ready-made model free, resize it on your phone or computer, then download a print-ready STL, 3MF or G-code sliced for your printer, free.Opening the ready-made model and downloading it as STL or 3MF are free, no card; AI changes use credits, from Maker at $7.99 a month.No printer? We print this part and ship it to your door. See its priceUpdated
2
Adjust
Change its numbers in the viewer for free, or ask the AI in the chat: wall thickness, hole size, the thing it clips onto. AI changes use 2 credits per request (1 for a quick edit, 3 for a redesign), paid with a plan from Maker at $7.99 a month.3Print
Download a watertight STL or 3MF free, with your numbers and hand edits, or G-code sliced for your printer at the same price. After an AI change the download is included in every plan (4 credits without one).
Dimensions of the ready-made model (editable)
| Parameter | Value |
|---|---|
| small flange outer size | 80 mm |
| large flange outer size | 120 mm |
| flange thickness | 3 mm |
| mounting hole diameter | 4.5 mm |
| duct length (excluding flanges) | 30 mm |
| duct wall thickness | 2 mm |
| sealing lip height | 1 mm |
| small side clear opening (inner duct dia at bottom) | 76 mm |
| large side clear opening (inner duct dia at top) | 116 mm |
Example prompt
Design a fan adapter shroud from 80 mm to 120 mm. Small flange 80x80x3 mm with four 4.5 mm holes at 71.5 mm spacing. Large flange 120x120x3 mm with four 4.5 mm holes at 105 mm spacing. Curved duct 30 mm long, 2 mm walls, 1 mm sealing lip.
Fit notes
Cases and fans come in 40, 60, 80, 92, 120 and 140 mm, and SpeakCAD builds the shroud between whichever pair you name, at the depth your case allows. Preview it in your browser, then request a shallower duct, an offset centre or a finger guard grille.
Questions people ask about a fan adapter, 80 mm frame to 120 mm fan
A funnel-shaped shroud that fits a quieter 120 mm fan onto a case or power supply opening designed for an 80 mm fan. The small side is an 80 mm square with four 4.5 mm holes at 71.5 mm spacing, the large side a 120 mm square with holes at 105 mm spacing, and a smooth duct joins them over 30 mm with 2 mm walls. A curved rather than stepped inside transition cuts turbulence and noise, and a 1 mm lip on the small side seals against the panel.
Click Open it free on this page and create a free account (no card): the ready-made model opens in your browser, on your phone or computer, nothing to install. Change its numbers in the viewer for free and download a watertight STL or 3MF free, or G-code sliced for your printer at the same price. An AI change in the chat uses 2 credits per request (3 for a redesign), and the download after it is included in every plan (4 credits without one). Start with Maker: 50 credits a month for $7.99, cancel anytime.
On this page: open the ready-made model free in a SpeakCAD account (no card), change any dimension in the viewer, then download the STL or 3MF free, or G-code sliced for your printer at the same price.
A shared STL is modelled for someone else's measurements. Here you open the ready-made model free, change it to your measurements in the viewer, then download a file sized for the part you actually own, free as STL or 3MF.
Yes. SpeakCAD slices the part on its servers with OrcaSlicer and your printer's official profile (380+ printers, including Bambu Lab, Prusa, Creality and Elegoo), and you download the G-code (a sliced .gcode.3mf for Bambu Lab printers). G-code sliced for your printer costs the same as the STL: included in every plan, free for a part you shaped by hand, 4 credits without a plan for a part with AI work in it. Pick your printer on the printers page to see its profile.
No. SpeakCAD runs in the browser on your phone or computer: the chat, the 3D engine and the live viewer load in the tab. The only file you download is the finished STL, 3MF or sliced G-code.
Print it your way
More adapters & couplers
Peak Design mobile SlimLink to 1/4-20 tripod adapterReady-made, opens free. A tripod adapter for Peak Design Everyday cases and Universal adapters that reproduces the square SlimLink mounting boss and adds a 1/4-20 socket underneath…Insta360 X3 to GoPro finger mount adapterReady-made, opens free. The Insta360 X3 and X4 use a 1/4-20 tripod thread on the base, while bike, helmet and chest mounts use the GoPro three-finger interface.Festool CT 27 mm hose to 32 mm adapterReady-made, opens free. A short adapter that lets the 27 mm anti-static hose from a Festool CT 26, CT 36 or CTL MIDI plug into 32 mm dust ports on non-Festool tools such as Makita s…Peak Design Capture clip backing plate for thin strapsReady-made, opens free. A spacer plate that sits behind a Peak Design Capture V3 clip so it clamps firmly onto thin backpack straps, seatbelt-style webbing or a 20 mm MOLLE row that…Quad Lock Pro 22.2 mm handlebar spacerReady-made, opens free. A 4 mm spacer that lets a Quad Lock Pro clamp sit on a 22.2 mm bar without crushing the sleeve.Microphone stand thread adapter, 3/8 to 5/8 inchReady-made, opens free. A threaded bushing that lets a European 3/8 inch microphone stand accept a US 5/8 inch 27 TPI clip or shock mount.