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Adapters & couplers
Filament spool hub adapter for 52 mm bores
A pair of hub inserts that centre a filament spool with a large 52 mm bore on a slim holder rod so it turns smoothly instead of wobbling and tangling. Each insert is a cone with a 51.6 mm shoulder, a 12 mm spigot that presses into the spool bore and a central hole for your rod, commonly 8, 10 or 12 mm, with 0.3 mm clearance. Six radial ribs keep the cone rigid, and a chamfer at the rod hole eases fitting. Print with the flat shoulder down. 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
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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 |
|---|---|
| spigot outer diameter (fits 52mm bore) | 51.6 mm |
| spigot length | 12 mm |
| shoulder flange diameter | 70 mm |
| flange thickness | 3 mm |
| rod hole diameter (8mm rod + clearance) | 8.3 mm |
| chamfer size on hole edges | 1 mm |
| number of ribs | 6 |
| rib thickness | 2 mm |
Example prompt
Create two spool hub inserts for a 52 mm spool bore on an 8 mm rod. Spigot diameter 51.6 mm, 12 mm long, shoulder flange 70 mm diameter, 3 mm thick. Central rod hole 8.3 mm with a 1 mm chamfer. Six ribs 2 mm thick, 45-degree inner cone.
Fit notes
Spool bores and holder rods differ per brand and printer, so SpeakCAD draws the insert to both measurements you give, avoiding the trial and error of downloaded hubs. Preview in your browser, then ask for a bearing pocket, a cardboard-spool grip lip or a wider shoulder.
Questions people ask about a filament spool hub adapter for 52 mm bores
A pair of hub inserts that centre a filament spool with a large 52 mm bore on a slim holder rod so it turns smoothly instead of wobbling and tangling. Each insert is a cone with a 51.6 mm shoulder, a 12 mm spigot that presses into the spool bore and a central hole for your rod, commonly 8, 10 or 12 mm, with 0.3 mm clearance. Six radial ribs keep the cone rigid, and a chamfer at the rod hole eases fitting. Print with the flat shoulder down.
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.
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