Enter the largest and widest spool you use — Ø200 × 70 mm by default — and get a roller stand: the spool rests on its rims on two rollers turning on 608 bearings, never touching the hub hole that varies most between brands, and a guard bar stops a nearly empty spool from climbing off. Or get a pair of wall brackets for a rod. The rollers sit at the geometry measured on Lattenberg's popular holder.
The real generator runs in your browser: set the parameters, then download STEP or STL. Nothing to install, no sign-up.
The first open downloads the CAD engine (about 20 MB).
Each parameter below rebuilds real geometry on every change — this is parametric CAD, not a scaled mesh.
| Parameter | Default | Range | What it does |
|---|---|---|---|
| Holder typeTYPE | rollers | rollers / wall | A roller stand, or wall brackets for a rod. |
| Largest spool diameterSPOOL_D | 200 mm | 120 – 300 | 1 kg spools are about 195–203 mm, 3 kg about 250, 5 kg 300. |
| Widest spoolSPOOL_W | 70 mm | 40 – 170 | 1 kg spools are 57–69 mm wide. |
| BearingBEARING | 608 | 608 / 626 / 6001 | Two per roller, pressed into its ends. |
| Bearing pocket fitBEARING_FIT | 0.2 mm | -0.1 – 0.4 | Added to the bearing's outside diameter. |
| Spools side by sideCOUNT | 1 | 1 – 4 | Bays in one stand. |
| Rod diameterROD_D | 22 mm | 8 – 32 | The guard bar (rollers) or the spool rod (wall). |
| Rod hole fitROD_FIT | 0.2 mm | 0 – 0.6 | Added to the rod diameter. |
Every parameter can go in the page's link, so one link opens exactly the part you want. Example (Roller stand for 3 kg spools (Ø250 × 110)):https://www.forgent3d.com/en/generators/spool-holder-generator?SPOOL_D=250&SPOOL_W=110
STEP AP214 in millimetres, exact B-rep — it opens directly in SolidWorks, Fusion, FreeCAD, Onshape or Inventor, and goes straight into a CNC quote form. STL for the slicer is one click too.
| This generator | Typical online STL generator | Vendor CAD library | |
|---|---|---|---|
| Any size within the range | Yes | Yes | Catalog sizes only |
| STEP with exact surfaces | Yes | Usually an STL mesh only | Yes |
| Changes the sliders don't cover | “AI edit” on the page | No | No |
| Account needed to download | No | Usually no | Often |
Every parameter is a link parameter; the link below opens the example part. ChatGPT, Claude or any assistant can write one like it from the parameter list (names, units, ranges) at: parameter list (JSON)
Example: https://www.forgent3d.com/en/generators/spool-holder-generator?SPOOL_D=250&SPOOL_W=110
Press “AI edit” in the generator and say what to change — a keyway, holes, a different shape. The AI edits the part's model.py and it rebuilds in your browser, with undo. A few edits a day are free without signing in; to keep the result or go further, copy it into your models and continue with the AI agent.
Edit with AI →For bigger changes, several rounds, or a part you want to keep: copy it into your models (free account). The Forgent3D AI agent reads the model.py, edits it, rebuilds it and checks the result itself.
Copy and continue with the AI agent →For one roller stand: four bearings (two per roller), two threaded rods with nuts as axles (M8 for 608), and a rod or dowel for the guard bar. Printed axles were left out on purpose — users of printed-pin holders report them breaking.
The popular wall-rod brackets are printed in PETG; roller stands are commonly printed with 4–5 walls and 15–25 % infill, and one maker's 3-wall, 20 % holder broke straight away. Print the wall brackets on their side as laid out: printed upright, the layers can snap under a full spool's weight.
The stand carries everything from the largest spool you enter down to a derived smallest one (about Ø150 at the default Ø200), so a 1 kg spool also fits a 3–5 kg stand. For 250–500 g mini spools, set the spool diameter to the mini size.
Open https://www.forgent3d.com/en/generators/spool-holder-generator?SPOOL_D=200&SPOOL_W=70 — two side frames and two rollers with 608 bearings in their ends; a Ø200 × 70 spool rests on its rims at the geometry measured on Lattenberg's widely printed roller holder. You add four 608 bearings, M8 threaded rod with nuts for the axles and a Ø22 rod as the guard bar.
Yes: https://www.forgent3d.com/en/generators/spool-holder-generator?TYPE=wall&ROD_D=16 gives two brackets for a 16 mm rod, its centre far enough from the wall for a Ø200 spool. Pick a rod that passes your spools' hub holes — 1 kg spools have 50–72 mm holes, but 5–8 kg spools only 32–36 mm.
Yes. Models you generate and the STL / STEP files you export are yours: print them, sell the prints, or use them in a product. No attribution to Forgent3D is required.
Already have your own .scad file? Convert OpenSCAD to STEP → · Preview it in the browser →
