# 3D-Fuel 4 kg spool

> What are the dimensions of the 3D-Fuel 4 kg spool?

- Category: 3D printers & filament › Filament spools
- Kind: Modern device
- Basis: Manufacturer specifications (3D-Fuel)
- Page: https://xemstudio.com/objects/3d-fuel-4-kg-spool/ · JSON: https://xemstudio.com/api/geometry?object=3d-fuel-4-kg-spool · Plain text: https://xemstudio.com/objects/3d-fuel-4-kg-spool/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 298.5 | 298.5 | 101.6 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- The 3D-Fuel 4 kg spool measures 298.5 mm across the flanges, 101.6 mm wide, with a 52.4 mm hub hole, as published by 3D-Fuel.
- The file is a solid envelope cylinder at the outer diameter and width with the hub hole through it; flange thickness, core diameter, ribs and windows are not modelled.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

## Sizes

| dimension | value |
|---|---|
| Outer (flange) diameter | 298.5 mm (11.75 in) |
| Width | 101.6 mm (4 in) |
| Hub hole diameter | 52.4 mm (2.06 in) |
| Published inch values | 11.75 in × 4.0 in, 2.063 in hole |
| Empty spool weight | 920 g |
| Filament capacity | 4 kg |

## Where the files are

- 3D-Fuel: [What are the sizes and weights of your spools?](https://support.3dfuel.com/hc/en-us/articles/360059449374-What-are-the-sizes-and-weights-of-your-spools) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/3d-fuel-4-kg-spool/index.json

- 3d-fuel-4-kg-spool-spool: [STEP](https://xemstudio.com/files/hardware/3d-fuel-4-kg-spool/3d-fuel-4-kg-spool-spool.step) · [STL](https://xemstudio.com/files/hardware/3d-fuel-4-kg-spool/3d-fuel-4-kg-spool-spool.stl) — Spool envelope Ø298.5 × 101.6 mm with a Ø52.4 mm hub hole (flanges and core not modelled)

## Questions

**What size is the 3D-Fuel 4 kg spool?**

298.5 mm outer diameter, 101.6 mm wide, 52.4 mm hub hole (11.75 × 4 in, 2.06 in hole).

**Does the 3D-Fuel 4 kg spool fit a Bambu Lab AMS?**

Bambu Lab lists the AMS HT for spools 197–202 mm in diameter and 50–68 mm wide; at 298.5 × 101.6 mm this spool is outside that range on paper, so plan on an adapter or an external holder.

## Fits with

- [Filamentive 300–500 g cardboard spool](https://xemstudio.com/objects/filamentive-300-500-g-cardboard-spool/)
- [Filamentive 750 g cardboard spool](https://xemstudio.com/objects/filamentive-750-g-cardboard-spool/)
- [Filamentive 1 kg cardboard spool (narrow, from April 2025)](https://xemstudio.com/objects/filamentive-1-kg-cardboard-spool/)
- [Filamentive ReFill coil (for Bambu Lab reusable spool)](https://xemstudio.com/objects/filamentive-refill-coil/)