Quick Change Universal Spool Holder
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**Description**
This is a universal spool hub/holder designed to make spool change-outs quick and easy.
- **Three "bolt" lengths available:** Original, Large, Extra Large
- Accommodates spools with a center hole of 50mm - 65mm
- Print the "Enbiggener" to expand this size up to 85mm
- Other sizes available using parametric Fusion 360 file included
- Can be used with or without 608 bearings
- Designed with printability in mind - no supports required
Changing the spool is a breeze as it is essentially a giant nut and bolt with cone-like faces, and the nut threads on very quickly due to the coarse thread pitch. Once the hub is mounted on the spool simply slide in a piece of 5/16" or 8mm rod.
Have spools with a inner diameter greater than 65mm? Instead of customizing and printing an entirely new spool holder just print the "enbiggener" instead (2x). This expansion sleeve slides over the "nut" and "bolt" pieces - increasing the capacity up to 85mm.
**Mounting Options**
Personally, I have an Ikea ALGOT wall shelf above my printer and I just have the 5/16" rod cantilevered out from one of the [support brackets](https://www.ikea.com/ca/en/catalog/products/00218546/#/20218545) (it fits inside the bracket itself). The "nut" part faces the side away from the shelf which lets me change the spool without removing the rod.
There's also a few designs out there for this spool holder to allow for free-standing and mounting to an i3 style printer frame. Here are a…
