ROLLER RING | Stable Multi-mount Parametric Filament Spool Holder

The spool roller is the ideal platform for simple, low cost, light, convenient and effective filament spool mounting. It is easy to build with minimal hardware, requires minimal effort to mount and dismount spools and takes up minimal space. This design was motivated by the basic simplicity and efficiency of the roller configuration while trying to address the inherent weaknesses in existing designs.
**Improvements and Key Features**
- Fully parametric allowing complete control of all options from minimal lightweight to reinforced designs supporting virtually any spool size
- Ring structure provides better stability with minimal filament and if using ABS, suffers less print warping compared to straight edges
- Optional retainers prevent spool dislodging when weight reduced and allow mounting at any angle
- Inner flanges on bearing holders negate the need for washers on the base
- All parts can be printed apart from bearings
- Spools can be changed quickly without