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Ultra-low friction spool holder — image 1
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Ultra-low friction spool holder

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Ultra-low friction spool holder that fits a Rubbermaid 21 cup container.

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An ultra-low friction spool holder that fits inside a Rubbermaid 12 quart container.  Two greaseless 608 bearings are required.

The frame is designed to mount to this base:
https://www.printables.com/model/614239-rubbermaid-dry-box-filament-mounting-base

A PC4-M6 grommet can be used fit a PTFE tube to the Rubbermaid container.

The cylinder with tapered ends is constructed using basic shapes, including a negative volume, in PrusaSlicer.  I am not sure if it will load OK in other slicers.