I got annoyed by a couple of damaged or warped filament spools I have that wouldn't work with my other various rollers, so I designed this instead. Uses plain skateboard/inline bearings (608) and is sized for the spools I have around, but can be altered for other bearings and dimensions. I made the "hub" fit the smallest-diameter spool I had (about 15mm diameter center hole), and then did spacers to fit other dimensions.
Uses pins.scad from this library to hold the bearings:
http://www.thingiverse.com/thing:10541
| flat_roller_hub.stl | 521.9KB | |
| flat_roller_track.stl | 180.7KB | |
| spacer27.stl | 90.5KB | |
| spacer55.stl | 184.2KB | |
| spool_flat_roller.scad | 4.6KB |
