Solidoodle 2 filament rollers - remix for common bearings
thingiverse
Eobermeyer's design is commendable, but locating the required bearing size proved challenging. As a solution, I opted for 608 bearings due to their affordability and widespread availability. However, there is a noticeable issue with thin, tall cardboard filament spools; they don't roll as smoothly as wide or plastic ones, causing one to even fall off. The original design featured a 1/4" steel rod, but 608 bearings have an 8mm core. A 5/16" rod is ideal for these bearings, or you can use bushings to fill the gap. To achieve a good press-fit, sand the bearing holes. For easy customization, I've provided the SketchUp model and design specifications.
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