Futon Roller Small
thingiverse
I've got a vintage futon with single-sided rollers, but smaller than the ones you can find online or on Thingiverse, so I designed them using Inventor. I printed them out in ABS plastic with 40% infill and a layer height of .20mm. The rear flange measures 23mm in diameter and is 2.5mm thick. The part that fits into the futon frame's slot is 18mm in diameter and 13mm long. The end of this part has a counterbored hole for the cotter pin's head, and the through hole is 7.5mm in diameter. Maybe this will help someone else out too.
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