PolyDryer Filament Roller Mod Ver2

This is a filament roller mod designed to improve the filament feed for the Polydryer.

The original roller has rough pipe edges that rotate and rub against the inner wall of the case, which prevents smooth rotation. To solve this, I added a part that secures the pipe so it doesn’t rotate, allowing the roller with the mounted bearings to spin freely.

Based on various suggestions from comments on Version 1, I created Version 2 with the following improvements:

Separated Roller and Tapered Section The main roller body and the tapered section are now separate, with the tapered part made thinner. This change addresses feedback about the Bambulab spool width compatibility.

Selectable Taper Sizes The tapered section now comes in three diameter options: 23mm, 26mm, and 30mm. This allows compatibility with an additional desiccant mod, following suggestions about interference.

Improved Pipe Locking Mechanism To enable smoother rotation, the roller side no longer contacts the Polydryer’s inner wall, and only the inner ring of the bearing is secured. Special thanks to @DETMan on Printables for advice and a sample model!

Thank you all for your feedback!

If the fit is too tight or too loose, try adjusting the flow rate and test again. Please proceed at your own risk.

This is a review video of the PolyDryer that I posted. I explain this modification starting from 19:32. The video is only in Japanese, but I hope you find it helpful.