Self feeding filament pelletizer REMIX

UPDATE 2025-April-26: 
Improved Version 2 available

After pelletizing a significant amount of filament, I identified several opportunities for improvement. As a result, I’ve created Version 2 of the pelletizer remix.

First of all, thank you for your feedback — I’ve taken it into consideration as well.

Improvements in Version 2 compared to the first Remix:

• The small gear has been redesigned so that it can now be secured with at least one grub screw, with the option to add a second one.
• Consequently, the endplate also had to be modified, as I wanted to retain the second bearing for the router bit.
• Due to this change, the shaft length for attaching the drill may no longer be sufficient. To solve this, I’m now using a universal joint to connect the drill.
• After pelletizing dozens of meters of filament, the edge where the filament is cut began to wear out. To address this, I added a replaceable part (anvil) that can be swapped easily once worn, and can be printed from a harder material. This allows you to keep the rest of the pelletizer in PLA.
• I printed the anvil from polycarbonate (PC), and so far, it shows no signs of wear.

Please note: This remix was designed specifically for 1.75 mm filament.
If you want to pelletize 2.85 mm filament, please use the original design or a different remix.

Printing instructions

I recommend printing with thick walls. I've used PLA with 5 walls. An infill of 30% is recommended too, just to ensure structural integrity.

Required Hardware for this remix → version 2 ← (differs from the original design and version 1)

The following hardware was used for the build, variations are ok, but may need modification of the parts:

• 19mm router bit: (German source) https://www.contorion.de/p/stier-buendigfraeser-schaftdurchmesser-8mm-c10000035?diameter_mm=19&working_length_mm=25&simple_sku=74934771  (comes with a 698 bearing. I case you are using a different router bit, you will probably need a 698 bearing)
• 608 bearing x 1 OR 698 bearing x1 (second bearing for the router bit)
  • There are two versions of the end-plate-a part available. Since the 698 bearing is narrower, I recommend using this version. However, you’ll most likely have a 608 bearing lying around anyway.
• RM115 bearing x 5: https://amzn.to/3NjZtYm
• MK7 hobbed gear: https://amzn.eu/d/fuAPUCb
• M3 Inserts x 8 (7 x for center plate, 1 x for small gear)
• M5 x 20mm bolt x 1 (idler spring)
• M5 x 60mm bolt x 1 (large gear to hobbed gear)
• M5 x 25mm bolt x 1 (medium gear)
• M5 lock nuts x 2
• M5 washers x 6 (possibly more if you need to use them as spacers)
• M3 x 20mm bolts x 4 (end-plate-A through to centre plate)
• M3 x 12mm bolts x 3 (end-plate-B through to centre plate)
• M3 washers x 7
• M3 grub screws x 1 (small gear to router bit shaft)
• Power drill to drive the pelletizer
• 8mm universal joint (optional)
• 8mm bolt to attatch the drill (optional)