Single Folded Ascender Extruder (Worm Gear Extruder)

15:1 1M worm gear extruder. Remix of annex engineering double folded ascender.
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updated July 24, 2025

Description

PDF

https://github.com/Annex-Engineering/ANNEX-Engineering-License-Agreement
Please follow the license agreement above.

Mostly putting it here for my reference/people to see. Used my spare parts so it's not easy to build your own. You probably need to mod this to use different bearing/roller. Does use standard bmg gear. 

  • 2 od 8mm and 1 od 9mm bearings for the main shaft
  • 1mm spacer for the main shaft
  • 13mm roller from titan extrder

Overall cost is around $20 from aliexpress. 

  • bmg - $4
  • worm gear set - $12
  • shaft - $5
  • also need additional bearings etc

When assembling, move the stepper up and down so that there is a tiny bit of slack (as little as possible). When fully pressed, mine started binding. Not sure if it's gear quality or not. Also apply lots of lube. Put a wash between stepper and mount on one side to fine tune as needed.

Model origin

The author remixed this model.

Differences of the remix compared to the original

  • shape is different
  • 1:15 single fold as opposed to 1:40 double fold
  • level position is different
  • designed for my modded eva3

License