Modified RSE2 (6mm bowden coupler, compatible with vibration damper, ...)

by michaelni, published

Modified RSE2 (6mm bowden coupler, compatible with vibration damper, ...) by michaelni Apr 6, 2017

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This is a modified version of Kistenschiebers RSE-2. Adapted to the tevo tarantula and likely many similar printers. The original RSE-2 can be used with the tarantula but did not fit the way i wanted to mount it where the original extruder was.

The changes i made:

  • 5mm thicker mount to avoid colliding with the x carriage as it moves up
  • 10% bigger filament input hole (was an attempt to correct that the filament gets stuck on filament change) but it seemed not enough, i still needed to drill it out like in the original
  • The most open top plate was modified to prevent the plug from falling out
  • Top plate merged with main part, that way the stepper can optionally be attached with a vibration damper which on each side uses only 2 M3 screws. Also 1 part less to print
  • The filament output was changed to fit a M6 coupling as used in the tevo tarantula as well as allowing the 4mm/1.75mm bowden tube to be inserted all the way avoiding the need for a seperate 3mm/1.75mm inlay

RSE2_Plug.stl and RSE_2_idler.stl are unmodified.

For a list of non printed parts needed see kistenschiebers original RSE2 (minus PTFE inlay and M5 pushfit as well as 1 M3 screw less if wanted. The M6 pushfit/coupling and spring from an existing extruder can likely be reused if you have one)

I made these changes with blender before realizing that there was a scad file :)
Hopefully this is useful to someone.

License is CC-BY-NC because the original RSE2 is under that.

Print Settings


Tevo Tarantula






0.4mm nozzle, 0.2mm layers or finer


I used 20%


I left it in the same orientation as the original but to print it, its recommended to rotate by 90deg on the y axis. That way it prints fine without support. I printed mine in ABS


If you use the extruder with a vibration damper and a strong spring then it may be that the drive gear is pushed against the extruder. This can be easily resolved with a round file. You can check with a piece of paper if the gear is pushing against the extruder.
The input hole for the filament may also need to be cleaned up with a drill if the filament doesnt smoothly feed through in both directions (especially when changing filaments)

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Thank you! This is awesome, I have been looking for a decent flex extruder for a long time!

Quick question. Do you have to change any settings in your slicer from the old extruder? I can extrude from the printer menu fine, but when I try to print from a file, no filament comes out.