Kuro's Compact Bowden Geared Extruder

Compact bowden geared extruder for use with MK7 drive gear and NEMA17 motor.

3D printer parts and enhancements


A free software license that requires that all work based on this must also be free software as in freely remixable and sharable by anyone under the same license but may be used commercially.

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Kuro's Compact Bowden Geared Extruder

UPDATE: gears should fit each other with less slop now.

Designed to fit a Rostock Mini, this design can be used in other printer adjusting the support, that is fixed on two of the extruder motor bolt holes.

It uses a MK7 drive gear and 625zz bearings.

The only thing I didn't really like on this extruder is the use of a 3/16" nut to fix the PTFE. It's troublesome to build and I really prefer using the press fits.

It's recommended to fit the 3/16" nut and then fixing the PTFE in the extruder the first thing, or you will have some bad time fixing it after assembly of the extruder.

Materials and methods

Printed Parts (minimum)
- Extruder body
- Idler
- Gears

Hardware (minimum)
- 2 springs for idler tension
- 3 625zz bearings
- 1 MK7 drive gear
- 1 M5x40mm hex headed bolt
- 1 M5x30mm bolt
- 2 M3x35mm bolts
- 1 M3x20mm bolt
- 2 M3x10mm bolt
- 1 3/16" nut
- Assorted nuts and washers



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B1e5d2d82881c6c179ef909349555ce2?default=blank&size=40chantling added this to the 3D Printing collection ago
874784a15a1033fc2a3af9666035a597?default=blank&size=40Ε tefan β€œympi” HΓ­rei added this to the 3d collection ago
Bcc1fc82e8b6e9bff2a8d32f17de76af?default=blank&size=40PerJon added this to the 3D Hardware collection ago
38c980ebc3318d4cd4d9b9598ec362ca?default=blank&size=40CookMedic added this to the Printer Parts collection ago
Acacbff64b0aff3dde7e149f4f1f3dfd?default=blank&size=40favabr added this to the reprap collection ago
Mini kuro63Kuro published this design ago