One of my very old DIY elktro-acoustic guiters had broken tuners on it. I did not want to order me new ones, since the mechanics were Ok, it was just the plastic covers that were all more or less torn up.
In Openscad, I designed the to be 3d-printed sleeves that fit around the metal tuner shafts.
acoustic_old_guitar_tuner_plastic _replacement_part_5.9mmID_10mmOD_30mmL_V3_20260305
I printed 6 sleeves in transparant PETG on the Voron 600 (0.8 mm nozzle, 0.3mmLH, 235deg nozzle//85deg bed.
No supports, although I did use a firm brim around the shaft. I printed the sleeves one at a time, in 7 minutes each.
The old shafts were tapped out of the metallic shafts. I used my vice and opened the vice’s jaws just enough to tap the shafts out of the sleeves.
Mounting the sleeves around the shafts is pretty easy, since the hole in the shafts and sleeves can be lined up due to the transparancy of the PETG material.
The shafts fit easily in the sleeves, although I used the vice to push the shaft in for the last 1-2 cm, due to the tight fit of the shaft in the inner sleeve’s recess that makes the sleeve follow the circular motion of the shafts when tuning the strings.
When installing the tuner sets, I used some vaseline around the plastic sleeves where they meet the holes in the tailstock wood so the sleeves don’t get stuck.
The process of de mounting and mounting the sleeves and the tuner sets is pretty self-expalinatory, please have a look at the below added photo’s!
BTW, I made 2 versions of the sleeves.
The one I used on my fast Voron600 is a bit wider inside (shaft diameter +0.4mm) .
This is needed due to the fact that little holes are always printed smaller on my Voron600 with the 0.8mm nozzle than designed.
If you want to print the sleeves with an accurate 3d printer, the exact fitting design is HERE: acoustic_old_guitar_tuner_plastic _replacement_part_5.6mmID_10mmOD_30mmL_V3_20260305
