Chain keepers: dog fang & various styles
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chain keeper to prevent derailment of the chain towards the inside of the bike
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Aktualizacja u źródła:
Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution — Noncommercial
Worked on this throughout the years – the design has evolved a bit.
Rev 6
As of 2023-10-14, latest rev is rev 6.
Compatible with 31.8 mm seat tubes.
Hardware
M4 x 16 CSK screw
M4 nut, ordinary
if I have problems with the joint loosening over time, I will update this model to take a locknut instead, but I'm guessing the stretch in the band will be sufficient to provide anti-loosening properties – we'll see
PLA is sufficient for these stretchable band clamps.
Rev 6 installation
M4 x 16 CSK bolt + regular hex nut
Kind of awkward to mount, rev 7 will relocate the clamp elsewhere for ease of access
I was trying to save material, but this is too painful to use
I will wait until this one breaks or something before testing rev 7
Future improvements
Extend fang down so it doesn't bottom out on weld
Flip nut pocket upside down to maintain support-free printing
Move nut pocket to non drive side or at least 90 deg on middle plane of bike so it's accessible from the non-drive side
Rev 5
Rev 5 finally cracked after about a year
was an experiment to see how well M4 tapped threads straight into the PLA material would work