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Tern GSD Pulley
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Three part Tern GSD replacement pulley
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution — Noncommercial — Share Alike
Front side is notched to allow for the chain to pass in/out while the pulley is screwed in, so you can put the chain on/off the pulley while the pulley is installed.
Sides printed at 100% in ASA. Center core printed in TPU.
I've done about 100 miles on mine and it continues to look good.
Improvements:
- Notched front face so chain can be inserted/removed while pulley is installed
- Covering more of the bearing face and allow for waterproof grease at the face
- Reprint at home
Instructions:
- Use original Tern bearings, clean them so they spin nicely. You want to use the originals because they seem to be a tighter tolerance to allow it to bind with the post for spinning. I haven't found 608 bearings that don't end up spinning on the shaft rather than spinning on the bearing. Tern has a smaller ID somehow on the bearings they supply so it binds but also allows it to slide.
- Put waterproof grease in each side of the bearing pocket. I use Phil Wood.
- Press fit the bearings into each side using a flat faced wrench/plier or mallet.
- (Optional) Apply CA glue on the OD of the center sleeve.
- Press fit the entire assembly together, you should see the two inner faces meet when fully pressed
- Attach to bike without chain passing
- Pass chain into notch
- Ride