Shimano Pressfit Bottom Bracket Gentle Removal Tool SM-BB71-41B (No hammer)
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Tool for removing Shimano bottom brackets, made with printed parts and hardware components. It doesn’t require hammer.
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- Creative Commons — Attribution — Noncommercial
I designed this tool based on the measurements of a Shimano Pressfit SM-BB71-41B. It might also work for other models, but I recommend checking the dimensions and making adjustments if needed.
You will need few hardware parts:
- 1x This type of rawlplug (very common here in Italy; they are used to fix shelves). The one I used was M8 threaded and 165 mm in total length. (You will discard the plastic part);
- 1x M8 Nut;
- 1x M8 Washer;
Rawplughousing.stl - As you can see in the pictures you need to push the rawplug into the housing (make sure it goes all the way deep).
Cup.stl - You'll need to add a PAUSE when printing the Cup.stl to allow for embedding the washer in its seat. Insert the nut into its seat once the cup is printed.
Pusher.stl - The flat part is the one that makes contact inside the press-fit and applies pressure when screwing.