BTTF Pinball Flipper Ball Guides
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Replacement ball guides that feed the flippers in Back to the Future Pinball
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Updated at source:
Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Attribution
Over time, the original steel ball guides near the base of the flippers get flattened and misshapen from repeated ball hits. This ends up causing ball hop as it transitions to the flipper.
I've scanned and re-made the ball guides.
I made two versions - an exact copy of the original part (in STL, STEP, and DXF). This shouldn't be printed and is included in case you'd like to reproduce this part in metal.
I also included the scan I traced it from. The ball guides and ruler have been rotated slightly in the image to make them perfectly horizontal.
The second version is thickened, and the mounting holes are slightly enlarged to allow better positioning. You'll need to print with minimal supports on the underside of the counterbores.
Material choice is very important here! These parts will take repeated strikes from a pinball and they must be highly impact resistant! I used 5 perimeters and fairly dense infill.
Best materials:
- Polycarbonate (what I printed these in)
- ABS (not as good as PC but still quite good)
- ASA (not as impact-resistant as ABS)
- Nylon, maybe?
- Very stiff TPU, maybe?
- PETG as a last resort.
Do not print in PLA! It will shatter eventually.