Alternate wedge for Space Pi spool holder
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Modified wedge for @Jeff_1747957's Space Pi spool holder, using a M5 bolt and nut instead of the printed threaded axle.
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Due to issues with my filament and printer setup, I was unable to print the threaded spindle with sufficient accuracy or strength. The skateboard bearing was a very tight press-fit into the pulley, so I was able to get away with this approach to the wedge.
Print two of these. I suggest orienting it to have the large circular face down, and use supports for inside the hexagonal hole.
Requirements:
- The skateboard bearing is a tight fit into the “pulley” part you have printed. This remix relies on a tight press/friction fit to keep everything together. Or a plastic-to-metal glue, perhaps?
Extra parts needed, to give strength to the post. You'll need a set of these for each wedge:
- M5 Bolt, 14mm (ideal) to 16mm long.
- M5 Washer, unless your bolt has a unusually wide head.
Assembly:
- Check your M5 bolt passes through the part. If not, gently drill out with a 5mm or 5.5mm drill.
- Push a M5 nut into the hexagonal recess.
- Put the skateboard bearing over the post.
- Put the washer on the bolt, then secure it all together. You can do it up fairly firmly, and the bearing should still spin freely.
Checks:
- The bearing spins freely.
- The bolt doesn't protrude too far on the nut side, otherwise it'll scrape the Space Pi's lid.