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Prusa Core One Bearing Spool Holder
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New spool holder using bearings for easier rolling
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- Printables
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- Prusa Parts & Upgrades
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- Creative Commons — Attribution
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I wanted a spool holder with bearing to stop the cardboard spools wearing down while printing. I looked around online to see how other people had solved this then made this from scratch.
BOM:
- 1x M8x80mm bolt (~74mm of thread, 80mm total length, Flat-flat distance of the head should be ~12mm, it should be snug, but not tight to insert)
- 2x 608 bearings
- 2x M8 nuts (~6.5mm tall)
- 4x M3 4.2x4mm heat inserts
- 4x M3x8mm machine screws (i found i had these leftover from the C1 kit build)
Assembly:
- Install the heat inserts into the base
- push the M8 bolt in from the bottom
- drop 1 608 bearing on the bolt
- install one M8 nut to clamp the bearing and the bolt to the base
- Install one 608 bearing into the outside end of the spool holder (This end has the large course thread). This will likely be a tight fit, I have no clearance in my model for this, it was a tight-ish press fit for me.
- OPTIONAL. install the bushing over the M8 Bolt
- install the holder over the bolt and push down to seat the inside bearing into the holder.
- Tighten down a nut on the bolt to pull the assembly together, then loosen to free it up.
- OPTIONAL. Undo the nut on the end an put a small dab of locktite
- Install the Cap on the end of the holder
- Install into the printer.