MMU3 Spool Holder - Smooth Wheels
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Estimated printing price per file
€0.23 – €0.28 net (excluding VAT)
For file: mmu3_spool_holder_upgrade_spool_guide_(x4)_0.4n_0.15mm_PLA_MK4IS_16m.bgcode
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Average indicative estimate: €0.25 excluding VAT (range midpoint).
- Weight reported by the author
- 3 g
- Print time reported by the author
- 15.6 min
- Source material
- PLA
- Estimate material
- PLA
- Estimate printer
- Bambu Lab P1S - 0.4 nozzle
- Estimate process
- 0.20mm Standard
Indicative estimate for the selected file only, based on the author’s weight and print time. File variants are not added together. The final price is calculated after file analysis.
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Smoother spool holder wheels using skateboard bearings.
- Rating
- 4.8 / 5
- Likes
- 35
- Downloads
- 118
- Makes
- 5
- Views
- 716
- Reviews
- 5
Updated at source:
Model information
- Source
- Printables
- Category
- Prusa Parts & Upgrades
- License
- Creative Commons — Public Domain
Since the MMU3 can have issues if there is too much tension in the filament, an easy upgrade to reduce friction is to upgrade the plastic wheels in the spool holders. Skateboard bearings are great for this.
To use this, you will need to purchase 4 bearings per spool holder (20 total if you replace all 5 spool holders). I used Bones REDS Skateboard Bearings.
Just slide the outer spool guide over the bearing, and snap 2 of the pegs into the bearing. It can be a little annoying to close the spool holder, but everything fits snuggly inside. I found that putting one peg in a bearing and the other peg in the other side of the spool holder worked a little easier (see images).
I printed these in PLA and they work great. gcode provided for a full set of parts to upgrade a spool holder (4 guides and 8 pegs).
STLs provided for slicing yourself.
Settings I used:
- Guides: 0.15 structural, add brim, (infill doesn't matter, it's too thin), seam position = random, stagger inner seams = True.
Pegs: 0.15 structural, no brim, 15% gyroid infill