sprool is a pragmatic take on a 3d printed spool

...which also fit's on the A1 mini!

sprool was designed after my frustration with trying to find a suitable 3d printed spool that:

• Is neither costly nor time consuming to print
• Does not contain many travel moves and retraction moves
• Is extremely forgiving to print
• Has sufficiently "breathable" walls that allow for quick and even filament drying

...so I made my own! Made to fit both eSUN and Bambu Lab refills with filament densities of <1.3g/cm^3 (IE: PLA, PETG and TPU)

Features:

• 2 piece screw-on design
• Mesh spool walls for quicker filament drying and durability
• Thick rims for strength and rigidity
• Built in filament clips on the sprool rim
• Easy print on any machine
• ~4hr total printing time (on the A1 mini with given profile) per set with ~125g in consumption

Requirements, Notes and Limitations:

1. 3D printer with a minimum build plate area of 180mm x 180mm x 50mm
2. For users who would like to use this spool in a filament dryer/heated environment of > 50°C, please use PETG/ABS.
3. sprool uses a tested modified object profile to optimize printing speeds and strength, if you slice the model with a default profile, you may suffer longer print times.
4. sprool is named sprool because changing file names in Autodesk Inventor is more harder then calculus
5. sprool is only compatible with refills from Bambu Lab or eSUN (or those with the same inner diameter, height and locking notch)

sprool Geometry:

• Inner Diameter 55mm
• Outer Diameter 180mm
• Height 66mm
• Thread: Modified ISO Metric (with thread angle adjusted to 80°)