Spool Holder

This was designed for an Ender 3 Printer, it mounts directly to the 2020 extrusion, so it should fit any printer with that. Thanks for checking it out!

Non Printed Parts List

• 2x 2 inch or 50mm nails
• 1x 4inch or 100mm aluminum (½"ODx.055"wall) this is the same rod used in the Hadley telescope.
• 2x 6200-2RS ball bearings
• 2x m5 t-nuts
• 2x m5x8 bolt
• Sleeve Retainer, or super glue may work.

Printed Parts List

• 1x Main Roller 
• 2x End Rollers
• 2x Bearing Holders
• 2x Frame Mounts

I used the existing m5 bolt and t-nut from my stock spool holder. 

I printed everything with .28-layer height. All with Standard PLA. Models will be in their correct orientation to print. No supports needed.

My recommended infill settings are as follows.

• Main Roller-10%
• Endrollers-90 to 100%
• Bearing Holders 75%
• Frame Mounts 65%-75%

Directions

1. Insert Aluminum Rod into Main Roller, make sure there is an even amount of rod sticking out on both sides.
2. Insert the bearings into the bearing holders (this should be a very tight fit, no glue or retainer needed, unless you would like too. Then install the holders onto the remaining aluminum rod on the main roller, one on each side.
3. This is where the nails come in to play, the nail needs to be heated and inserted into the bottom of the endrollers with the point of the nail pointed to the rounded side, I did this for pure support, mostly because plastic is plastic after all.
4. Apply sleeve retainer or superglue to round end of endrollers, and insert into the bearing.
5. Now you understand the rolling pin, don't you?
6. Use bolts and t-nuts to install frame mount.