Ender 3 ball-bearing filament spool holder

thingiverse

# Summary Replacement for the stock filament spool holder of an Ender 3 (V2) with four built-in 608 ball-bearings for minimal resistance to the filament feeder. # BOM ## Fasteners - 6 * M3x20 - 3 * M3x16/20 - 9 * M3 nut ## Bearings - 4 * 608 2RS (8x22x7 mm) [Exmple](https://www.skf.com/group/products/rolling-bearings/ball-bearings/deep-groove-ball-bearings/productid-608) ## Filament PLA # Parts - Bearing block with endstop - Part 1+3 - Main Shaft - Part 2 - Mounting Shaft - Part 4 - Mounting Cover - Part 5 # Instructions Short video showing the assembly using M3 bolts: https://youtu.be/hIwE_BZRAI8 1. Print all 5 parts (the **bearing block** is used twice) 2. Push the *bearings* onto their posts on the two **bearing blocks** 3. Insert three *nuts* into the slots on one side of the **main shaft** 4. Affix the **first bearing block** to the **main shaft** using three *M3x20 bolts* 5. Insert three more *nuts* into the slots on the other side of the **main shaft** 6. Thread three more *M3x20 bolts* first through the **mounting shaft** and then through the **second bearing block** and affix both to the **main shaft** 7. Insert the last three *nuts* into the slots of the **mounting shaft** 8. Thread three *M3x16/20 bolts* into the **mounting cover** 9. Insert the **mounting block** into the Ender's stock filament holder bracket (the thin bezel should locate perfectly in the bracket hole) 10. Attach the **mounting cover** tightly to the **mounting block**