Spool Holder adjustable with bearings for Prusa i3 MK3S

Spool Holder adjustable with bearings for Prusa i3 MK3S

Original spool holder (no printed double holder) delivered with original Prusa MK3S is not good for smooth unwinding filament.
So I designed and created my own.

• adjustable for Filament spool PM and Filament spool Prusament
• easy unload/load of Filament spool
• easy mounting/demounting and positioning of bracket arms
• very easy unwinding (minimal rolling resistance)
• adjustable unwinding resistence [upgraded version]

printed parts, material PETG:
[layer height=0,2mm][Infill=30% Grid][vertical shells perimeters=3]

Pos-001b_Center bolt revision "b"
Pos-002_Center nut

printed parts, material PETG:
[layer height=0,2mm][Infill=20% Grid][vertical shells perimeters=3]

Pos-003-01a_Holder arm L revision "a"
Pos-003-02_Holder L
Pos-004-01_Holder arm R
Pos-004-02_Holder R

printed parts, material PETG:
[layer height=0,15mm][Infill=50% Grid][vertical shells perimeters=3]

Pos-005_brake holder
Pos-008_closing screw
Pos-007_brake disc (alternative for steel ISO7093-1 washer modified)

printed parts, material PETG:
[layer height=0,15mm][Infill=30% Grid][vertical shells perimeters=3]

Pos-006_marking template [for steel washer as brake disc]

purchased material:
2x KINEX Ball bearing 606-2Z (606ZZ)
1x Rohr 8x1 AL length=102mm
1x DIN 976A Threaded rod M6 length=160mm
4x DIN 985 Hexagon nut with polyamide thread lock M6
4x ISO 4762 Hexagon socket head cap screw M3x16
4x ISO 4032 Hexagon nut M3
3x DIN 7991 Countersunk flat head screw M3x10 (M3x8)

"brake disk"
ISO 7093-1 Washer 16 (d17xD50xh3) modification see on drawing sheet 2
alternatively Pos-007_brake disc

"brake pad"
MIRELON PRO (polyethylene foam, insulation of water pipe)

Update - revision
Pos-001a_Center bolt (revision "a")

"Pos-001a_Center bolt " more universal. (upgrade for narrower filament spools)

UPGRADE
Adjustable "brake" for optimal unwinding resistance.

Pos-001b_Center bolt revision "b"
Pos-003-01a_Holder arm L revision "a"
Pos-005_brake holder (new part)
Pos-008_closing screw (new part)

"brake disk"
ISO 7093-1 Washer 16 (d17xD50xh3) modification see on drawing sheet 2
alternatively Pos-007_brake disc (new part)

"brake pad"
MIRELON PRO (polyethylene foam, insulation of water pipes)

3x DIN7991 Countersunk flat head screw M3x10
(alternatively M3x8 for plastic brake disc )

Print instructions

Slic3r Prusa Edition settings:
0,20mm QUALITY MK3 (for Pos 001 002 003 004)
0,15mm QUALITY MK3 (for Pos 005 006 007 008)
Prusament PETG
Original Prusa i3 MK3S

layer height = 0.2mm (for Pos 001 002 003 004)
layer height = 0.15mm (for Pos 005 006 007 008)
vertical shells perimeters = 3
Infill=30% Grid (for Pos 001 002 006)
Infill=20% Grid (for Pos 003-01 003-02 004-01 004-02)
Infill=50% Grid (for Pos 005 007 008)

printing time:
6h 59min [Pos 001+002]
7h 52min [Pos 003-01+02 + 004-01+02]
1h 17min [Pos 005+008]
0h 34min [Pos 006]
0h 33min [Pos 007]