MMU Buffer

This is my version of the buffer required for the MMU (or MMU2s)

I based my design on other similar buffers but wanted to add some modifications so I redesigned this one completely from scratch.

The wheel turns very smoothly on a 6200 bearing.

I wanted a relatively big wheel so the turn radius is not too tight to avoid friction. The total assembly is 12.5cm tall and 14cm wide.

2 M10 fittings guide a 4mm PTFE tube all the way to the wheel.

Friction is very low.

Also a nice feature is the wheel turning while printing.

Parts needed :

• 4 printed parts
• 2 x M10 PTFE fittings
• PTFE tube
• 1 x M3x30 bolt
• 1 x M3 nut
• 2 x zipties
• 1 x 6200 bearing (10x30x9)

Print instructions

Printed with PETG Prusament Galaxy Black

Layer height : 0.2mm
3 perimeters
5 top & bottom layers
20% gyroid infill
No supports required

Print time : approximately 16 hours
Plastic required : +- 150g