Filament Passthrough Drybox (Pulley Type Low Friction)

Allows filament to exit the drybox and immediately make a tight corner, without chafing the filament or adding much friction.

Hence allows the filament box to stand close alongside the printer.

To be honest, in many situations it has no real advantage over the much simpler PTFE tube type passthru.

But I find that in the above-described case, and especially where the filament has a rougher texture to it, this device keeps things moving smoothly. It's what I use now.

I'd reckon it's somewhat a work-in-progress, just as it can be a little tricky to assemble.

Especially the idler bearing nearest to the base didn't want to go in, until I whittled away the small locator spigot.

Also the turret doesn't swivel all that easily, but this isn't such a problem where the swivel is only accommodating the slow Z travel.

But once it's set up, mine has been working really well.

It requires a 38 mm (1.5") hole in the filament box. This is a common size for hole saws or "tank cutters".

Hardware needed:

• 608 Bearings 3 off
• Bolt M5 x 20 1 off
• Bolt M4 x 16 2 off
• Nut M5 1 off
• Nut M4 2 off
• Countersunk woodscrew Ø3.5 x 19 mm 4 off

= = =

Print Settings

Printer Brand:

Creality

Printer: 

CR-20

Rafts:

No

Supports: 

No

Resolution:

Layer 0.12 mm

Infill: 

30

Filament: PLA 
 

Notes:

For the Turret part especially, use a a close-fitting brim, as this item is tall and has little base contact area.

FreeCAD source model included

Category: 3D Printer Accessories