BIGTREETECH 3in1 hotend holder

I was inspired by hotend holder https://www.thingiverse.com/thing:1703064

But 30x30 fan are weak and can't really cool down the hotend.

Moreover the bronze bearing was abused after 10-15 days and I've twice melted holder :(

Then I suggested to develop my own holder for the BIGTREETECH 3in1 bowden hotend.

I've already tested this design with E3D Hotend and this is the 3in1 version.

The holder has exhaust of hot air from hotend to the top, and doesn't cool down filament if this is don't wanted.

For this holder I've used one standard 40x40x10 fan for hotend cooling and two 40x40x10 blower fan such as https://www.amazon.com/GDSTIME-40x10mm-Brushless-Cooling-Printer/dp/B07MS1DBZ7 for filament cooling.

This design allow to print up to 75° overhang

There is two places for LED boards about 12x35mm lefts and rights from the nozzle lighting 45° to center of the nozzle.

For mounting the holder together you need 4 hex socked head bolts M3 55mm length (ISO 4762 or DIN 912) and two same type 30mm long.

You can also use bolt with other head same length.

I suggest PETG filament. It start to melt by height temperature.

On the screenshot you can see suggested support configuration for Ultimaker cura.

IMPORTANT to avoid hotend melting I suggest to use silicone sock for hotend!

Print Settings

Printer:

Self made (Prusa i3 variant)

Rafts:

No

Supports:

Yes

Resolution:

0.2

Infill:

85%

Filament:

any

Notes:

I slice using Ultimaker Cura. First layer is 0.4mm 190% width for better adhesion.