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portafilter spout (single + double)

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3D model description

This is a single spout for the Gastroback Advanced Pro G portafilter (also available as Breville BES 860 and several other names) designed to replace the double spout that ships with the machine.

I've optimized the flow for a smooth, bubble-free output without splashing and stuff. Works quite nice and should fit any portafilter with a M16 fine-pitch thread (DIN 13-5) outlet.

I recommend to print it in a food-safe and high-temp material such as ~~BDP (green-tec) from extrudr~~ ULTEM 9085, some nylons or HT-PETG. Doesn't need any support ~~but make sure you're using a proper part-cooler for the overhang sections~~ (works fine without fan now).

Here's a video of the spout in action:
https://media.giphy.com/media/cPzpmKf48cEco/giphy.gif

edit: I just changed the thing to make it easier to print (without fan for high-temp materials) and produce less bubbles. This latest one was printed in ULTEM 9085 because these made of Green-Tec (+Pro) didn't last all too long.

editedit: The one made of ULTEM was leaking due to some inaccuracys on the print, so I've made some further tests. Nylon (Polymaker CoPA) didn't last for 2 weeks and currently I'm running out of materials which is why I half-jokingly tried recycled PET (Filamentive OnePET) which surprisingly makes a good impression. Because there's no glycole in this pure PET, the thermomechanical properties differ a bit from PETG and it's possible to anneal the part (~140°C/2h and cooling down for ~6h) for even more stiffness + temp. resistance. The pictures of the blueish outlet show the difference between virgin (translucent) and annealed (opaque) part.

editeditedit: Due to request I made a double spout (rev. 31).

3D printing settings

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  • 3D file format: STL
  • Publication date: 2021/03/26 at 19:47

License

CC BY NC SA

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