Breville 54mm Portafilter Dosing Funnel by DogsBollocks

Last crawled date: 3 years, 5 months ago

Most users of the Breville Brista Express espresso machine get frustrated when using the built in grinder, as the ground coffee tends to spill over the portafilter.
This dosing funnel attaches to the 54mm portafilter to provide additional room for ground coffee, but still retains the ability to use and trigger the built in grinder.
There are 2 versions:
For the single piece version, you will likely need to use supports when printing.
The 5-piece version has a top, bottom & 3 hook parts which are assembled using adhesive after printing.
Slicer Settings
15-20% Rectilinear infill
Turn off Only infill where needed (if using Slic3r/PrusaSlicer)
0.20mm layer height (or lower)
Finishing
You may need to sand the inside of the funnel to prevent the coffee grinds from sticking.
With the 5-piece version, the top and bottom halves have 3 holes each for alignment. The holes can be drilled out to 1.5-2.0mm and 7.5mm long pins used to align the 2 halves during assembly. Pieces of filament, wire or carbon rod are ideal for this.
The 5-piece version has to be assembled using your choice of adhesive. I used regular super glue (Cyanocrylate) for the prototype. If you use ABS filament, acetone or nail polish remover works well.
Designed in Fusion 360 and design file is included.