EZ Single Shot Funnel for 58mm 7g VST Baskets

If you love espresso and a person that can't handle the caffeine content of a double shot then you probably know the pain of packing grounds into a 7g single shot basket. This tamp-through funnel directs grounds into the region of the funnel where you actually want them and makes doing WDT a lot less frustrating.

It's not perfect and some grounds may end up beyond the edges of the funnel after WDT, but it really cuts down on how much time you spend pushing grounds into the lower part of the basket with your finger.

The cutouts are designed to fit the lugs of a Gaggia Classic portafilter, but will probably fit most 58mm portafilters.

Food Safety

Printing a part from food safe plastic does not make it food safe! The surface of FDM 3D prints traps bacteria and is usually not water-tight, even if it looks like it is.

Because the funnel is in regular contact with coffee, it should be coated with an epoxy specifically approved for food contact. The funnel in the pictures is coated with MAX CLR which is formulated for direct food contact in accordance with FDA regulations. Always follow all manufacturer curing and use guidelines to ensure the finish is food safe. Be sure to wash the part with warm soapy water after the epoxy cures before using.

Some wet sanding of the surface that contacts the basket after the epoxy cured was necessary for me to get the profile smooth enough for the funnel to function well.

Printing Recommendations

I was able to print this in PETG on a Prusa powder coated satin PEI sheet with the top of the funnel facing down without a brim or supports. A brim may be necessary if you have adhesion issues.

I recommend using variable layer height and reducing layer height  around the basket lip so it matches the designed profile as closely as possible, though I have had success printing at 0.2mm layer height as well. Epoxy will help smooth things out either way.