Portafilter doser ring for espresso

thingiverse

My coffee grinder doses according to a timer and occasionally overfills my espresso machine portafilter. I created this funnel shaped doser ring to fit a standard 59 mm portafilter. The ring sits on the upper edge of the portafilter, effectively extending the sides of the basket by about 15 mm, enough to keep grounds from spilling out when grinding and filling.