I designed a Tamper for a Portafilter with a 51mm diameter. You can print the parts separately and screw them easily together. Recommendations: I definitely would recommend using food safe material for the bottom part. A good company that provides this filament is FormFutura: HDGlass
STL file Coffee Tamper 51mm (Portafilter) ☕・3D print design to download・ Cults
coffee tamper 51mm 3D Models to Print - yeggi
51mm portafilter 3D Models to Print - yeggi
Free STL file Coffee Tamper ☕・3D printing model to download・Cults
STL file Coffee Distributor & Tamper ring .porta Brew Better Coffee: The Simple Tool That Makes a Big Difference 51mm ☕・3D printable design to download・Cults
Free 3D file 51mm Coffee Portafilter Wall Mount / Shelf ☕・3D print design to download・Cults
espresso tamper 3D Models to Print - yeggi
Tamper best 3D printing files・119 models to download・Cults
60mm coffee tamper by 3D Models to Print - yeggi - page 11
Tamper best 3D printing files・119 models to download・Cults
Free STL file Holder Handle Filter / Coffee press / Coffee press ☕・3D print model to download・Cults
mechanical coffee tamper 3D Models to Print - yeggi - page 40