JoeFrex - 57 mm Tamper CONVEX
All "CONVEX" bases have a slightly convex surface for tamping espresso.
Why convex?
Normally, the surface of the coffee powder pressed into the filter basket does not play a significant role; whether it is flat or concave, there is enough space between the coffee surface and the group head so that the water dispensed from it can be evenly distributed over the coffee powder and pass through it uniformly. However, if a flat filter is used in the portafilter, or if much more than 7g (for a single shot filter) or 14g (for a double shot filter) is used, the space between the coffee powder and the group head may be too small for optimal water distribution. To address this, the Convex Tamper Base can be used, as it leaves a cavity in the middle of the pressed coffee, allowing for better water distribution.
The size of the tamper to be used varies depending on the manufacturer:
- Delonghi BAR Tamper: 51mm
- Dalla Corte Tamper: 54mm
- ECM Tamper: 58mm
- Elektra Micro Casa S1 Tamper: 49mm
- Elektra Tamper: 58mm
- Faema Tamper: 58mm
- Fiorenzato Tamper: 58mm
- Francis! Francis! X1 Tamper: 56mm
- Gaggia Tamper: 58mm
- Grimac Tamper: 58mm
- Isomac Tamper: 58mm
- IZZO Lever Tamper: 53mm
- IZZO Tamper: 58mm
- Krups Tamper: 48/49mm
- La Cimbali Tamper: 58mm
- La Marzocco Tamper: 58mm
- La Pavoni Club Combo / Duetto Tamper: 58mm
- La Pavoni Europiccola Tamper: 48/49mm
- La Pavoni Lever Tamper (from 1999 onwards): 51mm
- La Pavoni Lever Tamper (until 1999): 48/49mm
- La Pavoni Lusso Tamper: 53mm
- La Pavoni Millennium Tamper: 51mm
- La Pavoni Professional Tamper: 51mm
- La Pavoni Pub Tamper: 58mm
- La Scala Tamper: 58mm
- La Spaziale Tamper: 53mm
- Nuova Simonelli Tamper: 58mm
- Quickmill Tamper: 58mm
- Rancilio Tamper: 58mm
- Reneka Tamper: 57mm
- Saeco Tamper: 53mm or 51mm
- San Marco Tamper: 54.4mm or 53mm
- Vibiemme Tamper: 58mm
- Wega Tamper: 58mm
