JoeFrex - 58 mm Tamper Base KNOCK-CONVEX
All KNOCK CONVEX bottom parts have a slightly convex pressing surface to press the coffee grounds.
Why the name Knock?
After pressing the coffee grounds for the first time, lightly tap (from English Knock) on the side of the filter holder to dislodge any remaining grounds. This allows for subsequent pressing. To avoid using the base of the tamper or the wooden handle for this light tap on the filter holder, risking damage to both the tamper and the filter holder arm, you can now tap with the silicone ring integrated into the base.
Why the name CONVEX?
Normally, the surface of the coffee grounds pressed into the filter holder doesn't play a significant role; whether it's flat or concave, there's enough space between the coffee surface and the dispensing group so that the water can be evenly distributed over the coffee grounds and pass through them evenly. However, if a flat filter is used in the arm, or if much more than 7g (for a one-cup filter) or 14g (for a two-cup filter) is used, the space between the coffee grounds and the dispensing group may be too small for optimal water distribution. For this purpose, you can use the Convex Tamper Base, as it leaves a cavity in the middle of the pressed coffee for better water distribution.
The dimensions of the tamper to be used vary depending on the manufacturer. Here is a list of manufacturers and their required dimensions for tampers.
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 Manual Lever for Domestic Use (from 1999 onwards) Tamper 51mm
La Pavoni Manual Lever for Domestic Use (up to 1999) Tamper 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
