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On this product page you will find a bottomless portafilter suitable for the La San Marco brewing groups. La San Marco is the only commercial brand which uses the 3 ear configuration instead of the standard 2 ear configuration. This portafilter has been manufactured in Italy.
The thickness of the ears on the bottomless portafilter are 7mm instead of the standard ear size used by San Marco of 7,4mm. This filterbasket comes with a 2 cup filterbasket and spring.
You can use this portafilter on various La San Marco models such as the San Marco 85, San Marco 95, San Marco Lever brewing groups and a lot more models. For the complete list check the extra info tab.
Data sheet
In some cases bottomless portafilters are interchangeable between brands, such as the Nuova Simonelli bottomless portafilter, this one is interchangeable with the one used on most Victoria Arduino espresso machines. This has to that it is the same brand.
You can add any filterbasket to the bottomless portafilter. But in most cases a deep double filterbasket is installed. This has to do that there is no bottom in the way.
In almost most cases bottomless portafilters are made from brass which has been chrome plated. A few brands make bottomless portafilters from stainless steel. But that is a minority
Bottomless portafilters start as regular casted portafilters. But during the machining process the bottoms are cut out of the casting, which creates a bottomless portafilter. After this the portafilters are sanded and polished into a mirror finish and chrome plated.
No, the portafilters used on Breville, Sage and Solis espresso machines are unique to those brands. And are also a lot smaller then the standard 58mm portafilters, which are used for instance on E61 brewing groups.
