hi level3Ninja,
I am hoping to get some advice on naked portafilter conversion, but my question is more about modifying an existing naked portafilter and I hope this is the right place to ask.
I have ROK(Presso) naked portafilter (purchased from the ROK distributor in Australia) that I was never happy with... It makes a big mess whenever my tamp is a bit off resulting coffee running down the handle and dripping everywhere. I suspect the issue is that the cutout is too small and any sort of squirting from the basket caught on the rim. It was seeing your nicely converted jobs that made me realise this issue, but I never bothered fixing the problem as I had kinda gave on ROK as I could never get it to consistently make decent "espresso" shot.
Recently I acquired a post-mil La Pavoni Professional lever machine and I was very surprised to find that the portafilters are almost the same size, as the filter baskets are interchangable and the Presso portafilter "almost" fit into the La Pavoni., this is despite the La pavoni basket is officially 51mm and the ROK is 49mm.
The "ears" (not sure if thats the right terminology) on the ROK portafilter seems slightly larger than the La Pavoni
So my questions are
1. Can I widen the cutout on the already converted ROK naked portafilter?
2. How do I modify the ROK portafilter to fit the La Pavoni? ie. shave a mil off the "ears"?
I have some basic powered tools and willing to give it a go if not too dangerous!
Below are the photos of the
ROK PF

ROK vs LP professional
I am hoping to get some advice on naked portafilter conversion, but my question is more about modifying an existing naked portafilter and I hope this is the right place to ask.
I have ROK(Presso) naked portafilter (purchased from the ROK distributor in Australia) that I was never happy with... It makes a big mess whenever my tamp is a bit off resulting coffee running down the handle and dripping everywhere. I suspect the issue is that the cutout is too small and any sort of squirting from the basket caught on the rim. It was seeing your nicely converted jobs that made me realise this issue, but I never bothered fixing the problem as I had kinda gave on ROK as I could never get it to consistently make decent "espresso" shot.
Recently I acquired a post-mil La Pavoni Professional lever machine and I was very surprised to find that the portafilters are almost the same size, as the filter baskets are interchangable and the Presso portafilter "almost" fit into the La Pavoni., this is despite the La pavoni basket is officially 51mm and the ROK is 49mm.
The "ears" (not sure if thats the right terminology) on the ROK portafilter seems slightly larger than the La Pavoni
So my questions are
1. Can I widen the cutout on the already converted ROK naked portafilter?
2. How do I modify the ROK portafilter to fit the La Pavoni? ie. shave a mil off the "ears"?
I have some basic powered tools and willing to give it a go if not too dangerous!
Below are the photos of the
ROK PF
ROK vs LP professional




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