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converting a pressurised basket into a non-pressurised basket

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  • #16
    Re: converting a pressurised basket into a non-pressurised basket

    Thats what I thought it was at first too AM but nup...its definitely something like silicon...not the gooey sort...more like those little silicon mats under the sunbeam grinders...kind of as if they have sandwiched a slice of it in between the layers...this would be about 3mm thick or so I guess...and as I have been able to dig a sample out and examine it I am fairly sure it isnt crud...which of course is what I expected to find in there. Might have to get hubby to continue digging or grinding so we can extract the whole piece of stuff from inside...at present I can now see through the holes he drilled and see daylight coming from the other side which is a step in the right direction.

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    • #17
      Re: converting a pressurised basket into a non-pressurised basket

      Originally posted by 4F4A4D4F535A3F0 link=1249529102/15#15 date=1250406858
      Thats what I thought it was at first too AM but nup...its definitely something like silicon...not the gooey sort...more like those little silicon mats under the sunbeam grinders...kind of as if they have sandwiched a slice of it in between the layers...this would be about 3mm thick or so I guess...and as I have been able to dig a sample out and examine it I am fairly sure it isnt crud...which of course is what I expected to find in there. Might have to get hubby to continue digging or grinding so we can extract the whole piece of stuff from inside...at present I can now see through the holes he drilled and see daylight coming from the other side which is a step in the right direction.
      Interesting as the Presso units also use a Si mat with lots of holes...

      The issue is that if you have SS bottom and lots of holes and then Si mat and lots of holes..

      Not fully un pressurised... but much better than the single hole... However crap has to get caught, once you start grinding finer... Which you will need to do with the non pressurised basket...

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      • #18
        Re: converting a pressurised basket into a non-pressurised basket

        Thanks for reminding me to grind finer...I wouldnt have done that :-[..

        I suppose running water through the empty basket via the group head could help clean it a little? although there wont be so much pressure now will there?...mmm...

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        • #19
          Re: converting a pressurised basket into a non-pressurised basket

          Have you looked at just replacing the basket with the Krups one? I am currently checking this out as I have an EM5900. I am going into the show tomorrow to check it out..

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          • #20
            Re: converting a pressurised basket into a non-pressurised basket

            Hi purple,

            Take a look at the following thread if you havent done already
            http://coffeesnobs.com.au/YaBB.pl?num=1234064740

            Cheers, TB

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            • #21
              Re: converting a pressurised basket into a non-pressurised basket

              Just waiting on AussiPost now for my new tweeked pressurized... now non-pressursed baskets thanks to Mrseca!!! Cant wiat to try them on my old sunbeam machine which now lives in my office @ work! Bring on Monday and test driving it! ;D ;D

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              • #22
                Re: converting a pressurised basket into a non-pressurised basket

                Hey sunnboy from memory the only problem with the Krups baskets is they dont fit as well as the origionals. A new thinker spring fixes it though (from a 58mm portafilter).

                But I havent looked at one in person- how did u go the other day checking them out??

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                • #23
                  Re: converting a pressurised basket into a non-pressurised basket

                  Some thoughts on converting the pressurised basket.

                  I did this some time ago and after carefully grinding the bottom off I discovered that the internal filter screen is just a press fit into the outer basket , which has slightly tapered walls.

                  This means that with some carefully directed tapping to the inverted basket with a hammer the inner filter screen just drops out.

                  The outer basket can then be drilled out with as many holes as you like or drilled cut and filed (it is quite thin stainless steel, and files easily).

                  Once you are happy with the size of the hole and the finish, the inner filter screen is just pushed back in....I seated mine securely by putting a short length of 20mm dowell in a vise and dropping the inverted basket over it then tapping around the edges to seat the filter in to the outer basket.

                  No need for a lathe or even a Dremel simple hand tools - a drill and round file suffice.

                  Works very well ...give it a try !

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                  • #24
                    Re: converting a pressurised basket into a non-pressurised basket

                    Hmmm, lathe (if you have one) is a 3 minute job with a perfect result.
                    Find someone with a lathe.

                    Mrseca.

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                    • #25
                      Re: converting a pressurised basket into a non-pressurised basket

                      After some playing with my new formally pressurized now non pressurized done expertly on a lathe. Makes a huge difference to what is now in my cup. Thanks heaps mrseca!!

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