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*UpD8* Interest in bottomless EM6910 portafilters?

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  • #16
    Re: *UpD8* Interest in bottomless EM6910 portafilt

    this got me all excited Greg so I purchased one today from Pedro at Coffeeparts for my FAEMA. I have a spare for the EM6910 so I might take to it on the drill press and then dremel it smooth....Judging by my Pullman tamper your version just might be a bit neater than mine ()....

    Cheers

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    • #17
      Re: *UpD8* Interest in bottomless EM6910 portafilt

      Originally posted by Techo link=1208326453/0#14 date=1208425143
      Hi Greg, thanks for the update. The general opinion on the net seems to be "no difference". But it is mouth watering to watch, which has got to change the taste and as they say a great way to improve your tamp technique so yeah Im in.
      Cheers
      Curious, thats certainly not been the general opinion in the articles Ive read, discussions Ive had and shots Ive tasted, but each to their own. Anyway such a debate can be left to another thread, nice to have you on board!

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      • #18
        Re: *UpD8* Interest in bottomless EM6910 portafilt

        I have voted yes but might need to put this one forward for a Fathers Day or Birthday Present. This will certainly test my skills as a sunbeam user.

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        • #19
          Re: *UpD8* Interest in bottomless EM6910 portafilt

          perhaps a package deal Greg - Tamper and Bottomless P/F for $x (and if you could let me know what x might be)?

          Cheers

          Sen

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          • #20
            Re: *UpD8* Interest in bottomless EM6910 portafilt

            In which case,.. Ill have BPF+T-T=$X ;D as I already have the factor T as you know and its a fantastic T at that, let me just say... spins like a hovercraft on top of the grounds.

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            • #21
              Re: *UpD8* Interest in bottomless EM6910 portafilt

              Originally posted by Senator link=1208326453/15#18 date=1208650409
              perhaps a package deal Greg - Tamper and Bottomless P/F for $x (and if you could let me know what x might be)?

              Cheers

              Sen

              Now I like this option :-)

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              • #22
                Re: *UpD8* Interest in bottomless EM6910 portafilt

                I guess the modded 6910 PF would be showing brass, and is not being re chromed ?

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                • #23
                  Re: *UpD8* Interest in bottomless EM6910 portafilt

                  Yep the tamper+PF deal will be on offer for those who are keen, details will be announced when theyre ready for sale.

                  Unless you want to pay for them to be rechromed, the portafilters will be showing the brass as per attached - this is the one I modified for my own purposes and I cant say the thin band of brass this has ever bothered me, and it works just as well as a fully chromed one. Providing the SB units are much the same, this should be representative of what youre looking at, certainly of the smooth surface finish youll get. I.e. Im not intending to rip these out with a holesaw, Dremel, chisel etc, theyll be machined on the same lathe that does the tampers.

                  One other slight benefit of having no base is that the portafilter doesnt have to warm up as the espresso exits the basket straight into the cup, which would speed up whats already a fast warmup time on the EM6910.

                  Greg

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                  • #24
                    Re: *UpD8* Interest in bottomless EM6910 portafilt

                    very nice Greg

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                    • #25
                      Re: *UpD8* Interest in bottomless EM6910 portafilt

                      First cab off the rank... http://coffeesnobs.com.au/YaBB.pl?num=1209388781/0#0

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                      • #26
                        Re: *UpD8* Interest in bottomless EM6910 portafilt

                        Originally posted by Greg Pullman link=1208326453/15#24 date=1209389035
                        First cab off the rank... http://coffeesnobs.com.au/YaBB.pl?num=1209388781/0#0
                        Ok... I am up for a PF with no bottom... Where do I place my order.

                        Secondly, as it has been a year since the last Fathers day ( Family got naught from CS ) I feel that a matching Tamp is also in order

                        Hit me with ya best price... :

                        I will then do my best to do a package deal... :-*

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                        • #27
                          Re: *UpD8* Interest in bottomless EM6910 portafilt

                          Sure thing! If you want the one in the link (under the For Sale section) you can email me your details and its yours, can be in tonights post as its all ready to go. That thread mentions the tamper package deal as well. Otherwise if you want to wait for the main batch, shoot me an email to confirm what you want and the first one of the main batch is yours. Once the main order is in and completed Ill get a more formal ordering system in place.

                          Greg

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                          • #28
                            Re: *UpD8* Interest in bottomless EM6910 portafilt

                            Originally posted by Greg Pullman link=1208326453/15#26 date=1209608710
                            Sure thing! If you want the one in the link (under the For Sale section) you can email me your details and its yours, can be in tonights post as its all ready to go. That thread mentions the tamper package deal as well. Otherwise if you want to wait for the main batch, shoot me an email to confirm what you want and the first one of the main batch is yours. Once the main order is in and completed Ill get a more formal ordering system in place.

                            Greg
                            E-mail and $$$ sent :-)

                            Comment


                            • #29
                              Re: *UpD8* Interest in bottomless EM6910 portafilt

                              Originally posted by Greg Pullman link=1208326453/0#13 date=1208408298
                              Its worth having a look at this YouTube clip of a bottomless 6910 extraction, although the following would apply similarly to any machine. This is a slow motion clip which is helpful in watching the details. [...]

                              These are all situations which would present as simply premature blonding in a normal portafilter so troubleshooting the real cause would be difficult; yet the deficiencies become immediately obvious with a bottomless portafilter.

                              Greg
                              The other thing that occurs to me is that if you are forcing all the coffee out of a couple of holes at the bottom, its hard to see how back pressure cant force some unevenness in extraction. It would be an interesting project in fluid dynamics to design an extraction container that had more or less even fluid flow over all the ground coffee.

                              Comment


                              • #30
                                Re: *UpD8* Interest in bottomless EM6910 portafilt

                                Hi! Is the offer still on for the portafilter and tamper combo? hope its not too late :-?

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