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Thread: cinbali md6 new burrs, cant get grind fine

  1. #1
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    cinbali md6 new burrs, cant get grind fine

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi I bought this old grinder off a meber here a couple of years ago, and recently decided to change the burrs.

    The Cimbali burrs are a bit more difficult to source than the others, so I got Mazzer 64mm burrs instead. These are the same size and hole pattern and rotation as the Cimbalis.

    My problem is that even with the burrs apparently touching/near touching, the grind is still like medium salt crystal size, and conseqently no flavour extraction.

    Any ideas on what could be going on??

    Cheers

    Greg

  2. #2
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    Re: cinbali md6 new burrs, cant get grind fine

    A) Burrs / Grinding Plates for the La Cimbali grinder shouldnt be hard to get at all if you direct your enquiries to the importer of the brand in the country of your location. In Australia their HQ is in Melbourne but they have offices in a number of the capital cities.

    b) If all is as you say and done correctly then the simple answer is most likely that the grinding plates are no where near touching, and usually what stops the adjuster with top plate from winding down any closer to its expected position is a build up of grinds turned into a rubbery paste in the female thread (the one in the body of the grinder). Remove the adjuster assembly, use a dry tooth brush or similar to clear the thread down to the bottom plate, clear the male thread as well, suck out with a vacuum cleaner and reassemble carefully so as not to cross thread and all should be well. ;)

    c) Remember, commercial planar grinding plates should be good for atleast 400 kg (and longer depending on the type) so do a budget calculation on the use of any grinder before doing this type of job....it may not be necessary especially for a commercial type grinder used in a domestic (low volume) situation.

    Hope that helps,
    Attilio
    very first CS site sponsor

  3. #3
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    Re: cinbali md6 new burrs, cant get grind fine

    Thanks Attilio,

    There may have been some over eagerness to get was immedietly available in getting the mazzer burrs ...

    from the burrs that I pulled out, they were definately duller to the touch than the new burrs.* The old ones are Cimbali burrs, with two numbers moulded on the rear side - 11-93 and 427-23.* I guessed that the first may refer to the month and year of manufacture, and it is an old grinder so this wouldnt surprise me.* That is to say, I am sure they have done more than 400kgs.

    The threads were clean too.* With this grinder, you screw in the top burr carrier, which I did until it touched the bottom burr, wound it back a quarter turn, and put on the top grinder adjustment scale which screws into the top burr carrier.

    It now grinds super fast compared to before ... but as I said, nowhere near fine enough for espresso.

    Your thoughts??

    Cheers

    Greg


  4. #4
    Mal Dimal's Avatar
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    Re: cinbali md6 new burrs, cant get grind fine

    Quote Originally Posted by 1C29343C3C373E285B0 link=1302390765/2#2 date=1302393742
    With this grinder, you screw in the top burr carrier, which I did until it touched the bottom burr
    Gday Greg... :)

    How do you know the burr-plates are touching mate? Do you adjust down with the grinder running until you just hear the metal on metal sound or are you winding down with the grinder switched Off, until you can wind down no further? Have you actually compared the old burr-plates with the new ones for height? Are they exactly the same?

    Hard to believe that if the plates are near touching that the grind could be anything but fine. Then again, I wonder if the Mazzer Burr-Set you bought has been designed to run at the same speed as your Cimbali.... Manufacturers do alter burr-plate design to suit different operational speeds.

    Anyway Greg, might be some food for thought there.... ;)

    Mal.

  5. #5
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    Re: cinbali md6 new burrs, cant get grind fine

    Thank you Attilio and Mal,
    Yes you were right, I was wrong - I thought that the burrs were touching because I couldnt wind the carrier in any further - so I presumed (wrongly) that the two burrs were against each other.

    As you suggested, the threads in the body were dirty/gummed up and so I was unable to wind it further (even with muscle - so wrongly presumed definately touching ...).

    A clean of the body threads and the burrs now do indeed touch.* These new burrs much be a tad thinner than the old burrs, and so required to be screwed in that bit further, but couldnt because of the coffee gum - not much but enough to stop it in its tracks.

    All good now. Thanks for your tips.

    Greg

  6. #6
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    Re: cinbali md6 new burrs, cant get grind fine

    glad to help,

    A.

  7. #7
    Mal Dimal's Avatar
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    Re: cinbali md6 new burrs, cant get grind fine

    Quote Originally Posted by 152136203B0C103C35353636530 link=1302390765/5#5 date=1302435652
    glad to help,

    A.
    Ditto... :)

    Mal.



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