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Thread: Rossi MC burr size

  1. #1
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    Rossi MC burr size

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi all,

    I notice the Rossi MC has 43.5mm conical burrs, while the Kony E and others of its ilk have 63 to 68mm conical burrs.

    I would imagine this makes a difference but my questions are;

    Is the difference that great that the Rossi MC is not worth it?

    Would a 63 - 68mm flat burr set be as good as a 43.5mm conical?

    Any help appreciated.

    Thanks

    Chris

  2. #2
    Sleep is overrated Thundergod's Avatar
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    Re: Rossi MC burr size

    Quote Originally Posted by 676F777D60040 link=1265410909/0#0 date=1265410909
    Would a 63 - 68mm flat burr set be as good as a 43.5mm conic
    As good as in what way?

    My Rossi grinds quicker than my Macap.
    Thats a good thing isnt it?

  3. #3
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    Re: Rossi MC burr size

    Quote Originally Posted by 0C302D363C3D2A3F373C580 link=1265410909/1#1 date=1265411377
    Quote Originally Posted by 676F777D60040 link=1265410909/0#0 date=1265410909
    Would a 63 - 68mm flat burr set be as good as a 43.5mm conic
    As good as in what way?

    My Rossi grinds quicker than my Macap.
    Thats a good thing isnt it?

    Well TG thinking good as in flavours...

    Along the lines of Mals recent experiences.

  4. #4
    Sleep is overrated Thundergod's Avatar
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    Re: Rossi MC burr size

    In theory it should be but I havent cleaned mine up enough to do a side by side taste comparison yet.

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    Re: Rossi MC burr size

    Quote Originally Posted by 222A323825410 link=1265410909/0#0 date=1265410909
    Is the difference that great that the Rossi MC is not worth it?
    I dont have 1st hand knoweldge so cant help with that question.

    Quote Originally Posted by 222A323825410 link=1265410909/0#0 date=1265410909
    Would a 63 - 68mm flat burr set be as good as a 43.5mm conical?
    Id say yes to that, provided its a good grinder and good burrs in the first place.

    I think the smaller the diameter, the more grinding needs to be done and the hotter the burrs will become. *I havent done an scientific research, but consensus seems to be that flat burrs will produce less fines, and for that reason are preferred for pour over/plunger grind settings.

    Hope thats of some use. *Sorry I didnt reply earlier - the 70 odd hours Ive put in so far this week must have blurred my vision and in between serving the 100 odd customers that came in today I missed your post. *:P ;D

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    Re: Rossi MC burr size

    Thanks mate

    I didnt see you on line today anyways...

    Appreciate your input.

    Ill PM you for further chat re grind plate structure and actually a fair bit of other stuff.

    Thanks again

    Chris

    p.s. Go home and open a red :)

    if possible...

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    Re: Rossi MC burr size

    Quote Originally Posted by 2D253D372A4E0 link=1265410909/5#5 date=1265444894
    Ill PM you for further chat
    Always welcome Chris! :)


  8. #8
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    Re: Rossi MC burr size

    Quote Originally Posted by 2028303A27430 link=1265410909/2#2 date=1265411454
    Well TG thinking good as in flavours...

    Along the lines of Mals recent experiences.
    As per Dens observations and everything else being equal, I dont see why not Chris.... :)

    Im not sure about the "fines" content though. With the (very) rough comparison I made with a few side by side single shot grind quantities before packing the M4 away, there seemed to be a higher proportion of fines with the planar burr grinder rather than the conical. The difference wasnt great, only about 10% by volume but it was quite observable using a fine gauze sieve.

    This may be due to the newness of the Kony compared with the properly bedded-in burrs of the M4 (at the most, only 15Kg through them). I dont know really and I wasnt aware of the propensity for conicals to create a higher proportion of fines, with blunt old burrs sure but with burrs in good condition, beats me.... :-?

    Mal.


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    Re: Rossi MC burr size

    Thanks Mal,

    Appreciate the help and understand you did little comparison ;). Id be straight on the Kony-E as well ;D.

    I guess I was hoping that someone out there had had experience with both size conical burr sets and could therefore help as to whether the difference in size is proportional to the difference in cup.

    Did a search and found stuff but, I guess an age gap between machines means no direct comparison without someones experience. Anyways, Ill keep pondering...

    Thanks again mate,

    Chris

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    Re: Rossi MC burr size

    Actually, a few years ago I came close to buying a slightly used Gino Rossi Conical, same as TG currently owns. I just couldnt get the necessary funds together in time so someone else managed to grab an excellent grinder.

    I think Chris of Talk Coffee has used a number of different Rossi grinders over the years so if anyone can give you an opinion, Chris should be able to....

    Anyway mate, all the best..... :)

    Mal.

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    Re: Rossi MC burr size

    Quote Originally Posted by 1D30343835590 link=1265410909/9#9 date=1265459605
    Actually, a few years ago I came close to buying a slightly used Gino Rossi Conical, same as TG currently owns. I just couldnt get the necessary funds together in time so someone else managed to grab an excellent grinder.

    I think Chris of Talk Coffee has used a number of different Rossi grinders over the years so if anyone can give you an opinion, Chris should be able to....

    Anyway mate, all the best..... :)

    Mal.
    Hi all,

    Yeah- I have used way too many Rossis in my time ::)

    TG, my experience on the MC is too long ago and I honestly dont think I would have been able to tell the difference at that stage anyway. I looked quickly for some MC specs but didnt come up with anything....

    At the time, we used Rossi conicals because our cafes were busy and we needed the speed. We also received them simply by asking our coffee supplier. How things change!

    I *think* the key differences between the planar grinders and the conicals is that conical burrs run much slower- typically 300-400 rpm v circa 1400rpm. This most probably allows more coffee chemistry to be in the shot rather than taking place as the beans are ground, Ultimately, though the answer will be on your palate. If you think you can perceive a difference and that difference justifies the expense, go for it!

    Chris

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    Re: Rossi MC burr size

    Cheers Mal

    The info that you and Den have given I can throw to my daughter, who finished Mech Eng last year, to give me a better explanation in idiot terms. *:-[

    You guys gave me enough to translate the basics to her.

    Cheers

    Chris

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    Re: Rossi MC burr size

    Google Titan Grinder Project.

    One of the points to note in the above is that the Super Jolly with flat burrs came very close to the Robur in the testing but just not as consistent as the conicals.

    P.S. Rossi grinders have a very good rep.
    Some light reading! :P

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    Re: Rossi MC burr size

    Cheers runfast

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    Re: Rossi MC burr size

    TGP didnt impress me much

    1) you cant rescore in the middle of the comp and still keep scores valid
    2) I drink a range of beans and think the testing only holds true if you vary the test across a full range of roast levels, origins (I prefer single origins from high-end roasters for their complexity), bean sizes (eg. peaberry vs. AA). Im sure that a really dark roast, like Intelligentsias Black Cat, might perform very differently to HDs Haile Selassie Sidamo Dry Processed across a range of grinders, and Id never bet on any one grinder beating another in the cup

    I would agree that large conicals have always impressed me for speed and consistency, even if, like all things in life (except wives!) there are compromises, and a high price tag.

    Im sure a super jolly might be a better grinder (or a major, for instance), for ~X% of coffee, but for me, conicals have highlighted the nuances in flavour and scents that make coffee the enjoyable experience it is to be, instead of just a hot chocolate alternative. Id sell my car, espresso machine and my wifes piano, even my TV, before I sold all my conicals.



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