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Thread: Rancilio Rocky grind level for espresso?

  1. #1
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    Rancilio Rocky grind level for espresso?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    greetings

    just curious - what grind level is best for espresso using Rocky grinder ?

    assuming burrs are in good condition and beans are fresh and are ground on demand.

    I tried level 7 and 6 and 5, not quite sure what is best, typically I use either 5 or 6.....

    thanks

  2. #2
    mjs
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    I am finding that I get best results (60ml double shot in ~25-30secs) on 2 or perhaps 1 if the beans are a little older. So I don't have much room to move. That's with about 17g of coffee, maybe I need to up the dose. It gets a bit clumpy on such fine grind settings.

    Rocky is a few years old, have cleaned and checked the burr zero calibration, so I don't appear to have much room to move. I haven't exactly punished it over the years, doubt that I would have put more than 20kg through it.

  3. #3
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    it suggests that the grinder needs to be recalibrated to zero.
    This does require removing the bean container (three screws in the centre of the container) . If I remember correctly there is a self tapping screw that stops the adjustment just before the blades touching. It sounds like that your 2 should be around 5 or 6. If this is too vague I can pull my rocky down.

  4. #4
    Senior Member Lovey's Avatar
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    G'day Acid rider,
    The numbers are just a reference point for when you move from different grind sizes. Your 'true zero' may be 9, or any other number depending on how the burrs have been assembled.
    Check this link that Mal put up in relation to zeroing in the Rocky.
    http://coffeesnobs.com.au/grinders/2...true-zero.html
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  5. #5
    mjs
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    Quote Originally Posted by dumiya View Post
    it suggests that the grinder needs to be recalibrated to zero.
    This does require removing the bean container (three screws in the centre of the container) . If I remember correctly there is a self tapping screw that stops the adjustment just before the blades touching. It sounds like that your 2 should be around 5 or 6. If this is too vague I can pull my rocky down.
    If you read my post, I did say I had recalibrated the burrs to zero, On the scale, the true zero is actually about -1 or -2, so I didn't try to shift the stop screw. My grind setting of 1 is still pretty low.

  6. #6
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    mjs, yes I did read your post. I realised that I wrote the wrong info. I tried to delete the post but it would not delete!
    Even so 1 is still very close to zero. If the taste is good then great.

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    Cleaned a friends ones and re calibrated it today. Looks good at about 5. Let's just say she got the hint when I said no to a coffee.






  8. #8
    Senior Member Logga's Avatar
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    Man that's one sad, neglected grinder. Lucky you were able to save it!

  9. #9
    mjs
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    Phew, mine didn't look anything like that!!

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    Quote Originally Posted by Logga View Post
    Man that's one sad, neglected grinder. Lucky you were able to save it!
    Cheers. I will be dropping it off and will give her a quick lesson on how to regularly clean it.

    put it all back together and adjusted grind. pulled a better shot than my mignon and bezzera do
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  11. #11
    Life-long Learner DesigningByCoffee's Avatar
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    Uuugh that looks like the wheel bearings from my '71 FJ40 Cruiser!
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  12. #12
    Senior Member artman's Avatar
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    Was it grinding vegimite?

    Cheers

  13. #13
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    Quote Originally Posted by artman View Post
    Was it grinding vegimite?

    Cheers
    at least if it was vegemite I wouldnt have minded the smell

  14. #14
    mjs
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    This post could quite easily go in an adjacent thread on what grinder to choose to replace a Rocky doserless with (Macap M4D is probably my preference), but this thread is talking about grind settings, so here is a bit of my experience this morning. Firstly equipment etc, Rocky Doserless, Expobar Minore III, jewellers scales, triple shot basket on naked portafilter, double shot basket in normal portafilter, Joe Frex digital timer. Beans from Industrial Coffee, Fitzroy St blend, bit over two weeks old. Strong latte is my coffee of choice, followed by long mac.

    Firstly grinding at 2 using 20g, naked portafilter, firm tamp. The shot is ok, but got about 70ml espresso in 25sec

    Then went to 22g, set at 2 on the Rocky, naked portafilter, firm tamp. Good shot, got about 60ml in 25sec

    Finally went back to the double shot basket, 18g, ground at 1, firm tamp, got 60ml. This was the best of the three when made up. Pic of that shot to come
    Attached Images Attached Images
    Last edited by mjs; 4th June 2016 at 06:37 PM.
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  15. #15
    mjs
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    Here is the last pic of the 18g shot, ground at a setting of 1. Very good outcome in the glass when topped up with milk. Perhaps if the beans were dead set fresh, would have had a similar outcome at a grind setting of 2. Anything higher grind setting on my particular Rocky would not work for me.
    Attached Images Attached Images
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  16. #16
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    The grind is right when it tastes good. Rocky grinders are good little beasts of a thing that will just keep plotting through beans without batting an eye but the stepped adjustment is limiting. On my old one it used to be a setting of 7 or 8 until I modified it to a screw adjustment. Either way what tastes good is how you set the grind.

  17. #17
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    Can I jump in and ask when the "burrs" should be changed ? My Rocky is about 6 years old - makes about 4 cups a day...... hasnt been cleaned out for over a year..............

  18. #18
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    Clean it, you can disassemble the burr head by unscrewing it. But I'd spend a good amount of time cleaning it and then check.

    Are the beans coming out ground or flecked with white. White flecks were an indication to change mine it looked like salt and pepper.



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