Question about Rancilio Rocky Espresso Coffee Grinder - Doser

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Rancilio grinder does not grind fine enough for espresso

For about 3 years I've been able to grind fine enough for good espresso. All of a sudden, I can't get a fine grind. I've unscrewed the top grinder, cleaned out the machine, rescrewed the top grinder down as tight as possible and the grind is even worse. The two bur grinders don't seem to get close enough to each other to grind fine. The threads are screwing in properly (not cross-threaded). Any ideas?

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  • Anonymous Jan 31, 2009

    I have a similar problem. Grind is no longer fine enough. The coffe ground container has a screw in its base to stop you from letting both grind wheels touch but on my unit it was bent out of shape (don't think I did this) I removed it and now go beyond "zero" grind without letting the wheels touch but the ground is still to rough and the pour too fast. I'll try and remove the top wheel and clean the wheel as you suggest.

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Posted on Jul 09, 2009

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After taking the top burr off several times and rescrewing it, I finally was able to exert enough force to get it to turn a couple of extra turns. Evidently there was some oil or coffee gunk (although I could see none) that snagged the bur. Now it appears to work as before.

This is a great, service by the way. Even the process of thinking through the problem so I could post it helped me solve it.

Posted on Nov 23, 2008

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1 Answer

We have a sunbeam cafe series coffee machine that is 2 years old but suddenly under extracts on the pour and cannot reach the extraction pressure we are used to. We grind our own beans as well.


Generally, this is not a problem with the machine but with how you're loading the coffee! Sounds typical of one of these problems:-

Not enough coffee in the basket
Coffee should be filled and tamped to about 3mm below the rim.
Coffee grind not fine enough (too coarse)
Do you grind your own coffee or buy ready-ground? If buying ready-ground, make sure it is for espresso (fine) and not for filter or plunger.
If you have your own grinder, (like the Sunbeam Conical Grinder), then make sure the coffee hopper on top is securely connected to the grinder. I'd been using mine for years on the the finest grind (1) not realising the hopper wan't on right. Only discovered it when I took it apart to clean. Now my grinder is on 9-10 to grind for espresso.
Coffee not tampered down hard enough
You do need to provide a reasonable degree of pressure to tamp the coffee down just right.
Group head not turned tight enough
Push the group handle as far to the right as it will go, then ease it back just a fraction to have the right pressure.

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Our Silvia, almost 8 years old, is putting out shots too fast (10 to 15 seconds), even though we've been dialing down the grind on Rocky more fine, putting more coffee in, and tamping harder. We...


Try to redo what you have been doing, but set it to the extremes to see if everything is functioning. If you set the grind say to 4, it should come out very slow or maybe not at all.

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In the past I have cleaned the grinder blades 4 times however this time I noticed some of the grind mixture winds up on the counter under the main motor of the unit. When I picked up the grinder and shook...


Have you tried to hoover up the grinds from time to time, from the grinder blades. The coffee beans and ground can gather under the blades from over time. It should not be a problem though.
For better crema you may want to replace the blades.You should replace every 3-6 years. Rancilio Rocky Grinder Flat blades

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Have Rancilio Rocky for about 3 months. Noticed grinds around base from time to time. Yesterday picked up machine, saw accumulation. Tapped base, more came out. Took off base, about 2 oz. of grinds inside....


Hi There could be a piece broken around the chute where it comes out of the grinder and enters the grounds chamber. There is a rectangular opening in the plastic that can get broken causing the grounds to enter the machine.

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Not fine enough grind


This model grinder won't do espresso. There is a DIY mod available online that involves disassembling the machine, and recalibrating the burrs to produce a finer grind. I did it on mine, it was definitely better, but it's not going to get you to the coveted 30 second pull for your espresso. Search on Starbucks Barista Grinder Mod. It is a great grinder otherwise, very reliable.

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Try backwashing the group with purocaff.
Are you using coffee ground at the store or do you grind just before use?
How fresh is the coffee less than a month or more?
If more than a month(whole beans) it is no longer useful.
If more than a 3 days(ground), that is stale also. It will be very diffucult to get good espresso from that(not impossible, but difficult).

If using store ground, it cannot be ground older than a week(coffee loses flavor and taste minutes after being ground). Try getting less coffee more often and adjust the grind setting that you use. If you have always used setting 3 on the store grinder try 2.5.
If grinding at home adjust the settings on the grinder to a slightly coarser grind and fill the portafilter slightly over the top of the basket, now tamp to the indent(fill line) in the basket. that should be sufficient to pull a great shot.

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Rancilio rocky grinder setting


to get starting point you adjust burrs to touch each other. when they touch each other you have finest grinding, after you hear metal voice you turn back 3 dots and grind only for 1 dose. you check it, if it goes to slow, you go one more back and clean gruinder, THAN you grind 1 dose more. 2 or 3 times and you will get perfect grinding.

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Adjusting grind on Rancilio Rocky


  1. because it didn't work a wilde the upper burr holder could be jammed, carefully take id off, clean it good and then put it back until you touch lower burr with the upper.
  2. to get starting point you adjust burrs to touch each other. when they touch each other you have finest grinding, after you hear metal voice you turn back 3 dots and grind only for 1 dose. you check it, if it goes to slow, you go one more back and clean grinder, THAN you grind 1 dose more. 2 or 3 times and you will get perfect grinding.

Dec 09, 2008 | Rancilio Rocky Espresso Coffee Grinder -...

1 Answer

Coffee not strong enough


I had a problem like this with my first proper Gaggia. Cutting a long story short I found that the coffee I was using wasn't ground finely enough. The Illy stuff that comes in cans was ok, but pretty much everything else preground (incuding Lavazza!) was too coarse.

Sidestep the problem by getting yourslef a Rancilio Rocky grinder then you can adjust the grind in TINY increments for your perfect coffee moment...

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