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Rocky Grinder vibration and noise
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Discussions > Espresso > Grinders -... > Rocky Grinder...  
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clanofwolves
Senior Member
clanofwolves
Joined: 27 Nov 2012
Posts: 2
Location: Raleigh, NC
Expertise: I love coffee

Posted Tue Nov 27, 2012, 2:01pm
Subject: Rocky Grinder vibration and noise
 

I have had and loved my Rancillio dozer-less Rocky Grinder for many, many years, it's the best grinder ever!

However, I have had an issue over the past few months. I'm not sure if this is a troubleshooting type forum, but I'm gonna give this a try:

Six months ago, my grinder began making a loud buzzing/horn sound and vibrate violently when the grinding process was engaged. Also, the motor would stop abruptly and not spin down as it would during the prior years of use. I disassembled the grinder body and components, thoroughly cleaned everything, and re-assembled it. Upon post clean-up start, the grinder acted in the exact same fashion as noted directly above. Frustrated, but knowing that the grinder was grinding, I continued to use it regardless of the noise/vibration. Happily, the noise/vibration went away two days later and it remained 'normal' for over four months. Sadly, the noise/vibration returned a month ago and stopped again for three days, but has been consistent ever since.

Only benefit is, it get's my teen girls out of bed easier plus, the vibration tamps the ground beans as it dumps it and it's easier to tamp.

Anyone have an issue such as this?

Really strange.....
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,740
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Nov 27, 2012, 2:36pm
Subject: Re: Rocky Grinder vibration and noise
 

Hi, welcome to the board.

The doSer is a personal choice thing and there is no benefit to the shot either way, I'm glad you like a grinder without a doser.

Best grinder ever? Well, not so much, years ago it was a very good bang for your buck but there are better grinders out there now so as my guess is that the bearings may be bad, it might be time to upgrade to a grinder that does not have the issues of large steps and, by todays standards, only so so performance in grind quality.

You might want to think about the Vario. It is a nice multi brew grinder that pulls great shots and still grinds for drip or press pot.

There isn't much inside the grinder but the bearings, burrs, carrier and grind adjustment. If you took it all apart and all looks good, see if there is any play in the lower burr on the motor shaft. It is the shaft that you are looking at.

YMMV!

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 3,066
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Tue Nov 27, 2012, 2:46pm
Subject: Re: Rocky Grinder vibration and noise
 

clanofwolves Said:

I have ... Rocky Grinder ... it's the best grinder ever!

Posted November 27, 2012 link

Yeah...I went from a whirlybird to a Solis Maestro to the Rocky...and thought was you think for a while.  I eventually realized that I had to alter my dose to get my extractions to run correctly on a consistent basis.

Then I did a little research and bought my first Macap M4...wow! what a huge upgrade from the Rocky! Is my Macap the best grinder ever...not even close, there's a whole plethora of commercial grade grinders out there that are better...i.e., they produce a better quality grind and (all other parameters the same) enable one to make better espresso shots.

All to say, yeah, the Rocky is pretty good, but there are much better grinders available...so, if upgrading is an option for you, I'd recommend considering that route.

 
.
Always remember the most important thing is what ends up in your cup!
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clanofwolves
Senior Member
clanofwolves
Joined: 27 Nov 2012
Posts: 2
Location: Raleigh, NC
Expertise: I love coffee

Posted Tue Nov 27, 2012, 5:10pm
Subject: Re: Rocky Grinder vibration and noise
 

Thanks for the feedback and my quoted comment 'the best grinder ever!' was meant to be a tong-n-cheek, with my problem and all. I'll check the play in the shaft, but I'm pretty sure this motor is not serviceable; at least Rancillio doesn't plan it to be for they only sell new motors, no parts for them.

Also, thanks for the advice on possible replacement units. I'll maybe look into those as well. The grinder is seven years old and is used 2-10 times a day...so we've done pretty good $$$ wise.

Again, Thanks!!

Dave
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