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Rancilio Rocky problem, rough lower threads want to get jammed.
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Discussions > Espresso > Grinders -... > Rancilio Rocky...  
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benpiff
Senior Member
benpiff
Joined: 5 Feb 2010
Posts: 317
Location: Portland, OR
Expertise: I live coffee

Espresso: RocketR58,GrimacMini,Vetrano
Grinder: LSM FK Conical,Major
Vac Pot: Vario,Pharos
Drip: Livia 90, NS Elli
Roaster: Sonofresco ADR
Posted Tue Nov 8, 2011, 4:08pm
Subject: Rancilio Rocky problem, rough lower threads want to get jammed.
 

Hi all, I acquired a Rocky with a jammed upper burr that took a lot of work to remove. The grinder had hardly been used, but upon closer inspection the lower threads look rough with some obviously damaged parts (little nicks in the threads). Does a tap or repair tool this big exist? The upper burr carrier still looks fine.

This silver steel looking piece looks to bolt to the top of the motor, does anyone know where a replacement can be had? Or am I stuck trying to look for someone who is parting out a Rocky? If I try to thread in the upper burr carrier, it gets tight within a couple of turns and just wants to get jammed again. Thanks for any help!

Edit: I've emailed a couple shops and have heard that to replace this means replacing the whole motor. So thanks for any repair ideas or if anyone knows of a donor motor!

 
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,662
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 Wed Nov 9, 2011, 6:07pm
Subject: Re: Rancilio Rocky problem, rough lower threads want to get jammed.
 

Now you know why the grinder was for sale LOL!
At this point about all you can do Is to get a set of jewelers files and  see what you can do about filing of the rough spots

There is no easy fix for your problem other than fiddly tedious work with a file.

There are tools made for cleaning up threads that look like files but I do not remember seeing one that will match the threads in your grinder. You may be able to find a set of jewelers files that are bent on the end or have a bend in them so they can reach around places I think this would be your best bet. Good luck!

EDIT, this is a closed Ebay auction but it is the tool I would use for this job.
Click Here (www.ebay.com)

 
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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SLCCoffeGuy
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Joined: 4 Nov 2013
Posts: 1
Location: Salt Lake City
Expertise: I love coffee

Posted Mon Nov 4, 2013, 9:31am
Subject: Re: Rancilio Rocky problem, rough lower threads want to get jammed.
 

Hi BenPiff,

Did you ever get your grinder fixed? I came across your posting looking for people parting out a grinder. Are you going to part it out?:)

Your best bet is to either take it to a machine shop where they can retap it or take a small sharp object and try to clear the burr from the threads.

From my readings, this is fairly common issue on the Rocky.

Thanks
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