benpiff Senior Member Joined: 5 Feb 2010 Posts: 295 Location: Portland, OR Expertise: I live coffee
Espresso: RocketR58,GrimacMini,Elli Grinder: LSM FK Conical, Vario Roaster: Sonofresco 1lb, Behmor
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!
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 7,479 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!
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