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Rancilio Rocky grind setting slips during grind
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mallen222
Senior Member


Joined: 15 Jun 2014
Posts: 1
Location: Minneapolis
Expertise: I love coffee

Posted Sun Jun 15, 2014, 5:10pm
Subject: Rancilio Rocky grind setting slips during grind
 

While I'm grinding my Rocky, the grind setting slips sometimes. For instance, I'll set it to 30 for a pour over and after a few seconds of grinding it will switch to 32 or 34 at which point I stop grinding and set it back to 30.

BACKGROUND:
I recently bought a used doserless Rocky. It's from 2005 and advertised as "gently" used meaning just a few grinds per week. I brought some beans with when I bought it and tested it out, it seemed to work just find on a few different settings. I mostly focused on the finest setting and the coarsest setting when I was testing.

I brought it home and took off the hopper and top burr to clean everything out. It ran much quieter after the cleaning (it had never been cleaned) but now it slips - mostly in the middle settings around 30. I'm not sure if it was broken when I bought it or if I did something when I opened it up.

WHAT I'VE TRIED:
I took the hopper off and made sure there was nothing keeping the hopper from screwing down tight, there's a pin that fits into the pockets of the hopper and I was concerned the hopper was just too high. I also made sure to screw the hopper down tight for the same reason.

I also checked the stopping pin (the spring loaded pin the pushes into the pockets in the hopper) and it didn't seem broken - it still has some spring and the pin isn't broken off.

Some numbers seem to be worse than others so I looked at the bottom of the hopper and the pockets didn't look to be worn out. They weren't totally stripped at least. If the pin only goes in 1mm then I might have missed the problem.

SO...

Has anyone had a similar problem? At this point I'm guessing there's a problem in the pockets of the hopper or the stopping pin. I'm looking at buying a replacement hopper to see if that fixes the problem but I thought I'd ask around here first. I don't really want to return the grinder to the guy in Craigs List because I'm not sure if it was broken when I bought it and the grinder will still be a pretty good deal even if I have to replace a few parts. Thanks for your help!
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