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Great Rocky tweak
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Senior Member

Joined: 23 Apr 2004
Posts: 248
Location: Boston, MA
Expertise: I love coffee

Espresso: Isomac Rituale, FE-AR...
Grinder: Mazzer Kony, Hario MSC-2
Vac Pot: Hario TCA-2
Drip: Hario DPW-1
Posted Sat Oct 16, 2004, 11:49am
Subject: Great Rocky tweak

Hi all,

Just tried a simple tweak for my Rocky that made it so much better that I am kicking myself for not doing it earlier.

First, let me say that I did not come up w/ the tweak. Another CG whose name I forgot posted this info in one of the messages earlier.

Anywho. One of the main complaints ppl have with the Rocky is its finite adjustment. Often I wish for another 1/2 or 1/4 click to get to that magic point. Recently I got a Pasquini K2 grinder that was advertised to have infinite adjustment like the mini mazzer. Upon receiving the unit, I realize that the K2 is not that much different than the Rocky, except that the adjustment pin that locks the hopper to a grind "click" has a very strong spring tension force. This force allows the K2 to adjust between clicks, where the top hopper is merely held by the tension force (and not locked by the pin detent.

I decided that a simple mod to the Rocky can also make it "stepless". At first I tried a chopstick shim that wedges the hopper to the grinder body. It worked for a little bit but upon couple adjustments, it gets a bit loose and thus stop working (well). I thought of drilling a hole on the side and put some sort of lock screw that will hold the top burr in place but never got around to it.

Then I remember seeing a post of another fellow CG who put teflon plumbing tapes on the top burr thread to decrease its movement while grinding beans. I tried it (only one layer is needed) and it tightens things up real nice. In fact, it's tight enough that I can have "intermediate" settings between the clicks w/out the burr getting loose during grinding. And since now the top burr movement is minimized, the grind quality have improved greatly that finding the magic spot is much much easier and repeatable.

I am sure the teflon tapes will get strip out after some uses, but it's so cheap and so easy to do that routine maintenance is not that much trouble. Plus it's an excuse to finally clean my grinder.

Anyway, give it a try. It's really worth it!


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Senior Member
Joined: 28 Jan 2003
Posts: 2,807
Location: Cheyenne
Expertise: I live coffee

Espresso: Expobar Pulsar
Grinder: Mazzer SuperJolly • Baratza
Drip: Bunn • AeroPress
Roaster: Behmor•Variacs
Posted Sat Oct 16, 2004, 1:36pm
Subject: Re: Great Rocky tweak

Hi Benjiman...
Now when the teflon tape loosens a bit, just wind scotch tape around a toothpick and wedge it between the hopper and the top of the unit.

L  a  r  r  Y


L  a  r  r  Y          J

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Elegant demitasse spoons for special occasions and everyday use.
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