HoldTheOnions wrote:I did a dozen or so immersion cold brews and it seemed the least demanding brew method I've tried so far, but anyone correct me if that is wrong. If you are brewing this way, then I'm thinking a used Bunn and new set of burrs would get the job done for cheap. The other way I don't know.
I've found the grinder as important for cold brew as it is for any the other coffee prep categories. I've been serious about cold brew for over 5 years and have provided concentrate for two beer micro breweries for some special high end limited release barrel aged runs of theirs.
This past summer not wanting to lift & transport my Ditting KF 804 to the Brewery I did some tests comparing the output from my Bunn FPG to the Ditting. The fines from the Bunn were obvious and excessive compared to minimal from the Ditting, I already knew the difference the grind made so I ended up lugging the Ditting along.
My top two choices (actual 3 if you include SSP burrs, these are clearly better) is the EK 43, Ditting/Tanzania/Bunzilla, or SSP equipped 80+mm burr grinder. The Socratic grind studies provide adequate evidence for the best unimodal grinders.
If you expect to be grinding a very large volume of beans in a short period of time you want the EK43, it's output is about 3x my Ditting. The 804 Ditting is right around a lb of coffee a minute. Then not to overheat the coffee the grinder needs to rest about 5 minutes before grinding more.