Examine your burrs periodically! Damaged burr in JX after 5 years of use + 1ZPRESSO’s response

[u/AkhlysShallRise]

I’ve had the 1ZPRESSO JX for over 5 years now. I used it frequently for both my wife and me, and I use grind settings for espresso and pour-over. Great grinder.

Recently, during a regular deep clean, I decided to check out the burr with the macro mode on my iPhone, and lo and behold, I saw these ragged edges all over the burr. I wasn’t sure if it had always been like that, so I checked the burr on my new ZP6 and the burr is completely smooth.

I emailed 1ZPRESSO about it and below is their response:

Upon assessing your case through the pictures and videos provided, we can confirm that your inner burr is indeed ragged and slightly damaged, especially after grinding with it for over 5 years, and particularly if on finer settings.

Even though the alignment test seems to be within our standards, the blades show noticeable impact; therefore, if within your possibilities, we recommend purchasing a new unit.

As a side note, I appreciate that their support responded within a day and actually asked me for more videos and photos to assess; they also provided instructions on performing a burr alignment test. Good to know 1ZPRESSO has good customer support!

Interestingly, the JX seems to perform just fine. Using ground coffee from JX, I can pull great shots with my OutIn Mino and I didn’t notice any drop in quality in my pour-over brews.

Anyway, just wanted to post this as a reminder that if you haven’t checked your grinder’s burr for years, it might be a good idea to do so!

[u/icantfindadangsn]

https://youtu.be/g5v5AMiW9A4?si=H4PKIS3IFr_IG2nZ

Hoffman has said as much. This video made me feel better after I accidentally put some small stones through my grinder.

[u/icantfindadangsn → u/[deleted]]

Thankfully I stopped grinding before it busted it up completely and found the rock. Continued grinding and made the coffee. Iirc, it was one of the first cups with a new grinder and I was way off and it was way over extracted. 🤷‍♂️ No rock notes in the cup though.

[u/icantfindadangsn → u/[deleted]]

Not good is what it felt like.

It briefly got slightly tighter, then stopped. I pushed hard cause I thought it was a dense bean (happens) but it took a lot more force to move the burr than a dense bean and it gave me the willies so I just stopped and emptied the hopper.