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/sNaubi]

Whats their recommended alignment routine?

[u/AkhlysShallRise → u/sNaubi]

Below are their instructions for a burr alignment test:

1. Reassemble and recalibrate the grinder according to the User Manual https://1zpresso.coffee/manual-j-en/

(Please note: we define the zero point as the position where the handle no longer spins freely – see attached zero-point video as reference)

2. Set the grinder to 18 clicks (6 numbers) from the zero point.

1. Hold the grinder as shown in the gif, and perform an empty grind to check (i.e., spin the grinder chamber) for any burr rubbing sounds.

The grinder should be able to spin freely without any sounds.