Is this normal? Rubber/silicone gasket underneath top burr
TLDR: the ring that sits bellow the top burr seems stretched out & isnt tight around the top burr, does anyone know if this is normal?
I bought my DF54 in late December 2025 from a local coffee machine & grinder distributor/company and I’ve been having issues with it ever since I got it. I felt like my grinds were always uneven, couldn’t really dial in anything but I wasn’t sure if it was user error because this is my first proper burr grinder. There’s always fines and had to take it apart very often to clean it, also whenever I hit the bellows while the grinder is on it always made noise that sounded like the burrs were touching but I wasn’t sure. Anyways I open the grinder today and my worst fears came true: marks that the burrs have indeed touched. Then I unscrew the top burr and notice a rubber/silicone gasket underneath that looks stretched. Is this normal? Would this be the cause of the burrs touching/causing misalignment? Any help would be greatly appreciated
Pic 1: how the ring appeared when I removed the top burr from the burr holder
Pic 2: mark left from the ring on the bottom of top burr
Pic 3: Top burr with wear from the burr touching