Fixing manual coffee grinder.

Hey everyone, I have a manual coffee grinder. It's not the highest quality, but I have to compromise until I can afford a more professional grinder.

The grinder’s main shaft sits on a threaded track at the top, which prevents it from moving down. Unfortunately, the threading at the top has been damaged.

As a result, the shaft moves downward, causing the two ceramic burrs to separate. Instead of grinding fine, it simply splits the coffee beans into 2–3 massive chunks.