A grinder seal is a small sealing ring (O-ring) that sits between the chambers in a grinder. It ensures that the grinder turns smoothly, doesn't rattle, and closes tightly – so none of your material is lost.
What is the grinder seal for?
The O-ring has two functions: it holds the grinder halves neatly together and allows them to slide smoothly. Without it, the grinder would wobble, rattle, and let material pass through the joints. An intact sealing ring makes the difference between a cheap and a pleasant grinding experience.
When should you replace it?
O-rings are wear parts. If the grinder becomes stiff over time, rattles, or feels loose, the seal is usually worn out or dirty. A replacement ring is inexpensive and quickly changed – often a thorough cleaning is also sufficient.
Frequently asked questions
My grinder is jammed – is it because of the seal?
Possibly. However, residues between the teeth are more often the cause. First clean, then check the seal.
Does every grinder seal fit every grinder?
No, O-rings come in different sizes. Pay attention to the correct diameter for your model.
How do I clean the seal?
Remove, clean in rubbing alcohol, dry, and reinsert. See also Grinder Cleaning.
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