There is no way to tamp too hard because espresso extraction uses nine bars of pressure, which applies 200-250 kg of force on the coffee puck—far more than the 15-25 kg a human can generate by hand—so manual tamping cannot exceed the compression already achieved by the machine.
causalpending
Evidence Quote
“No, there's no way to tamp too hard. The reason behind it is that when we extract espresso, we usually use nine bars of pressure, and this nine bars of pressure acts as a force on the top of the puck. This force is around 20 to 250 kg, typically on press. It's way more than you can tamp.”
Created: 8/13/2026, 9:53:38 AM
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