How to adjust the coarseness of a manual coffee grinder

‌The method of adjusting the coarseness of a manual coffee grinder mainly includes the following steps‌:‌

‌Determine the adjustment direction‌: First, make it clear whether you need a finer or coarser grind. Make sure there are enough coffee beans in the bean bin and that the valve between the bean bin and the grinder is open so that the coffee beans can fall smoothly into the grinding area.

‌Preliminary adjustment‌: Turn on the grinder for 10 seconds and discard the preliminary ground coffee powder to ensure that the grinding degree is not adjusted.

‌Testing and fine-tuning‌: Use the preliminary ground coffee powder to make a cup of coffee, paying attention to the accuracy of the amount, leveling, and pressing steps. Test the quality of the coffee and the extraction time by constantly adjusting the dial until the ideal coarseness is reached.

‌The effect of different grinding coarseness on the taste of coffee‌:

‌Fine grinding‌: It will increase the extraction rate of coffee and make the coffee richer, but too fine grinding may cause over-extraction and produce bitterness.
‌Coarser grinding‌: It will reduce the extraction rate and make the coffee lighter. Too coarse grinding may cause insufficient extraction and a sour taste.

‌Requirements for grinding coarseness in different brewing methods‌:
‌Hand-brewed coffee‌: requires finer grinding to ensure adequate extraction.
‌French press‌: requires coarser grinding to avoid over-extraction and affect the taste.