Advanced Espresso

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Grinder Design

Æ 2.05 Glossary and Recap


  • Burr size, sharpness, and alignment have measurable effects on the grind size distribution. That is why these factors are so important in brewing.
  • A grinder in use creates heat, which increases the temperature of the ground coffee. In some cases this temperature can rise to as high as 100° C (212° F).
  • These temperature changes affect shot time and extraction.
  • The effect of temperature changes seems to relate not to metal parts expanding in the grinder,