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Grinding fresh with a quality burr grinder is the largest contributing factor to making better coffee. To ensure your consistently produce a great tasting cup, burrs need to be cleaned frequently, after every 30-50 cups or so, or at least once a month. Burrs need to be replaced as soon as your coffee begins to taste dull, or you notice a difference in the quality of your grinds.
Depending on how hard the beans are, how frequently you grind and how fine your typically grind, burrs can last around 3-5 years. Light roasts are much harder than dark roasts and will wear down burrs faster too. Fine grinding for espresso reduces a burr's lifespan more than courser grinds like pour over or AeroPress.
5 signs your coffee grinder burrs need replacing.
The following burrs are available for the Chestnut C, C3, C3 Pro, G1.
Your new burrs need to be seasoned to settle in and remove any factory protective oils and residues. It's best to use stale coffee as not to waste the good stuff. About 1 dose of coffee should do the trick.
What's in the box:
1 x TIMEMORE Chestnut Grinder Standard Burr Set