This is an interesting topic as it seems to me that most people grossly under-estimate the lifespan of the burrs.
My coffee usage is say 40 x 365 grams. Say about 15kg per year. The burrs are rated, I have heard for about 600kg of coffee. The grinder is 10 years old or thereabouts. It has therefore had about 150kg of beans through it which means the burrs are 25% worn.
I stripped it down and looked at the burrs a few days ago and cleaned everything. Looks good. I wouldn't replace the burrs based on espresso, these estimates or what I could see.
A commercial grinder with flat burrs will do usually 800kg of beans. In a cafe, let me guess. Say 10 grinds per hour of 20g is probably a reasonable estimate for a day over say 10 hours. 2kg per day or 720kg per year so burrs will need replacing every year.
I wonder how many people objectively consider this as CSers are always talking about replacing burrs. I would think unless your beans have nuts and bolts in them that it is unnecessary for most people to EVER change the burrs in the lifetime of a home grinder.
My coffee usage is say 40 x 365 grams. Say about 15kg per year. The burrs are rated, I have heard for about 600kg of coffee. The grinder is 10 years old or thereabouts. It has therefore had about 150kg of beans through it which means the burrs are 25% worn.
I stripped it down and looked at the burrs a few days ago and cleaned everything. Looks good. I wouldn't replace the burrs based on espresso, these estimates or what I could see.
A commercial grinder with flat burrs will do usually 800kg of beans. In a cafe, let me guess. Say 10 grinds per hour of 20g is probably a reasonable estimate for a day over say 10 hours. 2kg per day or 720kg per year so burrs will need replacing every year.
I wonder how many people objectively consider this as CSers are always talking about replacing burrs. I would think unless your beans have nuts and bolts in them that it is unnecessary for most people to EVER change the burrs in the lifetime of a home grinder.
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