This is an elementary school, intro to algebra, problem. "Al has a grinder that will need replacement burrs after he has ground 200 Kilos of coffee. If it takes 14g to make a double shot, and one gram of coffee is wasted, how long before Al will have to change his burrs if he has two double shots every day?" At that rate, every year Al grinds around eleven kilos of coffee (30 grams x 365 days = 1095 g or 10.95 Kilo) every year. At just over two years, I'd estimate that singforsupper has ground around twenty-four Kilos of coffee, being generous, on his mini. This means that his mini is doing less work every year than most grinders in even the slowest of shops are doing every month, and some shops will do every week. You should replace your burrs every ten years, though, just as a habit. That simple equation could be reproduced by the week if you don't really have a daily regular habit. I'll have two a day, sometimes three, and sometimes none, at my house. (I have a Sylvia and Rocky at the GF's house), but I'll go through at least ten deep doubles (21g, with waste) or shallow triples, whatever you prefer to call the 18G basket, a week. That puts me in the same area as singforsupper, but the Major's need a bit less frequent attention.
singforsupper Senior Member Joined: 22 Feb 2005 Posts: 539 Location: NY State Expertise: I love coffee
Espresso: Fiorenzato Bricoletta Grinder: Mazzer Mini E Vac Pot: - Drip: French Press Roaster: Caffe Fresco-Tony Sciandra...
Posted Sat May 26, 2007, 7:10am Subject: Re: Mazzer Mini burr replacement
Thanks for your elementary math. It's quite entertaining! These were all helpful posts. It would be good if someone could chime is with the symptoms of a dulling burr. That would be great to know. TIA.
Coffee, I must have coffee, And if anyone wants to give me a treat, Ah!, just give me some coffee!
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 8,151 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Vene. A1, La Cimbali M32 Grinder: Azkoyen Capriccio, Major Vac Pot: 40s era Silex Drip: Msl. Com. brewers Roaster: gave it a try, decided no
Posted Fri Oct 26, 2012, 5:53am Subject: Re: Mazzer Mini burr replacement
I will give it a shot. When you disassemble the grinder for cleaning and the burrs no longer will catch your fingernail and it just slides over the edge of the burr, it might be time to replace them. That is the more or less objective test I use when looking at used grinders as to if I should change the burrs. YMMV.
In real life, my name is Wayne P. Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!
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emradguy Senior Member Joined: 31 Mar 2011 Posts: 3,513 Location: Houston Expertise: I live coffee
Espresso: Duetto II; Twist v2 Grinder: M Major, Macap M4, Pharos,... Drip: Espro presses; Aeropress Roaster: H-B "List of Favorites"
Posted Wed Oct 31, 2012, 6:01am Subject: Re: Mazzer Mini burr replacement
I wrote to Macap through their online "contact us" page, and they got back to me very fast. They recommend burr replacement after about 200kg, which I guess is about the norm, huh? I'll still try the fingernail catch technique, but it sounds like I have at least another couple/few years on my older grinder.
. Always remember the most important thing is what ends up in your cup!
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