Difference between Mazzer Mini E burrs and Super Jolly burrs?

Grinders are one of the keys to exceptional espresso. Discuss them here.
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HB
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Postby HB » Mon Apr 28, 2008 8:45 pm

blu wrote:I use the sj (which afaik has the same burrs as the mini e)...

According to the parts list, they don't. Mazzer lists the replacement Mini E burrs as 189D and the Super Jolly as 33M, though they are both 64mm. I don't have them side-by-side to compare, but I assume the former burrs have a less aggressive cut so as to not overtax the Mini E's less powerful motor (250W versus 350W).


...split from Mazzer Mini E owners: To WDT or not? by moderator...
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Postby blu » Tue Apr 29, 2008 1:30 am

hello dan,
you are right, there a 2 different mazzer 64 mm burrs: they have the same bean-breaking zone but different fine grinding zones. I'll post a pic as soon as possible (sorry, I am at work).
I thought that it's possible to use them both with both machines.
thanks for your hint,
cari saluti blu

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Postby KimH » Tue Apr 29, 2008 4:55 am

Can the Mini use the SJ burrs without problems? And how much faster will it be then?

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Postby HB » Tue Apr 29, 2008 7:10 am

KimH wrote:Can the Mini use the SJ burrs without problems?

Mazzer puts a lot of design time into their grinders; I doubt they would cut two different burr sets if they were interchangeable.

I predict the Mini E would have trouble with stalling if you installed the Super Jolly burrs, similar to the Super Jolly reports of stalling for the more aggressively cut Duranium burrs. Reading the patent for the dosing mechanism, it may also affect the accuracy of the metered dosing (i.e., the patent explains the screen on the chute's exit is used to create backpressure, which leads to more accurate shot-to-shot dosing). It's only a guess, but I think it would also heat the grinder up more quickly:

Image
From Mazzer Mini E Doserless review

I searched and found some other burr related discussions on TMC: Problem with Super Jolly.
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Postby KimH » Tue Apr 29, 2008 8:25 am

HB wrote:Mazzer puts a lot of design time into their grinders; I doubt they would cut two different burr sets if they were interchangeable.

I predict the Mini E would have trouble with stalling if you installed the Super Jolly burrs, similar to the Super Jolly reports of stalling for the more aggressively cut Duranium burrs. Reading the patent for the dosing mechanism, it may also affect the accuracy of the metered dosing (i.e., the patent explains the screen on the chute's exit is used to create backpressure, which leads to more accurate shot-to-shot dosing). It's only a guess, but I think it would also heat the grinder up more quickly:

<image>
From Mazzer Mini E Doserless review

I searched and found some other burr related discussions on TMC: Problem with Super Jolly.


Interesting thread! I can see some possible issues about using SJ burrs in a mini E, but has somebody actually tried it? Maybe it will work great at home with only a few espresso's each day?

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Postby blu » Tue Apr 29, 2008 2:23 pm

KimH wrote:Can the Mini use the SJ burrs without problems?
hello kimh,
the mini has smaller burrs than the mini e! mini e and sj burrs have the same dimensions (diameter,...).
cari saluti blu

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Postby blu » Tue Apr 29, 2008 5:15 pm

hello,
at home I found some pics of my mazzer sj burrs:

1) new model:
Image

2) old model:
Image

the grinding zones are completely different!
I asked a friend of mine to send me a pic of the mini e burrs as I don't own one...

cari saluti blu

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Postby blu » Wed Apr 30, 2008 5:41 pm

hello,
big surprise: the mini e has completely different burrs:

Image
(thx apfeltiger from kaffee-netz.de for the picture!)

cari saluti blu

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Postby HB » Wed Apr 30, 2008 9:50 pm

blu wrote:big surprise: the mini e has completely different burrs...

Wow, there's no confusing those two! I'm not sure how to interpret the difference; it looks like the Mini E burr has a longer cutting edge and less bean breaking area. To slow the speed of the feed into the fine grind surfaces?
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Postby another_jim » Thu May 01, 2008 10:04 pm

The three burrs have inversely related bean grabbing areas and steepness of the fine grinding burrs. Apparently a small grab area allows for the steeper more aggressive burr angle because, as Dan says, fewer beans are entering at any one time.

It's simple geometry to figure how the burr steepness affects grind speed, but I have no idea how to relate the bean grab area to the grab rate.