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Mazzer Mini E Grinder Mod | Super Jolly Burr Set

Posted on February 5, 2014 by Venia Coffee Roasters | Keith There have been 4 comment(s)


If you have been stung by the coffee bug, chances are you are constantly looking for ways to improve the brewing process to get the most out of every bean.  Just about 20 years ago I was a poor college student and I bought my first air popcorn popper from the local Goodwill and started the adventure of learning how to roast coffee.  It was only a few weeks later that I was trying to modify the air flow to achieve a more even roast.

Over the years, there are few coffee gadgets that have made their way to my kitchen counter that I have not tinkered with to some extent, some with quite successful results and some not so much (before doserless espresso grinders were popular I cut the plastic doser off my first burr grinder with a dremel tool...that poor little Gaggia...).

Perhaps one of the most frequent questions I have been asked regarding grinders lately is whether or not the Mazzer Mini Electronic espresso grinder burrs can be replaced with Mazzer Super Jolly burrs (AKA Mazzer Normale).  On paper, it would seem that they would work, same dimensions, same 3-hole screw pattern.  The only difference is the more aggressive burr design.  Having heard of these being successfully installed on Mini-E's, we thought we would give it a go.  We have been very impressed with the results.

Before swapping out the stock 189D burrs on the Mini-E, we ran several 17g doses of our Uganda Mt. Elgon Natural coffee that was dialed in for an espresso grind.  Grind time was between 20-22 seconds.  After the swap with Super Jolly 33M burrs, the same 17g dose dialed in for espresso took about 13 seconds, a impressive improvement.

We have had about a week of use on these burrs since filming for the video and we are nothing but impressed.  Grind quality is vastly improved and extraction is routinely more uniform (viewed using La Marzocco Advanced 17g basket in a bottomless portafilter).  Cup quality is also noticeably improved with much more clarity.

A few points to note before venturing down the path of this mod.  The Mini-E burr set is specifically designed to be less aggressive than the Supper Jolly burr set.  This is likely because the Mini-E has a lighter duty 250W motor while newer Super Jolly's have a larger 350W motor with a bigger duty cycle.  While we haven't noticed or heard any signs that the Mini-E motor is being pushed beyond its capacity, we cannot recommend this Mod for anything beyond light-duty use.  I also feel the need to note, that older Super Jolly grinders have 250W motors and have run for years with heavy and frequent use, but swapping the stock 189D Mini-E burr set with the 33M Super Jolly burr set will void any warranty, so M.A.Y.O.R. (Mod At Your Own Risk).

This post was posted in Random Thought, News, Coffee Education and was tagged with Mazzer, Mazzer Grinders, Mazzer Mini E Burr Swap, Tutorial, Coffee Grinder Mod

4 Responses to Mazzer Mini E Grinder Mod | Super Jolly Burr Set

  • Keith
    Keith says:

    There is a marked improvement in performance using the Super Jolly burrs. We have performed this burr switch on multiple Mini-E grinders and all have a marked speed improvement regardless of burr age and use. In fact, new burrs need a break in period and speed actually slightly increases over time for most burr grinders. We believe from the evidence we have seen and measured, that the more aggressive Super Jolly burr set shows a marked grind speed improvement. Please note, that performing this modification will void your warranty on your grinder.

    Posted on July 17, 2014 at 11:29 am

  • Lars Harrekilde
    Lars Harrekilde says:

    Interesting mod. I am going to buy new burrs for my Mini E. I am inclined to get the Super Jolly burrs for it, but I am not 100% sure if the difference you and other experience is primarily caused by new versus old burrs or that it in fact is the mod itself: putting different burrs in the grinder.

    Did you compare the new Super Jolly burrs to new / barely used stock burrs? If not, would you still attribute the difference in grinding QUALITY to the more steep SJ burrs versus the stock ones, or would the difference more likely (or just as much) be determined by used versus new burrs?

    Thanks for sharing this mod anyway.

    Posted on July 17, 2014 at 4:00 pm

  • Lars Harrekilde
    Lars Harrekilde says:

    I am convinced that there is a clear improvement in terms of grinding SPEED using Super Jolly burrs as you and others has measured this. However, I actually prefer not to have a shorter grinding time since I use my Mini E at home only. My question is regarding the QUALITY of the grind: less clumping, more uniformity etc.
    Is the observed improvement in grinding quality (going from stock burrs to Super Jolly burrs) solely caused by the Super Jolly burrs, or would you see a similar improvement if you put brand new stock burrs in the grinder? That's my question.

    I noticed in a forum discussion about this mod, that someone with quite new stock burrs didn't experience much difference in grinding quality when changing to Super Jolly burrs. This is why I ask if the stock burrs used in the comparison are new or not

    Posted on July 18, 2014 at 1:07 am

  • Venia Coffee Roasters | Keith

    Speed is likely the biggest improvement of this modification, with a notable improvement of grind uniformity. However, when it comes to issues like static and clumping, these are so dependent on factors like bean density, humidity, roast degree, time off roast, etc, that it is difficult to make a across the board judgement. Anecdotally, I would say that faster grinders tend to have less clumping and static issues.

    Posted on August 4, 2014 at 4:08 am


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