Mazzer Super Jolly Duranium Burrs at GreatInfusions

[greatinfusions]

We've got your super slicey dicey duraniums in stock for the Super Jolly...

Check it out on our mazzer page:
http://greatinfusions.com/mazzer.html

[Psyd]

We've got your super slicey dicey duraniums in stock for the Super Jolly...
<image>
Check it out on our mazzer page:
http://greatinfusions.com/mazzer.html

Call me when the Majors come in.

I offered to be a crash test dummy for the duraniums for the major, and to buy a stock set for the other Major to compare side-by-side, but never really heard if they were going to try to go forward with getting any made.
Any word at your end?

[silver2k]

Ok -- I bit.

They should arrive sometime this week. I'll let everyone know my opinion of them after I test them.

[RapidCoffee]

Me too. We've got the same machine and same grinder, so it will be interesting to compare impressions of these new burrs.

[greatinfusions]

Call me when the Majors come in.

I offered to be a crash test dummy for the duraniums for the major, and to buy a stock set for the other Major to compare side-by-side, but never really heard if they were going to try to go forward with getting any made.
Any word at your end?

For now there are no Duraniums for the Major. If the SJ sell well they will be available.

[IMAWriter]

For now there are no Duraniums for the Major. If the SJ sell well they will be available.

I spoke briefly with Angelo...a nice fellow...didn't get a chance to discuss comparisons between the standard and duranium...is it most a longevity thing, or is there a proven grind quality improvement with the duranium burrs?
Thanks for responding!

[RapidCoffee]

Michael Teahan reports greatly increased longevity with this new burrset, as well as faster grinding speed. I'm not aware of any studies "proving" that you get better grind quality. But a different grinding speed on the same grinder almost certainly implies different grind characteristics, which may or may not be noticeable in the cup.

My "duranium" burrs arrived yesterday. I'll try to find the time to mount them on the SJ this week, and will report back on both grind speed and flavor profiles. Even under the best of conditions, taste comparisons between espresso grinders are tricky, as I found out in the TGP. These will not be the best conditions, since I only have one SJ and the current burr set is three years old. But I'll do the best I can...

[IMAWriter]

I haven't removed my lower burr in nearly 2 years (I clean about every 3 weeks with Grindz, I remove all parts except lower burr, clean thoroughly, mini vac all the loose coffee and CAREFULLY re thread the top back on...
Will I have a problem removing the lower burr...ya think?

[HB]

Will I have a problem removing the lower burr...ya think?

I doubt it. Put a wide blade screwdriver between the wall of the chamber housing and lower burr carrier, turning it enough to prevent the carrier from moving. Then use your other hand to remove the screws. In the unlikely event you have a problem, a gentle rap with an impact screwdriver should do it.

[IMAWriter]

I doubt it. Put a wide blade screwdriver between the wall of the chamber housing and lower burr carrier, turning it enough to prevent the carrier from moving. Then use your other hand to remove the screws. In the unlikely event you have a problem, a gentle rap with an impact screwdriver should do it.

Thanks!

[Randy G.]

..... In the unlikely event you have a problem, a gentle rap with an impact screwdriver should do it.

Following comments are general in nature as I do not know the construction of this particular grinder (but probably apply to most any grinder where the lower burr is the moving burr, whether mounted to the motor directly or not):

The thought that came to mind when I read this was, "NO!" I would never recommend using an impact device of any kind, particularly on the lower burr which it is installed on the machine. I would recommend putting a nut driver on the center nut to hold the lower carrier which turning the screw. I have also successfully used two screwdrivers— one to counteract the torque and the other to loosen the other screw. Any injudicious impact could misalign the carrier so that the burrs will not be in parallel planes, or even damage the thrust bearing in the motor. If one is having serious problems, making a "socket" like those for 4WD front hub locking nuts (Ford and Chevy style) to fit the lower carrier if it has the ejection tabs could be a solution. But impact? I would say not even a tap on a screwdriver is a good idea.

[terryz]

Duranium is an extremely strong metallic substance used in alloys for hull construction of the starships and space stations of numerous cultures, including Andorians, Cardassians, Ferengi, Humans, Klingons, and Trabe.

Duranium interests are traded on the open market of the Ferengi Futures Exchange. Over the last three trading cycles, prior to mid-2373, there had been an increase of 7.75, a decrease of 2.125 and another increase of 11.375, making an overall gain of 17 points. That year, DaiMon Igel petitioned to Grand Nagus Zek as to whether he should sell his duranium interests on the Exchange. (DS9: "Ferengi Love Songs")

During the Dominion War, the Gallamites were supplying duranium to the Federation for the war effort. (DS9: "Penumbra") Was Oliver North involved?

Duranium WIKI http://memory-alpha.org/en/wiki/Duranium

I want some made made from Unobtianium, just as soon as I find some. I prolly left with my Snipe hunting kit.

I'm just kidding with all this....to each his own. Now I need to go finish gluing the diamonds on our Robur Burrs

[IMAWriter]

Duranium is an extremely strong metallic substance used in alloys for hull construction of the starships and space stations of numerous cultures, including Andorians, Cardassians, Ferengi, Humans, Klingons, and Trabe.

Duranium interests are traded on the open market of the Ferengi Futures Exchange. Over the last three trading cycles, prior to mid-2373, there had been an increase of 7.75, a decrease of 2.125 and another increase of 11.375, making an overall gain of 17 points. That year, DaiMon Igel petitioned to Grand Nagus Zek as to whether he should sell his duranium interests on the Exchange. (DS9: "Ferengi Love Songs")

During the Dominion War, the Gallamites were supplying duranium to the Federation for the war effort. (DS9: "Penumbra") Was Oliver North involved?

Duranium WIKI http://memory-alpha.org/en/wiki/Duranium

I want some made made from Unobtianium, just as soon as I find some. I prolly left with my Snipe hunting kit.

I'm just kidding with all this....to each his own. Now I need to go finish gluing the diamonds on our Robur Burrs

LOL...by the way,
"Do you have anything of value?"

[HB]

Any injudicious impact could misalign the carrier so that the burrs will not be in parallel planes, or even damage the thrust bearing in the motor.

Thanks for the save Randy, I was thinking of my days of youth working on dirt bikes, not precision espresso gear. D'oh!

[terryz]

Precision espresso equipment? I like dead blow hammer for these more delicate jobs. John Blackwell at La Marzocco taught me how to use it, and I must admit it fixes damn near anything.

[IMAWriter]

Precision espresso equipment? I like dead blow hammer for these more delicate jobs. John Blackwell at La Marzocco taught me how to use it, and I must admit it fixes damn near anything.

How about my wife...oops./..didn't say that....
Back on point....I'm hoping to read some real time use of these burrs, before springing for them....at 4 doubles a day, I've got another 3 years at least on my 1 year old burr set, I'd bet.

[terryz]

I'm getting ready to invade the Duranium camp located in SoCal, sector 19 of the lower california basin. The LBC leader Gallamites has confirmed the location of the sought after Duranium and has even claimed that these ae better than Unobtanium, so I have given in to this fact and will now submit to the powers greater than espressoparts.com........

Yeah, right. Stay tuned ordering some in various sizes from the president of Espresso Parts today.

[RapidCoffee]

OK, enough Star Trek jokes. I installed the new "duranium" burr set this evening and gave it a trial run.


Old and new Mazzer Super Jolly burrs.

Installation went without a hitch. Preliminary versions of the new burr set had problems with offsets on the screw holes, but these have been fixed. Replacing the upper burr is trivial. To replace the lower burr, wedge a screwdriver in the opening to keep the burr carrier from turning while you loosen (or tighten) the three screws.

Tightening the lower burr.

As Michael Teahan promised, the new burr set grinds considerably faster than the standard Mazzer Super Jolly burrs. How much faster? I did some testing, but with a caveat: my Mazzer SJ burrs are now three years old. I go through about a pound of coffee a week, so let's say 200 pounds on these burrs. This is still well within the rated usage recommendations (400kg or almost 900lb ).

At a slightly coarse setting, the old burr set ground 24.6g in 10 seconds. The new burr set ground 36.2g in 10 seconds. The grinder setting was adjusted to give comparable pours on my Vetrano. So in round numbers, the duranium burrs grind about 50% faster than the standard Mazzer burrs. I have no idea how much of this is due to new vs. old burrs, but there's a significant speed difference.

Longevity? I can't answer that. But if Michael Teahan's numbers are correct, this will be the last set of burrs that I'll ever install on my SJ.

Grinder stalling was reported with the preliminary duranium burr set. I have not observed this yet.
EDIT (Sat Feb 16): I'm sorry to report that Dan (as usual) was right about stalling issues. This morning my SJ stalled with the new duranium burrs; i.e., the burrs did not spin when I turned it on. After turning it off and back on, it ground as usual. Stay tuned...

How about taste? With only one grinder, that's a tough call. But I'm going to give this new burr set a thumbs up. On a home roast where I hit the sweet spot, I thought the new burr set gave a bit more fruitiness and definition of flavors than the old burr set.

Bottomless duranium pour.

First impressions (edited): For the relatively minor difference in price, the added speed and longevity make this new burr set look very attractive. Unfortunately, grinder stalling issues make it impossible for me to recommend the Duranium burrs.

[greatinfusions]

funny name... serious grindage.

i have already had some very positive feedback from my commercial accounts on these - reporting faster fluffier grinds and even a different sound.

available for rossi rr's as well... ooh aah.

[Jasonian]

Any more reports on cup quality?

Any close-up photographs of grind particle comparisons between the two?

I'm in the market, but I'm not convinced by initial hype.