There have been a number of posts here and at CG regarding using Super Jolly burrs in a Mazzer Mini (http://www.coffeegeek.com/forums/espresso/machines/135689
and Grind quality of Mazzer Mini E vs. Super Jolly?
). It appears that the Mini motor has enough power to drive the larger SJ burr set for low duty cycle home use, so I decided to do a burr swap on my standard Mini. It is not too difficult if one has access to a lathe to fabricate adapters for fitting the 64mm burrs to the existing carriers. I understand that Mini-E burr carriers also fit and could be used without modification.
The modification seems to work great. I have not noticed any motor stalling or overheating in the home use environment. I also like the SJ performance in a Mini package and cost.
Here are the details:
Machine two centering rings (2.175 OD, 2.047 ID, 0.075 thick) that press into the SJ burrs to center them on the Mini carriers. The rings need to be filed slightly for clearance at the mounting holes. The photo shows the standard burrs above the SJ burrs with the centering rings installed.
Drill new mounting holes in the lower burr carrier. Use a turned drill guide and the SJ burr to locate the holes.
Drill new mounting holes in the upper burr carrier.
Tap the new mounting holes for the burr mounting screws.
Mount the SJ burr to the upper burr carrier.
Mount the SJ burr to the lower burr carrier and install on the motor shaft.