EK43 Burr Alignment – Experience with the Titus Tool and the Perger Method

As the burrs on our EK grinder started to break in with use, it became apparent that their alignment was pretty far off. EK espressos were flowing too quickly and extraction was far less than optimal; under-extraction was exacerbated by updosing to stretch contact time. We had tried the Perger technique (dry erase marker on the flat portion of the burr, aluminum shims, attempting to align both the fixed and the moving burrs sequentially) without as much success as hoped. So, on the recommendation of a friend, I purchased a Titus EK alignment kit, which has helped immensely - our EK shots are ground well off the “zero” point, have slowed down substantially and extraction is now running at about 22%. And they are tasting great.

Some quick tips from my experience (and a caveat, I’m far from an expert here! I’m just hoping to help you save a bit of time when you go for it!):

  • I have the V1 kit, without the thumbscrew in the mounting bracket (the additional thumbscrew helps adjust both mounting bracket height and ease of removal). With the v1 kit, you need a rubber mallet to basically hammer the mounting bracket onto the shaft.  Be sure not to hammer it all the way down as it’ll be realllly hard to remove!
  • The real trick to using the Titus kit is getting the deflection gauge probe in the right position, at the edge of the flat portion of the burr, just brushing the top surface of the ridges.
  • If you zero the gauge properly at the top of one of the ridges, you’ll quickly find the high point on the burrs as your carefully rotate it 360.  
  • The technique that worked for me was marking the high point, then bringing two other points, around 120 degrees apart, to the same level via the shims (you might need different thickness shims in these spots to get to the high point).  Ie, basically building a tripod so that the burr is brought to the highest level of distortion in the frame.  The Titus kit comes with shims in 0.01mm increments, which takes a lot of the guess work out of the levelling process.
  • Matt Perger’s Barista Hustle video on EK alignment is a must-see before attempting to align the EK burrs, even with the Titus kit!  He points out so many crucial aspects of alignment, such as ensuring you are shimming the outer rim of the burrs (the only part that makes contact with frame.)
  • You also need to review the Barista Hustle video because the Titus tool only helps with the fixed burr (I’m sure there is some super clever person out there who has figured out how to mount it onto the rotating burr...I’m clueless).  So once you’ve levelled the fixed burr, you need to use the Perger dry erase marker technique to find the high points on the rotating outer burr.  Again, I used the tripod shim technique (ie shims in two places around what I thought to be the high point) and that seemed to work well.

Best of luck - and if you can finish this project in less than two hours, my proverbial hat is off to you!

- Aaron

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This Post Has 2 Comments

  1. Once it was all shimmed up, was your stationary burr zero all the way around or was there still slight variation on the deflection gauge? I’ve had luck getting within +/- .01mm variance all the way around but have had a tough time getting to zero.

    1. Hey Aaron! I’m sure I was lucky, but I ended up with a very minimal and consistent offset reading as the gauge traveled around the burr. Speaking to friends, +/- .01mm seems to be a great outcome, and really hard to improve upon given that the thinnest shims in the set are .01mm, though I guess it would be possible to find some special foils.

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