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Glen Pitt-Pladdy :: Blog

Coffee Hack: De'Longhi ESAM4200 Beans to Cup Grinder Mod

In an effort to rationalise my coffee setup I did a load of research and eventually settled on the De'Longhi ESAM4200 as a practical compromise from a huge amount of very messy Barista gear. I've found that I've had to run both the grind and strength controls at their extremes to get a decent cup and it's not quite measured up.

Time for a hack

The thing that's bothered me all along has been the grind - it's very course. The finest setting is a tiny bit finer than I would expect for a Cafetière, but a long way short of Espresso.

I've been wondering if I could tweak it to get finer grind and this is what I discovered...


What this describes will certainly invalidate your warranty, likely damage your machine and may even have other effects (I'd imagine metal or other debris in the grounds and burning out the motor as likely possibilities), not to mention other safety and health risks.

Understand what we're doing here fully before attempting it and do this entirely at your own risk.


First of all, ensure that the machine is completely disconnected from power. This is important since electrics will be exposed during this.

Then we need to get access to grinder. This is done by removing the screws on the back and sliding the side panel back and off.

ESAM4200 side panel screws

This will expose the grinder and the adjustment mechanism.

ESAM4200 Grinder Mechanism

We need to get a bit of extra space to work with here. For this the 3 screws below the beans hopper (silver heads in the photo above) will need to be removed. You could disassemble more but I've found I get enough flexibility in the plastic with only these screws removed.

It may also help to remove the adjustment knob in the hopper - for this pry out the plastic plug in the top and then unscrew it. It only fits on one way. The extra movement in the gear will help give you a little bit of extra space to work.

Then you will need to pry the small adjustment gear up (I used a flat screwdriver) and turn it by a tooth or two towards the course end without moving the larger gear on the grinder. This effectively shifts the adjustment to think that the current position is courser than before and so you can turn it down even finer.

ESAM4200 Grinder Hack

Now, obviously some care is needed here. Making this excessively fine will likely see the grinder burs hitting each other, potentially putting excessive load on the motor, and probably a whole lot more. After this some special care is needed to ensure that nothing is going to break.


Reassemble everything, checking carefully that electrics is all good and nothing is missing before reconnecting power.

I would recommend leaving the adjustment as-is initially, and then press the button to brew and while the grinder runs gradually reduce the grind size paying attention to any strange noises or any other signs of problems.

Coffee is now much richer and closer to what I would expect from decent quality Espresso machine, and in fact I'm backing off the grind control since depending on the beans, the finest setting results in the pull taking way too long.


GFS Image  2018-07-10 12:51 :: GFS

Just wanted to say a thank you for this.  I have the same machine and have been disappointed by the insufficiently fine grind.  Ironically, I had another identical machine before, for a couple of weeks, until I noticed that it was leaking at the back and had it replaced with the current one.  This first one had a much finer grind and I was disappointed to loose that.  I’ve been living with it for way too long (and wasting coffee) and was researching new machines, when I found your article.

FWIW, I had to remove some more screws to get sufficient ‘play’ to be able to rotate the settings cog independently of the grinder cog.  I moved it 4 clicks  and I actually think I could have gone another 1 or 2.  I’ll give it some time to see how I like it.

Thanks again!


Tomas Image  2020-12-20 14:29 :: Tomas

hi, thank you for an excellent hint / mod. How does it work for you in the longer run? Is everything ok? thanks

Glen Pitt-Pladdy Image  2020-12-20 18:43 :: Glen Pitt-Pladdy

I've sold the machine and moved back to a manual "barista style" machine again, but until I did that it seemed to work fine with a small caveat. If you are using very fresh beans (as I do) then some types are very prone to blocking when the grind is too fine. This mod of course makes this possible so you can end up with a shot being blocked, and if bad enough that can make a bit of a mess when it tries to discard the puck.

Otherwise I had no other problems. Beware though, that different machines and beans might not behave the same so you need to decide for yourself what your appetite for risk is and accept that things might not turn out as good for you.

Tomas Image  2020-12-22 08:47 :: Tomas

thanks, I have just tried it :) all works ok, tried two different beans, one fresh needed different settings but I'm starting from the biggest grain to softest, works perfectly :) thanks

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