DeLonghi Dedica KG521.M Grinder : How to modify for finer grind. 

In order to install the washer, you do not need to disassemble the grinder. After removing the upper millstone, the lower millstone is unscrewed from the shaft clockwise. In order not to scratch the millstone, place a rag on it and turn it clockwise with pliers. This grinder has a coarse grinding step. Therefore, it will not become an espresso grinder.

Thanks so much

That's just what I need. Thank you for sharing this！

Thanks a lot for your video. I've just managed to successfully tweak my grinder - let's see tomorrow morning how the grind result will look like. Just some learnings: 1. as suggested from someone else to get access to the washers from the top: I was not able as the upper millstone was tightened too strong (but now after dis- & reassembling it's a great shortcut to do further tweaking) 2. Washer: inner diameter of 10mm is important, but the outer diameter of 15mm is not as important (I think you could also install 20-25mm easily) 3. to remove the power button I needed to cut off the 2 barbs of it (but don't worry about it). otherwise you don't get access to the screw underneath. 4. at 4:46min it's hard to see, but you need to push the "plate" down to screw the nut on the threaded rod 5. at 5:48min: start with the front and don't pinch this sealing thingy from the buttons module. really take care that the buttons are properly working (mechanical feedback). double-check or you need to reopen everything later (like I did). have fun tuning your grinder!!

so you only changed one washer into a thicker one? I thought there were two washers in that place, will it be better if I change them both?

Thanks, I did this. Few notes: - After this, seems all settings above 5, the top part of grinder is shaky. I did not try grinding with it since it seemed scary, and i only need espresso. - I dont know if I fucked up, but seems after this I cannot use the portafilter mode,,,,, I will try and hack container mode, but it is not as easy to start stop in that - The grind setting of 4 gives me incredible grinding, works well with bottomless portafilter + EC685 (Previously setting 1 was watery!) I got 10pc washers of 1mm, 1.5mm & 2 mm. I ended up using 1.5mm + One of the old (seems 0.5mm?) for total 2mm, seems good on first try.

Great video, this. This modification will make the grinder suitable for non-pressurized filters?

After modification, you are still using a pressurized filter basket. will this change the grind enough to use a bottomless filter basket? can you send a link to where i can get the cup you are using?

Здравствуйте, а какой все таки из способов лучше для модификации?? У вас просто два видео на канале. И хотелось бы знать какой эффективнее и безопаснее??

All of a sudden my Delonghi grinder grinds a really rough batch of coffee, even on the finest setting. It's only a few months old Any idea what could cause this?

Hi, are you adding another washer (together two washers) there or changing the existing one for a new thicker? Thank you

Hi, nice video!! Can you do another video with unpresured portafilter I want see if is good extraction 😉😉😉

Hey Mate, where did you find a dose cup that suits the 51mm portafilter?? Cheers.

Thanks for the tips. When you say thickness is 1.5mm, you mean for the new or the old one ?

Additionally, could you please make a video showing how to replace the milk frother?

So you have experiment with different thickness and found the optimum is 1.5mm thickness ? How about 2mm? Great video btw, have been looking for this for 2 years ! I also have EC685 and KG521 like you, modified the steam wand, but the grind is too course for non pressurized.

When removing the grinder axle, be very careful moving the motor unit, mine dislocated 6 springs 6 steel balls and a washer so I had to open the compartment and fix it...

How to open the top cover? I find it so difficult.

Use 2 washer or 1 washer?

My Motor burned, that was too much. I did this optimization from 1mm to 1.5mm. And after straight 10 cubs the engine went even slower and warmer. So setting 3 with 1.5mm copper washer is to close and too hard work for the engine. So LOOK OUT!

can I add 2 washers at the same time to obtain a finer grind ?

Hello, what is the outer diameter? where to buy it?

mine is block now 😢 i have no idea why 😕

Sadly I have not managed to get the grind fine enough and have sent the item back for a refund. The search continues.

Keep interrupting 👍🏼❤️.

How to remove power button

Before Shot looks better than the After mod. shot.

J'ai pas compris la vidéo ????? Pourquoi une rondelles de 1.5mm???

Just don’t do this. Try to sell it. If you want Espresso you will have no fun … even with this hack. The results are far from execrable. I know good results do have their costs … but for espresso 100 bucks on top to get a real one.

In order to install the washer, you do not need to disassemble the grinder. After removing the upper millstone, the lower millstone is unscrewed from the shaft clockwise. In order not to scratch the millstone, place a rag on it and turn it clockwise with pliers. This grinder has a coarse grinding step. Therefore, it will not become an espresso grinder.