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Thread: Breville Barista Express - Constant under extraction

  1. #1
    Junior Member
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    Feb 2020
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    Lightbulb Breville Barista Express - Constant under extraction

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hey! I have recently started making my own coffee, did a barista course to learn the basics and got breville barista express thinking that Iíll help me extract a decent shot of espresso. Unfortunately thatís not what happened.

    Beans: I use fresh, locally roasted beans (Jessieís Cafe, WA).
    Grinder settings: 1... first I tried with ď5Ē, but the extraction lasted 10 seconds, was watery and overall not good. Went lower but results were the same so I settled on ď1Ē and itís still not good.
    Dose: As advised by breville I put 18 grams in (double shot, non pressurised basket)
    Tamping: I practice tamping pressure on a scale (the one for humans ), I try to put 15-20kg of pressure while tamping.
    Extraction: 16-18 seconds to get 1:2 ratio so I guess itís too fast

    Anyone has any idea what I might be doing wrong? Is the grinder setting wrong, is my too week etc.??

    Thank you for all the help! Hope I explained everything, if not just ask me about more info )

  2. #2
    Senior Member
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    Apr 2017
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    See page 19 of manual, Adjusting Conical Burrs. One adjustment at a time, re-assemble.

    The number for the grind size wheel of 1 indicates to me that you need to extend grinder range by adjusting the conical burrs.
    GOOD LUCK
    Andy, Dimal, Javaphile and 1 others like this.

  3. #3
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    That is a good machine to get into coffee properly, with fresh beans (as long as the beans are within 3 weeks of the roasting date they should be OK) you should be able to choke the machine with the built-in grinder. Breville actually have pretty good support so I would give them a ring.

    It is fairly common with the Breville standalone grinders to install shim kits (I put some in a BCG 800), which are just washers which push the 2 part conical burr blades closer together. I am not sure if the shims work in the BES 870, but you could carefully follow the instructions and remove and re-seat your burrs and see if that makes a difference.

    You could also just return it to the retailer and ask for an exchange.
    Dimal likes this.

  4. #4
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    Or what WarrenK say above as that sounds much easier!

  5. #5
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    Quote Originally Posted by WarrenK View Post
    See page 19 of manual, Adjusting Conical Burrs. One adjustment at a time, re-assemble.

    The number for the grind size wheel of 1 indicates to me that you need to extend grinder range by adjusting the conical burrs.
    GOOD LUCK
    Thank you so much! I had no idea itís adjustable from the inside!

    Changed it and now itís perfect!

    thank you ))
    Dimal and Javaphile like this.

  6. #6
    Senior Member level3ninja's Avatar
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    It's a pretty nifty design. Leave it set out of the box for stale supermarket beans in a pressurised basket, but adjustable to choke the unpressurised basket with just about any beans. Also means the same manufacturing tolerances produce fewer duds.
    Dimal likes this.



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