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Breville Barista Express - Constant under extraction

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  • Breville Barista Express - Constant under extraction

    Hey! I have recently started making my own coffee, did a barista course to learn the basics and got breville barista express thinking that I’ll help me extract a decent shot of espresso. Unfortunately that’s not what happened.

    Beans: I use fresh, locally roasted beans (Jessie’s Cafe, WA).
    Grinder settings: 1... first I tried with “5”, but the extraction lasted 10 seconds, was watery and overall not good. Went lower but results were the same so I settled on “1” and it’s 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 it’s 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
    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

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    • #3
      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.

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

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        • #5
          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 it’s adjustable from the inside!

          Changed it and now it’s perfect!

          thank you ))

          Comment


          • #6
            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.

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