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Thread: My pucks split horizontally - don't know why

  1. #1
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    My pucks split horizontally - don't know why

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    My pucks are splitting horizontally, the top half of the puck just falls out of the PF and the second half needs a gentle tap. Happens to most, but not all extractions. I am using a Breville Barista Express, using the in-built grinder. Roasting my own coffee on a Behmour (currently the Yemeni, but same issue on other beans). The ones that split are a little more acidic in flavour than those that aren't. I aim for an extraction of 25g from 18g of grounds. I have tried different tamping pressures, but can't control. Not sure if it is my tamping technique or theridge on the basket that is the cause. Any ideas or suggestions as to cause or impact. Could not find any info online.

  2. #2
    Senior Member GregWormald's Avatar
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    I'd be suspicious of any ridge in the basket--but first: do you tap the PF on the bench at least once or twice to settle the grounds before tamping?
    Dimal likes this.

  3. #3
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    No don't tap the PF, just gently shift the grounds around the outside, then tamp. Should I be tapping?

    I have seen tampers for the 54mm basket, maybe I should also see if I canb get an after-market basket for the Express.

  4. #4
    Senior Member level3ninja's Avatar
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    No don't tap. What you describe typically happens when coffee is underextracted, typically caused by over dosing, typically when someone can't get a grinder to go give enough and ups the dose to compensate. 18g sounds like a lot for a 54mm basket. Have you tried grinding finer and dosing less?

  5. #5
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    Thank you Ninja. Will try and reduce dose - and adjust grind lower to suit. Will make the last of my Yemeni last longer as well...

  6. #6
    Senior Member Jackster's Avatar
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    Are you going to do a 5c clearance test to determine your dose?

  7. #7
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    Behmor Brazen - $249 - Free Freight
    I had a similar thing happening to me with my Flair Espresso. I added some pre-infusion time and it went away.
    My assumption is that the grinds were at different levels of absorption when pressure was applied and hence packed together differently.
    Don't really know if that makes any sense.



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