Do all burr grinders statically-electrically–charge the grinds, or do only the faster-operating ones do this?

Krups GVX212 burr grinders are notorious for producing statically-charged grinds that stick to the plastic hopper:

Do all electric burr grinders produce statically-charged grinds, or does it depend upon the grind speed* or other factors?

*The Krups GVX212 does 20g in ~30 seconds.

1 Answer 1


Yes, "Different grinders, coffees, and environments may produce more or less static" ("Reducing Static in your Grinder").

According to "Stop Coffee Grinder Static with RDT," "you'll get more static during the drier months or with darker roasted and therefore drier beans".

The "Ross Droplet Technique (RDT)" was pioneered in 2005. Basically, you stir the beans in or spray them with a small amount of water, immediately before grinding. The water reduces static but does not clog the grinder.

Coffee grinds are insulators. There are several methods of discharging insulators (Assis, Experimental and Historical Foundations of Electricity vol. 1, §7.14 "How to Discharge an Electrified Insulator?"):

  1. Wait. The insulator will discharge over time. (ibid. Experiment 7.29)

  2. Submerse the insulator in water. (ibid. Experiment 7.30)

  3. Hold a flame near the insulator. (ibid. Experiment 7.31, first discovered by the physicist William Gilbert, 1544-1603)

  • when i had a grinder like this, i glued an aluminium strip inside wrapped to the outside and touched it to discharge static.
    – ths
    Feb 1, 2022 at 0:04
  • @ths That discharged all the grains?
    – Geremia
    Feb 1, 2022 at 1:50
  • it helped quite a lot. of course the grinds need to be in contact with the strip to work.
    – ths
    Feb 1, 2022 at 13:06
  • @ths I tried that, and it didn't reduce the static, even for the grains in direct contact with the aluminum foil.
    – Geremia
    Feb 10, 2022 at 17:38

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