if your grinder was purchased new and you are a domestic user it is unlikely the grinding plates would need replacing any time soon due to low volume use.
Yes the plates can be replaced if you wish, order from your retailer or Cunil agent.
You made reference to "measuring"...if you are talking measuring the plates for wear I dont know anyone that does that and you would need to have a new set of plates to measure for comparison, and then someone would need to be able to tell you what measurement constitutes a "worn" condition.
Generally, you would replace because you know a certain number of kilos have been put through (say 400 ish) or, because you can tell from the delivered grinds / the way they behave in brewing / the quality of the brew.....that they have had it.
If your coffees are good, thats all you need to know.....dont fix it if it aint broke!
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