tldr; The gold standard hand grinder. Redditors say the grind quality rivals electric grinders costing 3x more.
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Best praise vs top criticism for Comandante C40 MK4 Nitro Blade Grinder
“I have to add that I just brewed my best cup to date with this coffee using my ceramic V60, Comandante C40 MK4 and Stagg EKG kettle. Such a tasty and delicate cup with all the taste notes as described on the bag by the roaster. Amazing stuff!”
“I have a C40 mk4. Not quite the ZP6, but I also have a DF64 on Labsweet SSP burrs. The difference between my C40 and the DF is there. but honestly, I’ve done some blind tests and it’s not something I can say is superrrrr pronounced. I would expect that the difference between the ZP6 and the C40 will also likely be noticeable but it’s not going to be life changing. Not until u get to the bigger flat burr sets / endgame grinders. I do not regret having a conical and a flat burr setup, and if you have the budget- go for it. Why not? It’s fun! Don’t expect a life changing difference, there are a lot of other factors at play. I think at this range of quality it’s noticeable but not super pronounced.”
218 Reddit opinions analyzed • Last updated 2/24/2026