Specs
| Burrs | Stock 74 mm flats. Mythos-size burrs might fit, but The Coffee Chronicler hasn't tried them 15:24 |
| Dial | It ships set coarse. Lift off the magnetic dial to recalibrate to the chirp. Even one mark moves a shot noticeably 15:24 |
Starting settings
These are the settings each creator gave, measured from their own grinder's zero. Use them as a starting point.
| Method | Setting | Context | Confidence | By | Source |
|---|---|---|---|---|---|
| Espresso | around 2, at 900 to 1000 rpm | On The Coffee Chronicler's own chirp calibration. 1000 rpm tasted balanced, 900 a little clinical and 800 soft and mild | approx | Chronicler | 12:51 |
| Pour-over | from the coarsest setting down to about 89, at 800 rpm | On The Coffee Chronicler's own zero calibration. The exact figure is uncertain | unclear | Chronicler | 13:22 |
Cup profile
- Filter is acid-forward with space between the notes, a light smooth body and moderate sweetness. It's closer to SSP brew burrs than to Timemore's turbo burrs. Espresso at 1000 rpm is modern, clear and detailed with body, like SSP high-uniformity 64 mm burrs 15:24.
Strengths
- Very quiet, with 0.1 to 0.3 g retention, close to zero with a lid trick. It grinds 18 g in 6 to 9 s with an auger feed. Four screws give you burr access, and the cup is magnetic 15:24.
Weaknesses
- The auto-reverse barely clears the grounds and there's no knocker. The plasma generator is so-so, the beeps can't be turned off and the plastic chute gets static. There are few 74 mm burr options 15:24.
Verdict
In 2025 The Coffee Chronicler called it a mid-range Niche killer, with better flavour out of the box than a Timemore 064S or 078S 15:24.
Sources
- The Coffee Chronicler: I've Tested 50+ Grinders. This One Changed How I Think (2025-07-04)
Summarised in our own words from the creators' videos, with every point linked to the moment it comes from. Notchbook isn't affiliated with or endorsed by any of these creators, so please watch the originals for full context. Sources
Dialling in from here
- Sour, thin or fast? Grind finer. Why coffee tastes sour
- Bitter, dry or slow? Grind coarser. Why coffee tastes bitter
- Espresso: how to dial in. Filter: pour-over grind size.
Compare with other grinders in the grind size chart, or see every grinder.
Notchbook is a free app that remembers the setting that worked on your MHW-3Bomber F74 Navigator for each coffee and brew method, and keeps a journal of every brew. Get it free on Google Play. The iPhone app is coming soon. More about Notchbook.