# J-Max vs C40 MK4 Nitro Blade: specs and price compared

A sourced, side-by-side comparison of the J-Max (1Zpresso) and C40 MK4 Nitro Blade (Comandante) among coffee grinders. J-Max is the cheaper of the two at $199.

## Side by side

| Spec | J-Max | C40 MK4 Nitro Blade |
| --- | --- | --- |
| US price | $199 | $325 |
| Brand | 1Zpresso | Comandante |
| Released | — | 2021 |
| Type | manual | manual |
| Burr type | conical | conical |
| Burr size (mm) | 48 | 39 |
| Grind settings | 90 clicks per rotation (8.8 µm/click), external dial | ~40 clicks per rotation |
| Hopper capacity (g) | 40 | 40 |
| Best for | espresso | all |
| Weight (lb) | 1.7 | 1.63 |

## Key differences

- Burr size (mm): J-Max 48 vs C40 MK4 Nitro Blade 39
- Grind settings: J-Max 90 clicks per rotation (8.8 µm/click), external dial vs C40 MK4 Nitro Blade ~40 clicks per rotation
- Best for: J-Max espresso vs C40 MK4 Nitro Blade all
- Weight (lb): J-Max 1.7 vs C40 MK4 Nitro Blade 1.63

## What reviewers say

**C40 MK4 Nitro Blade** — Only one whitelisted hands-on reviewer survived verification: Tom's Guide, which lab-measured grind uniformity (Kruve sieves), retention (scale, before/after) and grind speed, and named the Comandante C40 MK4 Editor's Choice. Every quote and measured value in this entry was confirmed verbatim against the fetched article. Verdict: best-in-class hand grinder for consistency and low retention, but slow to crank at fine settings and very expensive. (1 sourced review.)

## Sources

- J-Max: https://1zpresso.coffee/j/ (1zpresso.coffee, verified 2026-06-19)
- C40 MK4 Nitro Blade: https://prima-coffee.com/equipment/comandante/c40-mk4-coman-pp (prima-coffee.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/coffee-grinders/1zpresso-j-max-vs-comandante-c40-mk4/
Cite: Per The Front Desk Review, J-Max ($199) vs C40 MK4 Nitro Blade ($325) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/coffee-grinders/1zpresso-j-max-vs-comandante-c40-mk4/
License: CC BY 4.0.