Comandante C40 MK4
A premium stainless-steel hand grinder that ships with a glass catch jar - about as close to plastic-free as a high-end grinder gets, held back only by a plastic internal frame in the grind path.
The verdict: Minimal plastic contact
The body, crank, and axle are stainless steel, the burrs are Comandante's proprietary high-nitrogen martensitic stainless steel, and the knob is natural oak - the brand deliberately uses no aluminum. It ships with two jars: an amber glass bean/catch jar and a shatter-resistant clear polymer (BPA-free plastic) jar, so you can run the grounds path entirely in glass. The one unavoidable plastic is the "BPA-free plastic internal frame" inside the grinder that beans pass through on their way to the burrs; that keeps it from being a fully plastic-free grind path. Bearings use rubber seals, but those aren't in the food path.
What it's made of
| Part | Material | Food contact |
|---|---|---|
| body stainless steel (some models with wood veneer); no aluminum used; specific grade unspecified | Stainless Steel grade unspecified | No |
| burrs proprietary "Nitro Blade" high-nitrogen martensitic stainless steel, ~58 HRC; a specific proprietary alloy, not a standard 304/316 grade | Stainless Steel grade unspecified | Yes primary |
| internal frame (grind path) BPA-free plastic internal frame beans pass through; the one plastic in the contact path | Plastic other / unspecified | Yes primary |
| bean jar amber glass jar; clear glass jars also available separately | Soda-Lime Glass | Yes primary |
| catch jar (alternate) shatter-resistant clear BPA-free polymer jar; optional - a glass jar is included and can be used instead | Plastic other / unspecified | Yes primary |
| knob 100% natural oak, hand-made | Wood | No |
| bearing seals rubber seals on the stainless micro ball bearings; not in the food path | EPDM Rubber | No |
Comandante's flagship hand grinder, hand-assembled in Germany's Black Forest. The stainless-steel body and high-nitrogen "Nitro Blade" steel burrs are widely considered a benchmark for grind quality in a manual grinder. You crank beans loaded through the top down into a screw-on jar; it ships with two ~40g jars so you can grind directly into one while storing beans in the other.
Pros
- All-stainless body and burrs; no aluminum by design
- Ships with a glass catch jar, so the grounds path can be glass + steel
- Oak wood knob; premium build and excellent grind quality
- Steel burrs are extremely durable and rebuildable
Cons
- Internal frame beans pass through is plastic - not a fully metal/glass grind path
- Expensive
Notes
- Extra glass jars are sold individually and in 4-packs
- Older MK3 glass jars, crank, and pommel are backwards-compatible with the MK4
Common questions
Does the Comandante C40 MK4 have plastic in it?
Yes. On the Comandante C40 MK4, the internal frame (grind path) and catch jar (alternate) are plastic and sit in the food path. The rest of what touches your food is stainless steel and Soda-Lime glass. There is plastic in the bearing seals, which never touch your food.
What is the Comandante C40 MK4 made of?
Part by part, the Comandante C40 MK4 is: body — stainless steel; burrs — stainless steel; internal frame (grind path) — plastic; bean jar — Soda-Lime glass; catch jar (alternate) — plastic; knob — wood; bearing seals — EPDM rubber.
Where is the Comandante C40 MK4 made?
The Comandante C40 MK4 is made in Germany.
Categories: Hand Grinders
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://comandantegrinder.com/pages/faq brand states no aluminum used; ships one glass and one polymer bean jar; 100% natural wood knob; extra glass jars available
- review https://prima-coffee.com/equipment/comandante/c40-mk4-coman-pp retailer spec sheet - stainless steel body, high-nitrogen martensitic steel burrs, oak knob, "BPA-free plastic internal frame", rubber-sealed steel bearings, amber glass and clear polymer jars
- review https://www.amazon.com/Comandante-4260113435663-Nitro-Blade-Black/dp/B07JQ4P976 listing confirms MK4 ships with one brown glass jar and one clear polymer (shatter-resistant) catch jar
Independent reviews
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