1Zpresso J-Max
A CNC metal-bodied manual espresso grinder whose only bean-contact plastic is a removable hopper lid.
The verdict: Minimal plastic contact
The body is stainless steel and aluminum alloy, the burrs are 48mm titanium-coated stainless steel, and the magnetic catch cup is anodized aluminum - so the grind chamber and the grounds path are metal. The one piece of plastic that touches beans is the PC (polycarbonate) lid that caps the hopper; it is removable and only briefly contacts beans as you load them. A leather grip, wooden knob, and silicone/rubber anti-slip base round it out (none in the food path). Very close to plastic-free, held back only by that hopper lid.
Verification: Manufacturer confirmed · Last reviewed
What it's made of
| Part | Material | Food contact |
|---|---|---|
| body stainless steel and aluminum alloy CNC construction; grade unspecified by manufacturer | Stainless Steel grade unspecified | No |
| burrs 48mm titanium-coated stainless steel conical burrs; grade unspecified by manufacturer | Stainless Steel grade unspecified | Yes primary |
| hopper lid PC (polycarbonate) lid caps the hopper; removable, the only bean-contact plastic | Plastic other / unspecified | Yes primary |
| catch cup magnetic anodized-aluminum cup; grounds collect here | Hard-Anodized Aluminum | Yes primary |
| catch cup base silicone anti-slip base on the cup; not in the food path | Silicone | No |
| knob wooden ball on the crank handle | Wood | No |
| grip leather grip on the body | Leather | No |
| anti-slip band | Silicone | No |
A precision manual grinder aimed at espresso, with 1Zpresso's hallmark external numbered grind adjustment on a CNC-machined metal body. You grind into the magnetic catch cup, which detaches to dose straight into a portafilter. A leather grip and wooden crank knob finish the build. Sold as J-Max and J-Max S.
Pros
- Titanium-coated stainless steel burrs; excellent espresso-capable grind
- Precise, repeatable numbered grind adjustment
Cons
- Anodized-aluminum catch cup rather than steel or glass
- Premium price for a manual grinder
Notes
- Sister models (JX-Pro, J-Ultra, JE-Plus) share the metal-body, aluminum-catch-cup, PC-lid pattern
Categories: Hand Grinders
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://1zpresso.coffee/product/jmax-spareparts/ official spare-parts list names a "PC lid", "Magnetic catch-cup", wooden ball, leather grip, anti-slip rubber
- review https://www.coffeeness.de/en/1zpresso-j-max-review/ body is stainless steel and aluminum alloy; 48mm titanium-coated stainless burrs; magnetic catch cup with silicone base
- review https://craftcoffeespot.com/grinder/1zpresso-j-max-review/ describes the catch cup as metal (anodized aluminum) and the overall build as wood/PC/silicone/stainless/aluminum
Independent reviews
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.