About this product
FeaturePortable,Durable,Adjustable Speed
Quantity Per Pack1
AssemblyFully Assembled
Product description
**Seven Star Hand Coffee Grinder Refill**
1.- Material: 304 stainless steel (meets FDA food contact standards)
- Design concept: seven stars composite grinding structure + double bearing system
- Applicable scenes: hand brewing / French press / mocha pot and other medium-fine to coarse grinding
- Core patent: 7-star spiral layered grinding disk technology
2. **Precision adjustment system**
- 7-speed adjustable dial (each adjustable pitch 0.15mm)
- Non-slip threaded adjustment ring (with tactile positioning click)
3. **Transmission system**
- Double bearing support structure (upper ball bearing + lower plane bearing)### 4. Comparison of advantages
Comparison between ** and traditional 4-star grinding core **
- 62% lower residual powder rate (
- Grinding uniformity increased by 40% (particle size standard deviation ≤ 150μm)
- 3 times longer service life (test standard: 50 tons of coffee beans)
- Hygienic: the whole machine can be disassembled and washed without dead ends
1. **Grinding Adjustment Guide
1 speed: espresso (very fine)
3 speeds: hand brewed coffee (medium fine)
5 speeds: French Press (medium coarse)
7 speeds: Cold Brew Specialty (Coarse)