For pour-over coffee grinders require specific burr characteristics to achieve optimal extraction. Here are the key requirements
1. Precision & Uniformity
• Critical Need: Consistent particle size distribution minimizes fines/boulders.
• Why: Fines cause over-extraction (bitterness), boulders under-extract (sourness).
• Solution: High-tolerance flat burrs (e.g., 40-64mm) or precision conical burrs (e.g., Mazzer, FFDBURR 59.5mm/64mm 3 layer tooths ).
2. Adjustability
• Fine Control: Micro-adjustments within the medium-fine to medium-coarse range (500-800 microns).
• Why: Pour-over demands exact grind size tuning for flow rate/clarity.
3. Low Heat & Static
• Burr Material: Stainless Steel 420 or Titanium coated Stainless steel burrs reduce heat transfer.
• Why: Heat degrades volatile aromatics; static causes clumping.
4. Geometry Design
• Flat Burrs:Preferred for uniform particles and clarity (e.g., EK43 98mm , Ode FFDBURR specialized single origin 64mm )
• Conical Burrs: Can work well if high-precision (e.g., C40, K-Ultra).
• Avoid: Ghost Blade/entry-level burrs with high inconsistency.
5. Fines Management
• Low Fines Output: less-than 10% fines ( less-than 100μm) for clean cups.
• Why:Excessive fines clog filters and muddy flavors.
6. Burr Size & RPM
• Larger Burrs (≥64mm ): Stabilize grind distribution at low RPMs.
• Low RPM:Minimizes heat/fracture (ideal: 300-500 RPM).
Key Recommendations:
• Electric Grinders: Wilfa Uniform, EK43.
• Hand Grinders: Comandante C40, 1ZPresso K-Ultra
• Avoid: Low-grade conical burrs or aggressive espresso-focused designs.
Why it matters: Pour-over’s manual extraction amplifies grind inconsistencies. Precision burrs ensure even water flow, highlighting delicate notes (floral/fruity) in light roasts while avoiding astringency or flatness.
More questions about our Burr Set how to comply with your machines , feel free to get in touch with us , we are always here ~
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