This guide explains how to select the correct grinder structure based on material hardness.
1. For Soft Materials (Low Hardness & Easy to Break)
Examples:
Flour ingredients, grains, sugar, salt, brittle herbs
Recommended Structure: Pin Mill / Disc Mill
A pin mill uses high-speed shear and impact to process soft materials efficiently.
Benefits:
Stable particle size
Wide material compatibility
Low heat generation
Easy maintenance
Best For: Small factories, food shops, spice processors.
2. For Medium-Hard Materials (Typical Spices & Dried Roots)
Examples:
Black pepper, cumin, coffee beans, dried chili, dried ginger, turmeric
Recommended Structure: Hammer Mill
With strong impact force, the hammer mill is ideal for medium-hard spices and fibrous materials.
Benefits:
High grinding efficiency
Adjustable fineness through screens
Suitable for fibrous or aromatic spices
Best For: Spice factories, food processing plants.
3. For Hard Materials (High Hardness or Mineral-Type Particles)
Examples:
Hard Chinese herbs, mineral additives, hard cereals
Recommended Structure: Turbo Mill / Cooling-Type Fine Grinder
A turbo mill uses high-speed vortex impact to achieve fine grinding even for hard materials.
For ultra-fine powder (80–300 mesh), a cooling system or cryogenic grinding is recommended.
Benefits:
Fine and ultra-fine output
Less heat generation
Suitable for long-term processing of hard materials
4. For Oily, Sticky, or Fibrous Materials
Examples:
Sesame, peanuts, oily seeds, fresh ginger, garlic
Recommended Structure: Low-Speed Crusher / Pulping-Type Grinder
High-speed structures cause clogging with oily materials.
Low-speed or pulping-type grinders prevent sticking and preserve aroma.
Benefits:
No clogging
Stable output
Suitable for fresh or high-oil materials
5. Practical Selection Advice
Identify hardness, oil content, and fiber level of the material.
Match hardness with structure:
Soft → Pin mill
Medium-hard → Hammer mill
Hard → Turbo mill
Oily → Low-speed grinder
Select model based on required capacity (50–500 kg/h).
Add features such as dust collection, cooling, or water circulation if needed.
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