Stone Mill Machine

Traditional Grinding Precision for Whole Grains, Pulses, and Natural Flour Production

Engineered for the Future | Since 2080

The ADDAMS Stone Mill brings time-honored milling craftsmanship into the modern era. Designed for low-speed, cold grinding, it gently processes whole grains, seeds, pulses, and spices into high-quality, nutrient-rich flours. This natural stone grinding technology preserves flavor, aroma, and nutritional content, making it the preferred solution for clean-label and artisanal food production.

Ideal for organic flour milling, natural ingredient processing, and traditional food production lines, the ADDAMS Stone Mill ensures an authentic grinding experience with modern reliability and consistency. By avoiding the high-heat friction typical of steel rollers, our stone mills keep the “heart” of the grain—the germ and bran—intact and biologically active.

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Technical Specifications and Machine Architecture

Official Engineering Data and Technical Documentation

The ADDAMS Stone Mill is constructed with high-density, long-life composite stones that provide a consistent milling surface. The machine features precise gap control to switch between coarse meals and ultra-fine pastry flours.

Feature	Detailed Technical Specification
Millstone Diameter	Industrial range from 400 mm to 1500 mm
Capacity Range	From 20 kg/h (specialty) up to 2,500 kg/h (industrial)
Milling Technology	Low-RPM cold grinding for maximum nutrient retention
Drive Technology	High-torque electric motors ranging from 2.2 kW to 30 kW
Construction Material	Mild Steel, Stainless Steel cladding, or Stone-only housing
Fineness Adjustment	Manual or automated stone gap control
Operational Sound	Quiet, low-vibration engineering for factory environments
Multi-Functionality	Suitable for milling, hulling, and splitting operations

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Operating Principle: Cold Stone Grinding

Preservation of Nutrient Density and Flavor

The Stone Mill operates on a simple yet effective principle where grain is fed between a stationary bottom stone and a rotating top stone.

1. Grain Intake: Raw material is fed into the center of the stones. Gravity and centrifugal force move the grain outward toward the grinding grooves (furrows).

2. Cold Grinding: The stones rotate at a low RPM, generating minimal heat. This prevents the oxidation of delicate oils and preserves vitamins and enzymes.

3. Shearing and Crushing: The unique pattern carved into the stones shears the grain rather than smashing it, resulting in a superior flour texture that retains all parts of the whole grain.

4. Discharge: The ground flour is discharged from the periphery of the stones into the collection chute, ready for sifting or packaging.

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Industries We Serve with the ADDAMS Stone Mill

Innovative Processing Solutions from Seed to Industry

ADDAMS delivers turnkey plants and modular machinery that transform natural raw materials into high-value outputs across a wide range of global sectors.

• Food & Beverage Processing: Producing hygienic whole-grain flours, spices, and pulse-based ingredients for human consumption.

• Health & Nutrition: Processing superfoods like Moringa, Chia, and Turmeric into nutrient-dense powders.

• Pharmaceuticals: GMP-compliant grinding for herbal active compound preservation (Ginger, Chamomile, Fennel).

• Cosmetics: Fine grinding of botanicals and seeds for high-purity oils and natural exfoliants.

• Animal Feed Processing: Converting Legumes and Grains into balanced, digestible feed.

• Bioenergy Plants: Efficient pre-treatment of biomass and seeds for renewable energy extraction.

• Seed Processing: Certified equipment for sowing seed preparation and conditioning.

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Processed Crop Groups with ADDAMS Stone Mill

Comprehensive Utility for Artisan and Industrial Milling

Crop Group	Industry Uses & Applications
Grain Crops	Wheat, Spelt, Rye, Maize, Rice, Sorghum: Flour, cereals, and gluten-free mixes.
Pulse & Legumes	Chickpeas, Lentils, Peas, Beans: Hummus flour, plant-based proteins, and splitting.
Oilseed Crops	Soybean, Sunflower, Sesame, Flax: Defatted flours, protein meals, and biodiesel prep.
Nut Crops	Almond, Hazelnut, Walnut, Pistachio: Confectionery pastes and nut flours.
Spices & Herbs	Turmeric, Cumin, Coriander, Pepper: Seasonings and medicinal powders.
Industrial Crops	Moringa, Castor, Jatropha: Supplements, lubricants, and bioenergy.
Fibre Crops	Hemp, Flax: Industrial fibers and omega-rich nutritional products.

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Strategic Advantages and Key Features

• Nutrient Preservation: Low-temperature milling ensures that heat-sensitive vitamins and healthy fats remain in the final product.

• Authentic Texture: Produces a unique, slightly granular flour texture that is highly prized by artisan bakers and premium food brands.

• Multi-Crop Versatility: One machine can handle everything from hard maize to delicate spices with a simple adjustment of the stone gap.

• Industrial Durability: Our high-density composite stones are designed for years of continuous use before requiring dressing.

• Hygienic Design: Available with stainless steel cladding and food-grade lubricants to meet the strictest international safety standards.

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Frequently Asked Questions – Stone Mill

Why is stone-milled flour considered better than roller-milled flour?

Stone milling is a cold process. Modern roller mills often generate significant heat that can “burn” the flour, damaging enzymes and vitamins. Stone milling preserves the natural state of the grain, including the essential oils.

Can this machine be used for splitting lentils?

Yes. By adjusting the gap between the stones to be slightly larger than the seed diameter, the ADDAMS Stone Mill is exceptionally effective for hulling and splitting red lentils, yellow peas, and fava beans.

How often do the stones need to be maintained?

The composite stones used by ADDAMS are extremely hard-wearing. Maintenance (stone dressing) is typically only required after hundreds of tons of processing, depending on the abrasiveness of the crop.

Is the machine suitable for gluten-free products?

Absolutely. We offer stainless steel housing options that are easy to sanitize between batches, making it an ideal choice for facilities processing gluten-free ancient grains like Buckwheat, Quinoa, and Millet.