The40T/D Fully Automatic Atta Chakki Plant is a compact yet high-capacity industrial milling solution purpose-built for the production of traditionalAtta (whole wheat flour) — the staple flour used across South Asia for making chapati, roti, naan, and other flatbreads. Unlike refined white flour milling, Atta production requires a unique stone-grinding (chakki) approach that preserves the natural bran, germ, and endosperm together, delivering flour with superior nutritional profile, characteristic brownish color, and optimal water absorption for dough elasticity. Designed as afully automatic turnkey plant with a daily capacity of 40 tons, this system is ideal for medium-to-large commercial flour mills, chakki brand manufacturers, and export-oriented wheat processing facilities in India, Pakistan, Bangladesh, the Middle East, and Africa. The entire line — from wheat intake and cleaning to stone milling, sifting, and automated packaging — is governed by a single PLC system, ensuring consistent Atta quality with minimal operator intervention.
Atta Chakki Plant Working Principle
The 40T/D Atta Chakki Plant operates on thetraditional stone-grinding principle upgraded with modern automation. Whole wheat kernels are thoroughly cleaned and conditioned to an optimal moisture level of 14.5–16%, which softens the bran layer and prevents it from shattering during grinding. The tempered wheat then enters theEmery Stone Chakki Mill, where the slow rotation of a stationary lower stone and a rotating upper stone gently crushes the entire kernel — including bran, germ, and endosperm — into a homogeneous whole wheat flour. This single-pass stone grinding generates less heat than steel roller mills (keeping flour temperature below 45°C), thereby preserving natural enzymes, vitamins, and gluten strength. The ground material is then sifted to separate a small portion of coarse bran (adjustable based on customer preference) and cooled in a flour conditioner before packaging. The entire sequence is managed by a PLC that automatically adjusts feed rate, stone gap, moisture addition, and sifting parameters.
Wheat Flour Complete Workflow:
Wheat Intake & Storage → Pre-Cleaning (Vibratory Separator + Destoner + Magnet) → Scourer & Aspiration → Tempering & Conditioning (Automated Dampener + Tempering Bins) → Emery Stone Chakki Milling → Plansifter Grading → Flour Cooling & Conditioning → Automatic Weighing & Packaging (Valve Bag Packer → Sewing Machine → Conveyor)
1. （Wheat Cleaning Section）
A multi-stage cleaning train consisting of a vibratory separator, destoner, magnetic separator, disc scourer, and aspiration channel removes all foreign impurities — stones, metal, dust, weed seeds, and broken grains — achieving a cleaning efficiency of over 99.5%. This protects the emery stones from premature wear and ensures the final Atta is free from contaminants, meeting food safety standards.
2. （Automated Dampener & Tempering System）
The PLC-controlled dampener precisely sprays water onto the cleaned wheat to reach the target moisture level of 14.5–16%, followed by a retention time of 12–24 hours in tempering bins. Proper tempering softens the bran layer, reduces energy consumption during grinding by up to 20%, and improves the final Atta’s water absorption capacity — a critical quality parameter for roti-making.
3. （Emery Stone Chakki Mill）
The heart of the plant — vertical emery stone mills with a 40-inch or 48-inch stone diameter. The lower stone remains stationary while the upper stone rotates at 250–320 RPM, creating a gentle shearing and crushing action that grinds the whole wheat kernel in a single pass. The stone surface is dressed with spiral grooves engineered specifically for Atta production, ensuring uniform particle size distribution (80–90% passing through a 60-mesh sieve) while keeping the flour temperature below 45°C to preserve natural taste and nutrition.
4. （Plansifter & Grading Section）
A multi-tier plansifter with graded mesh screens separates the ground material into fine Atta flour and coarse bran overs. Depending on the customer’s market requirement, the extraction rate can be adjusted from 85% (coarser Atta with visible bran) to 95% (finer, more refined Atta). The bran overs can be re-ground or sold separately as animal feed, adding an extra revenue stream.
5. （Flour Cooler & Conditioner）
Freshly milled Atta contains residual heat and moisture. A counterflow cooling conveyor reduces the flour temperature to ambient levels, preventing moisture condensation in packaging bags, extending shelf life, and improving the flour’s flowability during packing.
6. （Automatic Weighing & Packaging Line）
The final station includes a high-precision electronic scale (accuracy ±0.1%), a valve-type bag packer (1 kg, 5 kg, 10 kg, 25 kg, or 50 kg options), an automatic bag top sewing machine, and a roller conveyor. The system handles 4–6 bags per minute and integrates with the PLC for production counting, batch tracking, and daily throughput reporting.
Wheat Flour Mill Plant Features
Modern Upgrade of Traditional Stone Milling Process – Employing natural diamond grinding discs and the ancient chakki low-speed grinding principle, while equipped with a PLC fully automatic control system, achieving a combination of traditional taste and modern efficiency.
All Stainless Steel Material Contact Components – From cleaning to packaging, all pipes, hoppers, and sieves that come into contact with wheat and flour are made of 304 stainless steel, meeting ISO 22000 food safety system requirements.
Intelligent Moisture Control and Conditioning System – An automatic watering machine calculates the amount of water added in real time based on the initial moisture content of the wheat, working in conjunction with a temperature-controlled conditioning chamber to ensure uniform conditioning of each batch of wheat and consistent flour quality.
Low-Temperature Grinding Technology – The temperature rise during the stone mill grinding process is controlled below 45°C, far lower than that of steel roller mills (60–75°C), effectively preserving B vitamins, vitamin E, and natural enzyme activity in the wheat germ.
Fully Automatic Atta Chakki Plant Advantages
High flour yield of 92–95% – Whole wheat milling technology retains almost all bran and germ in the flour, resulting in a 15–20 percentage point higher yield compared to refined white flour production lines, leading the industry in raw material utilization.
Finished flour water absorption of 65–70% – Low-temperature stone milling process protects the proportion of damaged starch (8–12%), making the dough more water-holding, resulting in better extensibility and less hardening when making roti/chapati.
Energy consumption per ton of flour reduced by approximately 18% – Single-pass milling (no need for multiple milling stages), coupled with a variable frequency motor drive, controls unit energy consumption to 55–65 kWh/t, significantly saving energy compared to traditional multi-pass milling processes.
Changeover time shortened to within 30 minutes – One-click switching of formula parameters (grind fineness, sieve mesh size, packaging weight) via PLC enables rapid production transitions to meet different market demands.
Benefits
Turnkey delivery, ready to use – We handle everything from factory layout design and steel structure platform installation to equipment commissioning and operator training. Customers can start production in as little as 45 days, quickly capturing local Atta market share.
Multi-purpose, covering multiple flour types – The same equipment can produce Atta whole wheat flour, Maida all-purpose flour, Rava coarse wheat flour, and Suuji baking flour by changing the sieve and adjusting the grinding gap, helping customers flexibly respond to market fluctuations.
Remote after-sales service and spare parts support – We offer a 12-month warranty + a 5-year spare parts supply commitment + a remote diagnostic system (supporting TeamViewer real-time connection). Core consumable parts such as diamond grinding discs can be shipped globally within 72 hours.
Conclusion
The40T/D Fully Automatic Atta Chakki Plant represents the ideal convergence of traditional stone-grinding craftsmanship and modern industrial automation. By preserving the natural goodness of whole wheat — including bran, germ, and all essential nutrients — while delivering a consistent, high-volume output of 40 tons per day, this turnkey solution empowers mill owners to produce premium-quality Atta at scale with minimal labor and maximum energy efficiency. Backed by proven installations across South Asia and Africa, third-party quality certifications, and a comprehensive after-sales support network, this plant is not just an equipment purchase — it is a strategic investment in your flour brand’s future.
📩 Ready to start your Atta milling journey or upgrade your existing plant? Leave us a message online with your daily capacity requirement and target flour specifications. Our engineering team will provide a customized plant layout, turnkey quotation, and technical proposal within 24 hours. Your premium Atta brand starts here — message us today!