| Business demand and capacity | Estimate maize intake and finished-product demand per day, including seasonal peaks. | Compare the machine’s rated throughput in kg/h with the hours available for production. Treat advertised capacity as an estimate because maize variety, moisture, screen size, and product specification affect output. | A suitable capacity helps avoid both production bottlenecks and unnecessary investment in equipment that is too large. |
| Product type and fineness | Decide whether you will make whole-maize meal, sifted meal, grits, or flour, and specify the required particle size. | Ask for a demonstration using your target product specification. Check available screens, adjustment options, and whether separate grinding or sifting stages are needed. | The product specification determines the milling configuration, processing time, and market suitability. |
| Cleaning and grain preparation | Check how the line removes stones, dust, husks, and other foreign material before milling. | For commercial production, assess the need for a cleaner, sieve, destoner, and aspiration system alongside the mill. Prepare grain according to the equipment supplier’s moisture and cleanliness requirements. | Effective preparation supports consistent flour quality and reduces contamination and avoidable wear on processing equipment. |
| Power supply and energy use | Confirm motor rating, voltage, phase, frequency, starting current, and expected energy use. | Match the machine to the site’s electrical supply. Request the motor nameplate details and energy-consumption information for the intended operating conditions. | A mismatch can require electrical upgrades or backup power and may increase operating costs. |
| Product quality and yield | Review flour consistency, separation performance, and the amount of saleable product produced from incoming grain. | Request a trial with representative maize and agree on how output, screenings, and by-products will be measured. Results vary with grain condition and the chosen product. | Actual saleable output is more useful for business planning than throughput alone. |
| Installation space and workflow | Measure the footprint and consider grain receiving, storage, operator access, bagging, and product movement. | Allow room for safe maintenance and cleaning, and check floor, ventilation, dust-control, and material-handling requirements before installation. | A practical layout can improve workflow and reduce handling time, dust exposure, and safety risks. |
| Maintenance and spare parts | Identify wear parts, service intervals, cleaning procedures, and local availability of replacements. | Ask for a parts list, maintenance schedule, warranty terms, and training requirements before purchase. | Accessible parts and straightforward servicing can reduce downtime and help control long-term costs. |
| Total cost of ownership | Consider purchase price, installation, power, labor, maintenance, packaging, and transport. | Compare options using estimated cost per tonne of saleable product, not purchase price alone. Base calculations on realistic operating hours and local costs. | A whole-life cost comparison gives a clearer view of affordability and potential business returns. |