Feed is the largest single cost on a poultry or pig farm, and grinding is where part of that money quietly disappears. A mill that is fed slightly damp maize, or that runs a 1.5 mm screen on a 3 kW motor, does not stop working. It grinds slowly, heats the meal, blinds the screen and sends flour into the air instead of into the bag. The farmer blames the machine. The real cause is usually a mismatch between three numbers: screen aperture, hammer clearance and motor size.
We build the 30-20 to 50-36 hammer mill range in six steps, from a 3 kW unit that puts through 400 kg/h to a 22 kW unit rated at 2000 kg/h. The frame layout is the same across the range. A balanced rotor carries reversible hardened hammers, the screen wraps the full width of the grinding chamber and is held by two bolts, and the discharge can be a plain chute or a blower feeding a cyclone. That last option matters more than it looks: with a cyclone, meal goes into a bin or a mixer hopper instead of a pile on the floor, and the dust that normally hangs in the shed goes with it.
Output is set by the screen before it is set by the motor. A 2 mm screen on dry maize gives fine meal for chicks and a lower hourly rate; a 6 mm screen gives coarse grits and roughly a third more throughput on the same motor. Nothing else on the machine changes. Buyers who plan to grind both maize and soybean meal usually take two screens and swap them at the two bolts.
The second setting is hammer clearance. New hammers sit close to the screen and grind fast; as the corners round off, clearance opens, the material circulates longer and output falls while the motor works harder. Reversing the hammers doubles their life, and a set normally lasts a full season on maize.
Moisture is the third factor, and it is the one farmers control least. Above about 14 percent, maize smears rather than shatters, the screen blinds and the mill heats up. Drying to 13 percent before grinding is worth more than any motor upgrade.
The range is used for maize, sorghum, millet, soybean meal, cassava chips and dry fodder, and it sits upstream of a mixer or a pellet mill in most of the small feed plants we ship. Zhengzhou Weiwei Machinery has been building farm and feed machinery in Henan since 1980, with CE and ISO9001 certification, and we size a mill against your grain, your moisture and your daily bag count rather than against a catalogue. Send your capacity target and grain type through the website and we will come back with the model and the screen.
If you need any assistance, you can contact our company via WhatsApp at +86 13526462915 to obtain the quotation.
