Grass Crusher Machine

The 9FB60×100 is rated at approximately 2.5–3.0 t/h, so I would not select it as a comfortable 3 t/h design point without checking the material first. If your plant must continuously supply 3 t/h, screen size, alfalfa moisture, prepared length and operating margin should be evaluated before confirming the model.

For 6 mm grass pellets, a screen in the several-millimeter range is normally a more practical starting point than automatically grinding everything through 2 mm. The final choice depends on stem structure, formulation and pellet mill requirements; unnecessarily fine grinding increases power consumption and can reduce crushing capacity.

No. A 4 mm screen is a passage-control component, not a guarantee that every particle will measure exactly 4 mm. Fibrous material produces a distribution of particle sizes because leaves, stems and tougher fibers break differently during hammer grinding.

The 9FB series covers a stated processing range of approximately 0.5–20 mm, but 0.5 mm represents fine grinding rather than the normal target for every forage application. Before specifying that duty, we would confirm how much material must actually reach the fine fraction and whether the added grinding load is commercially justified.

Material in this condition may be suitable if it feeds continuously without bridging, but feedability must be checked against its bulk density, stem stiffness and moisture. Very long, tangled forage should be pre-cut first; whole dense bales should go through bale breaking rather than directly into the 9FB.

No. Dense 400–500 kg bales should be opened before fine grinding. A typical arrangement is bale breaking → controlled conveying → grass crushing, with additional cutting only where the opened fibers remain too long for stable feeding.

Yes, provided its actual discharge condition is suitable for the crusher and the two machines are capacity-matched. We would check the opened fiber length, discharge rate, conveyor dimensions and surge behavior rather than simply connecting a nominal 5 t/h bale breaker to a 5–6 t/h crusher.

Around 12–15% moisture is a practical condition for many dry alfalfa grinding duties. At approximately 18%, fine-screen grinding can become noticeably more difficult, with lower throughput and a greater tendency for material to accumulate around the screen. If 18% is common rather than occasional, the system should be selected around that condition. Comparable forage-hammer-mill references also rate alfalfa below roughly 15–18% moisture.

No, not for normal fine grinding. Fresh Napier grass is generally too wet and too long to treat like dry hay. It normally needs cutting first and, where the intended product requires dry fine-ground material, drying before the grass crusher.

Usually not if your final product is conventional wet silage. A 9FB grass crusher is intended for further size reduction of suitably prepared material; high-moisture fermented silage is a different processing duty. If you intend to dry the whole-plant corn for meal or pellets, then a fine-grinding stage can be evaluated after moisture reduction.

No. Remove stones and as much soil contamination as practical before fine grinding, and use magnetic separation where tramp metal is possible. Soil accelerates wear; stones and metal create a much more serious risk of damage to the grinding components.

Not necessarily. Moving from an 8 mm to a 4 mm screen increases the amount of size reduction required before material can leave the chamber, so some capacity loss is normal. Before increasing motor power, check moisture, feed length, hammer wear, screen condition, feeding stability and discharge airflow.

Start with the required hourly duty rather than annual tonnage alone. At 8,000 t/year, a plant operating 2,000 hours annually needs about 4 t/h average net output; one running 4,000 hours needs about 2 t/h. That difference can move the project into a completely different 9FB model range.

Do not plan a 2-to-4 t/h expansion around motor replacement alone. Across the 9FB range, chamber width and overall grinding capacity also change. If 4 t/h is a confirmed second-stage target, it is better to size the machine and surrounding conveyors with that expansion in mind from the beginning.

Yes. One 9FB can process properly prepared alfalfa and ryegrass, but do not assume identical tonnes per hour. Their stem structure, leaf fraction, bulk density and feeding behavior differ, so model selection should cover the more demanding operating condition.

Not necessarily. The forage-grinding duty and grain-grinding duty are different, and an existing grain mill may be better retained for grain. For a 10 t/h formula containing 60% alfalfa, for example, the theoretical alfalfa requirement is 6 t/h before allowing for operating margin and production scheduling.

Probably not. If 30–50 mm chopped forage is the finished requirement, a forage cutter or chaff cutter is generally closer to the job. The 9FB becomes relevant when you need further size reduction for forage meal, formulated feed, pellet production or similar processing.

Because the feeding duty is different. Grain is dense and free-flowing; opened alfalfa is light, bulky and fibrous. A mill that performs well on grain can suffer unstable feeding or bridging when long, low-density forage is introduced without the correct upstream preparation and feeding arrangement.

Check material moisture and incoming fiber length first, then inspect screen condition, hammer wear, feeding rate and discharge. If the blockage appears only after changing to a finer screen, the grinding duty or evacuation rate may be exceeding what the current configuration can sustain.

Yes. Soil and mineral contamination can substantially accelerate abrasive wear on hammers and screens. Instead of promising a fixed wear life, we would first reduce contamination upstream and then monitor hammer edges, screen openings, power draw and declining throughput to establish a maintenance interval for your material.

Yes, if one model can cover the required throughput at both grinding specifications. Interchangeable screens allow different production runs, but the machine should be sized against the finer, more demanding duty rather than only the easier product.

For this type of pellet production, a several-millimeter grind is a practical starting point, rather than leaving long forage fibers or automatically reducing everything below 1 mm. The exact screen should be finalized around pellet diameter, alfalfa stem condition, formulation and pellet-mill behavior.

No. At a continuous 4 t/h feed rate and 35% grass inclusion, the theoretical grass demand is only 1.4 t/h. You then add a reasonable margin based on batch scheduling and operating hours instead of automatically buying a 4 t/h grass crusher.

Yes, in some layouts. If sufficient vertical clearance is available, gravity transfer can simplify the system. Send the floor-to-floor height, crusher discharge elevation, mixer inlet elevation and equipment footprint so we can check whether direct discharge is practical or a conveyor is required.

Send the existing grinder dimensions, motor power, screen size, actual t/h, incoming forage length and moisture, discharge height, conveyor dimensions and available L × W × H. Also tell us why it is being replaced—capacity, blockage, wear or particle size—so the new machine solves the actual bottleneck.

For dry, finely ground alfalfa, dust collection should normally be considered. A properly designed arrangement may use enclosed transfer, cyclone separation, aspiration and filtration depending on the plant. The objective is not “zero dust,” but controlled material collection and reduced airborne fines around the grinding section.

As a practical global reference, an industrial grass crusher machine typically costs about USD 5,000–30,000 for the crusher itself, while a complete grass-crushing section can cost substantially more. The final price is mainly affected by model and motor power, feeding arrangement, screens, conveyors, bale/pre-cutting equipment, dust collection, electrical specification and automation.

Yes. The motor and electrical configuration can be specified for the confirmed project power supply. Send voltage, frequency, phase and installation country before manufacturing; do not assume that equipment configured for another market can simply be connected without checking the motor and controls.

Start by comparing the actual material condition rather than only the grass name. Send photos or video, moisture, average and maximum length, whether it is baled or loose, required particle size and hourly capacity. For an unfamiliar or unusually difficult forage, representative-material testing can be discussed before final configuration.

For whole bales, the front end normally begins with bale opening and controlled conveying, followed by additional cutting where the opened fibers remain too long. Drying is added when the incoming moisture is above the condition required for stable grinding and downstream pellet production. The 9FB is then selected around the prepared material actually reaching it.