Executive Summary
Australia’s sheep flock reached 79.1 million head in June 2024 — the largest since 2007 — supporting record lamb production of 629,682 tonnes carcass weight. In this high-volume environment, feedlot operators face relentless pressure to optimize feed conversion efficiency while managing input costs. Pelleted lamb feed, which improves feed conversion ratios and daily weight gain compared to mash or textured rations, has become standard practice in Australian commercial lamb finishing systems.
This case study examines how a commercial lamb feedlot in New South Wales evaluated and adopted Hongyang (Liyang Hongyang Feed Machinery Co., Ltd.) ring dies for their existing pellet mill, achieving measurable improvements in pellet durability, throughput stability, and die service life while reducing per-tonne feed production costs.
Australia Sheep and Lamb Industry Context
According to Meat and Livestock Australia’s Fast Facts 2025 publication, the Australian sheep industry generated $9.1 billion in turnover during the 2023–24 fiscal year. The national flock stood at 79.1 million head as of June 2024, comprising 48.9 million breeding ewes and 27.5 million lambs — a 0.4% year-on-year increase that confirms sustained herd rebuilding. In 2024, total sheepmeat production reached 927,230 tonnes carcass weight, a 9.5% increase from the previous year (Australian Bureau of Statistics, 2024).
The industry’s scale is matched by its global competitiveness. Australia exported more sheepmeat in 2024 than any country in any single year on record, with lamb exports reaching nearly 360,000 tonnes — 21 percent above the five-year average. Key markets include the United States, China, and the Middle East, with the latter emerging as Australia’s largest regional destination, taking 27 percent of lamb export volumes.
Within this ecosystem, commercial lamb feedlots play a critical finishing role. Lambs destined for premium export and domestic markets are typically backgrounded on pasture before entering feedlots for a 30 to 60 day finishing period on high-energy pelleted rations. Pellet quality — specifically the Pellet Durability Index (PDI) — directly affects feed intake consistency, bunk wastage, and ultimately, carcass specification compliance against target weight and fat score windows.
Australia also hosts world-class ruminant feed manufacturing infrastructure. Milne Feeds in Western Australia operates the country’s largest ruminant feed mill with an annual capacity of 300,000 tonnes, producing products including LambGro pellets that serve sheep and lamb producers nationwide. This industrial scale reflects the central role of pelleted feed in Australian lamb production systems and the premium placed on consistent pellet quality.
Customer Background and Challenge
The customer is a privately owned lamb feedlot operator in the Riverina region of New South Wales, finishing approximately 45,000 lambs annually for domestic and export markets. The operation includes a 25,000-head feedlot capacity with a dedicated on-site feed mill producing roughly 120 tonnes of pelleted lamb finisher ration per week on a single pellet mill running 12 to 14 hours daily, six days per week.
The mill had been using ring dies sourced from a North American OEM. While performance was generally acceptable, three issues had become increasingly pressing over an 18-month period:
Rising Procurement Costs: OEM ring die pricing had increased by approximately 22 percent over three years, driven by exchange rate movements and supplier pricing policy. For a single-mill operation operating on tight margins, this trajectory was unsustainable.
Delivery Uncertainty: Lead times fluctuated between 8 and 14 weeks depending on the supplier’s production backlog. Stocking multiple spare dies was capital-intensive; running with only one spare introduced unacceptable production risk.
Inconsistent Die Performance: The operator had experienced two instances of premature die wear — one involving abnormal wear patterns after approximately 1,200 operating hours, well short of the expected 2,000 to 2,200 hour service life. Root cause analysis by the OEM was inconclusive.
The feedlot manager summarized the situation: “When you are running one mill, die reliability is not just a cost issue — it is a business continuity issue. A sudden die change disrupts our entire feeding schedule and puts finishing program targets at risk.”
In early 2025, the operator began evaluating alternative ring die suppliers. Hongyang was identified through an industry contact in Southeast Asia who had successfully transitioned multiple pellet mills to Hongyang ring dies for ruminant and poultry feed applications.
Hongyang Ring Die Solution
Hongyang’s technical team conducted a detailed review of the customer’s feed formulation (barley-wheat-lupin base, 14 percent crude protein, 12.5 MJ/kg ME target), production parameters, and pellet mill specifications before recommending a tailored ring die configuration:
Parameter: Pellet Mill Model. Specification: CPM 7730.
Parameter: Ring Die Inner Diameter. Specification: 762 mm.
Parameter: Effective Width. Specification: 203 mm.
Parameter: Hole Diameter. Specification: Φ4.5 mm.
Parameter: Effective Thickness. Specification: 68 mm.
Parameter: Compression Ratio. Specification: 1:8.0.
Parameter: Material. Specification: Vacuum-degassed alloy steel (X46Cr13 equivalent).
Parameter: Heat Treatment. Specification: Vacuum furnace hardening + double tempering.
Key technical attributes of the Hongyang approach included:
Material Integrity and Traceability: The ring die was manufactured from vacuum-degassed alloy steel billet, selected for its low inclusion content and uniform microstructure. Mill test certificates confirmed chemical composition and mechanical properties traceable to the heat number — a metallurgical foundation critical for maintaining consistent hole geometry and wear characteristics under sustained high-throughput lamb feedlot production.
Precision Drilling and Bore Finish: Die holes were drilled using German-origin gun drills on CNC multi-spindle drilling centers, achieving consistent bore surface finish from entry to exit in a single pass. Tight diameter tolerance control across the die face ensures uniform pellet formation and minimizes the incidence of cracked or irregular pellets that contribute to fines generation.
Vacuum Heat Treatment with Double Tempering: The die underwent hardening in a vacuum furnace followed by a controlled double-tempering cycle, delivering uniform hardness distribution with minimal surface decarburization. This process — standard across Hongyang’s ring die production since the company commenced die manufacturing in 2006 — addresses one of the most common failure modes in feedlot ring die applications: localized soft spots leading to accelerated and uneven wear.
Application-Specific Compression Ratio: The 1:8.0 compression ratio was selected specifically for the customer’s barley-wheat-lupin formulation, balancing the need for adequate pellet compression against the risk of excessive die friction that could reduce throughput and increase energy consumption. Hongyang’s technical team provided the compression ratio rationale with supporting calculations, giving the mill operator confidence in the specification before ordering.
Results and Customer Feedback
The first Hongyang ring die was installed in mid-2025 on the feedlot’s CPM 7730 mill, running the standard lamb finisher ration. Performance data was tracked over a 120-day evaluation period against the previous OEM die baseline:
Metric: Pellet Durability Index (PDI). Previous Supplier: 93.2%. Hongyang Ring Die: 94.5%. Change: +1.3 percentage points.
Metric: Throughput Rate (t/h). Previous Supplier: 6.8. Hongyang Ring Die: 7.0. Change: +2.9%.
Metric: Fines Return Rate. Previous Supplier: 7.5%. Hongyang Ring Die: 5.8%. Change: –22.7%.
Metric: Die Start-Up Waste. Previous Supplier: 15–20 min flush-in. Hongyang Ring Die: Under 5 min. Change: Material saving.
Metric: Die Service Life (estimated). Previous Supplier: 1,800–2,200 h. Hongyang Ring Die: 2,100–2,500 h. Change: Improved range.
Metric: Procurement Cost. Previous Supplier: Baseline. Hongyang Ring Die: Approximately 18% lower. Change: –18%.
The PDI improvement from 93.2 to 94.5 percent, while modest in absolute percentage terms, had meaningful downstream effects. In a lamb feedlot context, every percentage point of pellet integrity translates to reduced fines in feed bunks, more consistent intake across pens, and less feed sorting behavior — all contributing to the uniform growth rates critical for hitting market specification windows on schedule.
The reduction in die start-up waste was particularly valued by the mill operator. The ability to produce saleable pellets within minutes of die installation — rather than the 15 to 20 minute flush-in period required by the previous die — saved an estimated 3 to 4 tonnes of feed per die change. Across multiple die changes annually, this represented meaningful cost recovery.
After seven months of operation with Hongyang ring dies, the feedlot manager offered the following assessment:
“We approached a Chinese ring die supplier with a healthy degree of skepticism. Our previous experience with aftermarket dies had been mixed. But Hongyang’s technical engagement was different — they asked the right questions about our ration, our target pellet hardness, and our operating schedule. The die delivered consistent PDI from day one, and throughput has been reliably steady. Perhaps most telling: we ordered a second die for our spare inventory within three months of the first installation.”
The procurement lead added:
“Lead time has been consistently four to five weeks compared to the 10 to 14 week range we were dealing with previously. For a single-mill operation, that predictability changes how we manage inventory and maintenance scheduling. When we needed technical guidance on adjusting compression ratio for a trial barley-heavy winter ration, Hongyang’s engineering team responded within 24 hours with a detailed recommendation. That level of support makes a real difference to our planning.”
Conclusion
The Australian lamb feedlot sector operates at significant scale, with demanding quality and efficiency requirements driven by both discerning domestic consumers and fiercely competitive export markets. In this environment, ring die performance — measured through PDI, throughput stability, service life, and total cost of ownership — has a direct impact on feedlot profitability and finishing program predictability.
This case study demonstrates that Hongyang’s ring dies can deliver pellet quality and production reliability that meet or exceed the standards of established Western suppliers, while offering meaningful advantages in procurement cost and lead time predictability. For Australian lamb feedlot operators who depend on single-mill production continuity, the combination of consistent pellet durability, responsive technical support, and predictable supply represents a compelling operational proposition.
Liyang Hongyang Feed Machinery Co., Ltd. has specialized in ring die and roller shell manufacturing since 2006. The company supplies products compatible with all major pellet mill brands, including CPM, Andritz, Buehler, Van Aarsen, Famsun, and Muyang. Its products are exported to over 30 countries and are supported by ISO-certified quality management systems.
Post time: Jun-08-2026
