JUNLONG Machinery Co., Ltd. — a world-class manufacturer of precision investment castings in carbon steel, alloy steel & stainless steel, serving automotive, rail, agricultural, and petroleum industries across 20+ countries.
JUNLONG Machinery Co., Ltd. was founded in 2014. Located in Weifang, Shandong, the company covers a total area of 60,000 square meters and has an annual production capacity of 20,000 tons of precision castings and machined finished parts. It specializes in materials such as carbon steel, alloy steel, and stainless steel.
With over 200 employees, including more than 30 engineering technicians, the company is a high-quality casting supplier integrating precision casting and deep processing. Leveraging strong engineering capabilities, a complete quality control system, and advanced management systems, JUNLONG has become a well-known brand manufacturer in the field of precision casting both domestically and internationally.
We are not just a casting supplier, but a one-stop precision manufacturing partner from concept to finished product. Through deep integration of advanced equipment, full-process quality control, and professional engineering support, we ensure high-quality, high-reliability casting solutions for our clients.
Equipped with internationally advanced automated casting production facilities and comprehensive physical and chemical analysis equipment, the company significantly enhances manufacturing efficiency and product quality stability while meeting comprehensive testing requirements for the mechanical properties of different materials.
Leveraging strong engineering capabilities, a complete quality control system, and advanced management systems, the company has become a well-known brand manufacturer in precision casting. Products are exported to Germany, the United States, Italy, Canada, and other countries.
A key supplier of high-tech precision castings for automotive, rail transportation, engineering machinery, material handling machinery, agricultural machinery, and petroleum machinery industries — serving global industry leaders and mid-to-high-end clients in Europe and America.
From initial design concepts to final product delivery, all key processes are completed in-house — mold manufacturing, precision casting, comprehensive machining (horizontal & vertical machining centers, CNC lathes, CNC milling machines, grinders), and surface treatment. This eliminates communication costs, quality risks, and delays associated with multi-factory collaboration, enabling full-process quality traceability with a single point of responsibility.
The company has obtained ISO 9001, TS 16949, UL, and other quality management system certifications, ensuring process control over every production detail and continuously pursuing product quality improvements to achieve high customer satisfaction.
Over 30 dedicated engineering technicians with deep expertise in materials science, casting process design, and quality control ensure every component meets exacting international standards for dimensional accuracy and mechanical performance.
The company is a high-quality casting supplier integrating precision casting and deep processing. Custom materials and complex geometries available for all industries.
Industrial carbon steel casting components made by lost wax investment casting. Strict dimension tolerance, excellent mechanical properties, available in multiple carbon steel grades.
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High-precision investment cast machinery parts with tight tolerance, smooth surface and stable mechanical performance. Custom materials & complex configurations available.
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Custom lost wax casting agricultural machinery components for farming equipment, harvesters and farm vehicles. Strict quality control, complex structural geometries supported.
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Precision casting of machinery parts with lost wax casting technology. High dimensional accuracy, smooth surface and stable mechanical performance for demanding applications.
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Pump valve accessories precision casting with high dimensional accuracy and smooth surface. Made of premium alloy steel and stainless steel, wear-resistant for industrial fluid systems.
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Alloy steel investment casting for forklift parts, high precision, strong toughness and wear resistance. Custom lost wax casting forklift components for material handling applications.
Learn More →The company also serves as a key supplier of high-tech precision castings for industries such as automotive, rail transportation, engineering machinery, material handling machinery, agricultural machinery, and petroleum machinery. We provide high-quality products, services, and solutions to global industry leaders and mid-to-high-end clients in Europe and America.
JUNLONG supplies precision investment castings for a wide range of agricultural equipment including harvesters, tractors, planting machines, and irrigation systems. Our castings deliver exceptional wear resistance and structural integrity to withstand the demanding conditions of modern farming operations, helping agricultural equipment manufacturers reduce maintenance cycles and improve field reliability.
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Our precision castings for the petroleum industry are engineered to endure extreme pressures, corrosive media, and high temperatures encountered in oil & gas extraction, refining, and pipeline infrastructure. We produce pump bodies, valve components, manifold blocks, and drill string accessories using premium alloy steel and stainless steel grades, fully compliant with international petroleum equipment standards.
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JUNLONG is a certified TS 16949 supplier to automotive OEMs and Tier-1 suppliers. We produce precision investment castings for engine components, transmission housings, steering knuckles, suspension brackets, and braking system parts. Our automated casting lines and rigorous dimensional inspection ensure every part meets the zero-defect quality expectations of the global automotive supply chain.
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Construction machinery such as excavators, loaders, and cranes relies on high-strength, wear-resistant castings to support heavy-duty operations. We provide customized precision casting services, producing structurally complex and high-load-bearing components to ensure machinery remains durable and efficient in harsh environments like mining, construction, and road construction.
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Marine environments demand the highest levels of corrosion resistance and structural reliability. JUNLONG supplies stainless steel and alloy steel precision castings for ship propulsion systems, deck hardware, valve assemblies, and structural connectors. Our castings undergo rigorous salt-spray testing and non-destructive evaluation to meet international marine classification standards.
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From decorative façade connectors to structural glass fittings, JUNLONG produces architectural hardware castings that combine aesthetic precision with structural performance. Our stainless steel investment castings deliver mirror-polished surfaces, complex geometric profiles, and long-term corrosion resistance for luxury construction projects worldwide.
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Safety-critical rail components demand absolute dimensional precision and metallurgical reliability. JUNLONG supplies precision castings for bogie frames, brake system components, coupler assemblies, and track fastening hardware to major rail vehicle manufacturers and infrastructure operators across Europe and Asia, fully compliant with EN and TB/T railway standards.
✉ Inquire NowWe are not just a casting supplier, but a one-stop precision manufacturing partner from concept to finished product. Through deep integration of advanced equipment, full-process quality control, and professional engineering support, we ensure high-quality, high-reliability casting solutions for our clients.
Core Advantages: Seamless connection, controllable quality, shorter lead times. From initial design concepts to final product delivery, all key processes are completed in-house.
Customer Value: Eliminates communication costs, quality risks, and delays associated with multi-factory collaboration, enabling full-process quality traceability with a single point of responsibility.
Ensures dimensional accuracy at the source of casting. All tooling is designed and produced in-house for maximum precision and repeatability.
Core process utilizing internationally advanced automated casting production facilities with comprehensive physical and chemical analysis capabilities.
Equipped with a comprehensive machining workshop including horizontal machining centers, vertical machining centers, CNC lathes, CNC milling machines, grinders, and specialized machine tools — providing full-process machining from rough blanks to precision components.
Meets final appearance and performance requirements including shot blasting, polishing, coating, and specialized surface finishing for corrosion protection.
Equipped with internationally advanced automated casting production facilities and comprehensive physical and chemical analysis equipment, JUNLONG significantly enhances manufacturing efficiency and product quality stability.
The company has obtained ISO 9001, TS 16949, UL, and other quality management system certifications, ensuring process control over every production detail and continuously pursuing and improving product quality to achieve high customer satisfaction.
Our quality management system covers the entire manufacturing lifecycle — from raw material incoming inspection and process monitoring to finished product dimensional verification and mechanical property testing — guaranteeing that every casting delivered meets or exceeds international standards.
A selection of our precision investment castings across multiple industries and material grades, demonstrating the breadth and depth of JUNLONG's manufacturing capabilities.
Over a decade of continuous growth, technological investment, and global market expansion — the numbers tell our story.
Leveraging strong engineering capabilities, a complete quality control system, and advanced management systems, the company has become a well-known brand manufacturer in the field of precision casting both domestically and internationally. Its products are exported to overseas markets including Germany, the United States, Italy, Canada, and other countries.
We provide high-quality products, services, and solutions to global industry leaders and mid-to-high-end clients in Europe and America. Our company will continue to strengthen research and development efforts for new products and technologies, integrate advanced management and technical resources, build a powerful brand, and strive to become a world-class precision casting supplier.
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Our company will continue to strengthen research and development efforts for new products and technologies, integrate advanced management and technical resources, build a powerful brand, and strive to become a world-class precision casting supplier! Partner with JUNLONG for reliable, high-quality precision castings delivered on time, every time.
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