Explore our foundational range of custom precision casting and machinery parts exported globally.
As the world transitions rapidly toward renewable energy, utility-scale photovoltaic (PV) and concentrated solar power (CSP) systems require structural components that can withstand extreme environmental challenges. As a professional OEM solar energy casting supplier, we recognize that structural reliability determines a project's 25-to-30-year lifecycle ROI.
Today's global solar tracker manufacturers face unprecedented requirements for precision, corrosion resistance, and material endurance. High-wind locations, desert environments with extreme thermal cycling, and coastal installations with high salinity necessitate advanced metallurgical formulations. Our custom castings for solar brackets, torque tube couplers, and drive joints are engineered to address these complex conditions, providing a foundation that stabilizes clean energy infrastructure globally.
Precision-engineered structural castings enable tracking mechanisms to tilt bifacial panels accurately, optimizing energy capture by up to 25%. Our custom lost-wax processes yield products that provide:
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. We leverage automated precision casting facilities and comprehensive physical and chemical analysis equipment to significantly enhance manufacturing efficiency and product quality stability.
Our comprehensive, in-house capabilities deliver design-to-delivery support that reduces supply chain friction.
Using CAD/CAM modeling, we build tooling that establishes high precision at the beginning of the casting process. Advanced tooling ensures structural longevity and eliminates defects before production begins.
Equipped with automated shell-making lines and temp-controlled drying chambers, we produce consistent castings in carbon steel, alloy steel, and stainless steel, with dimensional accuracy that reduces final machining times.
Our machining workshop features horizontal and vertical machining centers, CNC lathes, and milling machines. We machine rough blanks into ready-to-assemble critical components in one facility.
We provide various surface finishes, including hot-dip galvanizing (HDG), electroplating, and specialized coatings, ensuring parts withstand harsh weather, UV exposure, and moisture.
Core Advantages: Seamless connection, controllable quality, shorter lead times.
From initial design concepts to final product delivery, all key processes are completed in-house. This comprehensive integration eliminates communication costs, quality risks, and delays associated with multi-factory collaboration, enabling full-process quality traceability with a single point of responsibility.
We deploy modern testing equipment to maintain control over material chemistry and component dimensions.
Performs real-time chemical composition analysis before pouring, ensuring exact element ratios for carbon, stainless, and alloy steel specifications.
Measures yield strength, tensile strength, and elongation limits, verifying that our solar castings can withstand severe mechanical loading.
Evaluates toughness under low temperatures, simulating cold climates to ensure solar castings resist brittle fracture in winter regions.
Verifies dimensional geometry using coordinate measurement machines to meet tight design tolerances and ensure alignment in mechanical assemblies.
To meet the safety, environmental, and financial criteria of large utility-scale clean energy projects, we operate under a strict quality management system. JUNLONG Machinery has obtained ISO 9001, TS 16949 (IATF 16949), UL, and other quality management system certifications.
These certifications guide process control across our entire production line, supporting our effort to maintain consistent product quality and customer satisfaction. Whether we are producing torque tubes, bearing housings, or structural solar tracker joints, we perform rigorous non-destructive testing (NDT), magnetic particle inspections, and ultrasonic testing to identify and eliminate sub-surface defects before delivery.
Our precision castings provide structural and mechanical components to support key industrial applications worldwide.
Heavy-duty parts for harvesters, seeders, and tillage systems, built to handle mechanical stress and soil friction.
Cable centralizers, downhole tools, and extraction components designed to operate under deep-earth pressure.
Transmission systems, engine support mounts, and chassis brackets conforming to IATF 16949 automotive standards.
Excavator joints, bucket teeth, and heavy suspension connectors designed to support construction operations.
In addition to the industries featured above, we manufacture precision components for Shipbuilding, Architectural Hardware, and Rail Transportation. Our engineering team assists with material selection, geometry refinement, and casting layout to ensure structural performance across all sectors.
Our material formulations and manufacturing tolerances conform to standard international industrial protocols.
| Material Family | Standard Specification | Key Application Areas | Typical Properties |
|---|---|---|---|
| Carbon Steel | ASTM A216 WCB/WCC, 20Mn5 | Transmission components, structural brackets, torque tubes | Excellent weldability, high tensile strength, simple post-treatment |
| Alloy Steel | ASTM A352 LCC, 4130, 8620 | Forklift load links, highly stressed connecting links | High fatigue resistance, high hardness, wear-resistant options |
| Stainless Steel | ASTM A351 CF8/CF8M, duplex | Corrosion protection, marine pump bodies, offshore mounts | Anti-rust, long service life in C5-M high-salinity zones |
| Ductile Iron | QT400-QT700, ASTM A536 | Slewing gearboxes, bearing blocks, tractor joints | Vibration damping, high yield strength, economical complexity |
Common questions about our casting methods, quality control processes, and ordering details.
We cast and process carbon steels (such as WCB, WCC, and 20Mn5), alloy steels for load-bearing fatigue resistance, and stainless steel families (such as CF8 and CF8M) to handle coastal and high-humidity applications. Special materials can be customized according to your specifications.
We run chemical spectrometer tests before casting and perform mechanical verification (tensile, impact, hardness) on each batch. We also check for internal faults using ultrasonic and magnetic particle inspections, and provide surface protection like hot-dip galvanizing to resist long-term environmental corrosion.
Our lost wax process achieves dimensional tolerances of ISO 8062 CT5 to CT7. For closer fits, our internal CNC workshop handles drilling, boring, and milling to meet drawing specifications.
Yes, we provide OEM and ODM design support. Our engineering team assists with part geometry optimization, weight reduction, and material selection to improve casting performance and reduce production costs.
Looking forward, solar tracker designs continue to increase in length and load capacity to accommodate larger bifacial solar modules. This change increases the mechanical stress placed on structural castings.
In response, our R&D roadmap focuses on developing high-strength, low-alloy (HSLA) steels that reduce component weight while maintaining structural capacity. We are also upgrading our casting facilities with robotic mold handling systems to improve consistency and minimize energy consumption, supporting global environmental objectives.
Leverage our 20,000-ton annual capacity and IATF 16949-certified quality systems to secure reliable structural components for your upcoming projects.
Our custom precision components are engineered to meet specific project needs across diverse industries.
Junlong
