Explore our foundational range of custom manufactured industrial steel, iron, and alloy components trusted by global tier-one supply chains.
Within the industrial logistics and material handling sector, structural equilibrium determines efficiency, load capacity, and operational safety. A forklift's counterweight is not merely a dense block of metal; it is a highly engineered safety component designed to offset forward loading moments. When material handling equipment (MHE) operates near maximum load centers, the counterweight acts as the stabilizing force that maintains the vehicle’s center of gravity within its stability triangle.
As a leading cast-iron and steel components foundry, JUNLONG Machinery Co., Ltd. specializes in the development, metallurgy, and deep finishing of high-performance cast counterweights. Located in Weifang, Shandong—the manufacturing core of China's heavy industry corridor—we leverage advanced mold design and robotic pouring workflows to produce weights characterized by zero volumetric shrinkage, consistent density profiles, and smooth external surfaces ready for top-coat industrial paint systems.
Discover the operational metrics that define Junlong Machinery's status as a world-class tier-one supplier for industrial OEMs.
Equipped with internationally advanced automated casting production lines, green sand processes, and resin sand pouring stations to maintain tight dimensional tolerances and uniform grain structures across small and large runs.
Combining heavy-duty engineering expertise with a complete quality control system. Our precision cast components are systematically exported to overseas markets including Germany, the United States, Italy, Canada, and Japan.
Proudly serving as a key developer of precision heavy castings for construction machinery, logistics machinery, automotive engineering, rail infrastructure, oil exploration, and high-load agricultural equipment.
Maximizing OEM Sourcing Value: Sourcing industrial forklift counterweight castings requires more than simple metal pouring. To ensure correct balancing performance, each unit must undergo precise surface machining, mounting hole threading, and alignment verification. JUNLONG Machinery offers a seamless, in-house pipeline that covers every phase of production:
1. Tooling and Mold Design: Custom mold fabrication utilizing high-accuracy tooling ensures the structural integrity of the casting from the initial pour. This step critical for avoiding surface abnormalities and air pockets.
2. Material Formulation and Melting: In our automated foundry, we formulate custom gray cast iron (such as ASTM Class 30, Class 35, Class 40) and ductile iron alloys. Our process optimizes density profiles, ensuring maximum mass in the smallest envelope.
3. Advanced CNC Machining: Equipped with horizontal and vertical machining centers, CNC lathes, and heavy grinding machines, we mill mounting pads, bore precise pin holes, and machine threads to exact tolerance guidelines.
4. Industrial Paint & Surface Coating: We apply anti-corrosive primer systems, customized top coats, and texturing to ensure the counterweight stands up to harsh industrial work environments.
Ensuring that our products meet rigorous international standards for performance, environment, and occupational safety.
We work extensively with Grey Iron (EN-GJL-150 to EN-GJL-300) for standard cost-efficient weight requirements, and Ductile Iron (EN-GJS-400 to EN-GJS-700) where impact resistance, high tensile strength, and structural fatigue life are paramount.
Our quality management is audited against ISO 9001 and IATF 16949 standards. Certifications through international testing houses like UL and CE ensure seamless integration into automotive, shipping, and material handling systems worldwide.
Our labs execute mechanical and chemical testing, including spectroscopic analysis of metal chemistry, ultrasonic non-destructive testing (NDT), coordinate measuring machine (CMM) dimensional checks, and surface roughness profiling.
Located in Shandong province, Weifang provides proximity to Qingdao Port. We manage maritime logistics, complete customs declarations, and handle packaging with reinforced crates and anti-rust coatings for safe sea transit.
Our manufacturing and testing workflows meet stringent international directives, giving your engineering team complete peace of mind.
Our castings balance stability and mechanical performance in demanding heavy-duty environments.
Custom lost wax and sand-cast parts for agricultural equipment, harvesters, and tractors. Engineered to resist impact and abrasion during field operation.
Valves, pumps, and high-pressure fittings capable of resisting chemical wear and thermal stress in offshore and onshore oil exploration installations.
Chassis components, engine mounts, and structural parts cast under strict IATF 16949 standards for durability and structural integrity.
Excavator linkages, crane pivot heads, and heavy load-bearing structural counterweights that support safe operations under extreme stress loads.
Automated casting runs, physical laboratories, and precision machining technologies form the foundation of our operations.
Precision-machined high-demand castings deployed across the material handling, agricultural, and automotive sectors.
High-precision investment cast machinery parts with tight tolerance and stable mechanical performance.
Precision casting of machinery parts utilizing lost wax technologies and optimized chemical compositions.
Pump valve accessories precision casting, made of premium alloy steel and stainless steel for wear resistance.
Alloy steel investment casting for forklift parts, featuring high precision, strong toughness, and wear resistance.
Industrial carbon steel casting components made by lost wax investment casting, featuring strict dimension control.
Custom lost wax casting agricultural machinery components for farming equipment, harvesters, and farm vehicles.
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.
Get answers to technical, logistical, and design-related questions about sourcing forklift weights from China.
For standard counterweights where space is not highly constrained, Grey Cast Iron (GG20 / GG25 / ASTM Class 35) is the industry standard due to its cost-effectiveness, excellent castability, and high vibration-dampening characteristics. However, for specialized electric material handling equipment with tighter spacing or extreme operations where drop and structural impacts are likely, Ductile Iron (GGG40 / GGG50 / ASTM 65-45-12) is preferred. This material provides significantly higher tensile strength and elongation metrics to prevent stress cracking.
Thick-section castings are prone to shrinkage and inner gas porosity if cooled too quickly or non-uniformly. We mitigate this using advanced solidification simulation software (such as MAGMA) during the mold gating system design phase. Additionally, we integrate customized risers and chill designs, closely manage pouring temperatures, and use premium inoculants to control graphite crystallization, ensuring uniform density throughout the block.
We cast according to ISO 8062 general dimensional casting tolerances, typically achieving CT10 to CT12 grades for raw cast components. For surfaces with higher precision requirements, our in-house CNC machining workshop handles milling, drilling, and turning to tighter tolerances (±0.02mm). Standard weight tolerances for raw cast counterweights are controlled to within ±3% of the target design weight, and can be optimized to ±1% using custom machining modifications.
Yes. We offer ready-to-assemble solutions, delivering products that are fully machined, primed, painted in custom colors, and packaged to meet your requirements. We use heavy-duty polyurethane and epoxy coating systems that resist oil, water, rust, and salt spray testing (exceeding 240 hours), matching your precise color standards.
JUNLONG Machinery combines decades of engineering expertise with high production capacity to deliver high-quality castings on schedule. Whether you need custom weights for material handling equipment or other industrial machinery components, our engineering team can review your CAD designs (DWG, STEP, IGS) and deliver optimization feedback and structural analysis.
We serve leading brands in Germany, the United States, Italy, Canada, and elsewhere. Contact our technical sales office today to start your project.
From complex automotive levers to high-stress train and valve accessories, we offer high precision across diverse applications.
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