JUNLONG
Precision  Casting High-Quality Supplier

Delivering Excellence in Casting Solutions


Our company will continue to strengthen the research and development of new products and new technologies, integrate advanced management and technical resources, create a strong brand, and strive to build an international first-class precision casting supplier!

Precision Cast Auto Components Our company specializes in producing high-precision investment cast auto parts, including engine castings, transmission housings, and brake calipers. Crafted with advanced lost-wax casting technology, these components feature tight dimensional tolerances (±0.05mm) and excellent surface finish, fully meeting OEM standards for global automobile manufacturers. Custom Cast Aluminum Alloy Auto Parts We offer custom-made cast aluminum alloy auto components tailored to client requirements. Lightweight yet durable, these parts reduce vehicle weight while improving fuel efficiency. Suitable for engine brackets, suspension links, and wheel hubs, they are widely used in passenger cars and commercial vehicles. Stainless Steel Cast Auto Accessories Our stainless steel cast auto accessories are designed for harsh environments, with outstanding corrosion resistance and high-temperature durability. Ideal for exhaust system components, brake system parts, and chassis fittings, these products undergo strict quality inspection to ensure long service life and reliable performance. OEM Precision Casting Solutions for Auto Industry As a professional precision casting manufacturer, we provide one-stop OEM solutions for the automotive industry. From design optimization and mold development to casting, machining, and surface treatment, we ensure each product meets the specific technical requirements of our customers, helping them reduce production costs and improve market competitiveness.


About Us
Weifang Junlong Machinery Co., Ltd is a leading precision casting manufacturer in China, specializing in the production of high-quality cast components. With an annual output of 20,000 tons, we serve a diverse range of industries, including construction machinery, automotive, rail, petroleum, and mining. Our expertise lies in providing customized solutions using materials such as carbon steel and alloy steel. Our quality management systems are certified to ISO 9001 and IATF 16949  standards. Committed to timely delivery and customer satisfaction, we welcome your drawings for customized casting solutions.
Superior Quality Casting Services
Your Trusted Partner for Precision Castings

Stainless steel casting

Stainless steel casting using advanced medium temperature wax silica sol process, the size can reach ISO8062-CT4-CT6, common words valve, impeller and other products, a wide range of applications

Alloy Steel Casting

With our alloy steel casting expertise, we produce high-strength and corrosion-resistant castings suitable for demanding industries. Our advanced alloy steel casting techniques result in durable and dimensionally accurate components.

Carbon Steel Casting

Our carbon steel casting services provide strong and reliable components for various industrial applications. We ensure precise manufacturing processes to deliver carbon steel castings with excellent mechanical properties.


Accepting Orders and Confirming Requirements

Accepting Orders and Confirming Requirements

The machining facility first accepts the order and carefully confirms the customer's requirements, including material, dimensions, processing techniques, and other specifications.

Processing Technique Planning

Processing Technique Planning

Detailed processing plans are developed, including selecting appropriate processing equipment, workflow, tooling, etc., to ensure the quality and precision of the final product.

Manufacturing

Manufacturing

Using lathes, milling machines, grinding machines, and other processing equipment, the raw materials are cut, shaped, and machined according to the customer's requirements.

Quality Inspection and Testing

Quality Inspection and Testing

During the processing, quality inspectors conduct checks to ensure the product meets specifications. This may include dimensional checks, visual inspections, material testing, etc.

Surface Treatment (if applicable)

Surface Treatment (if applicable)

If the customer requires special surface treatments, such as painting or coating, these steps are performed after the machining is completed.

Packaging and Delivery

Packaging and Delivery

The final product is appropriately packaged use wooden box to ensure it remains undamaged during transportation. The product is then delivered to the customer.


Technological Advancement Boosts Production Efficiency

The company has recently introduced advanced CNC precision casting technology to enhance production efficiency and product quality.

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Steps of the precision casting

Precision casting is a manufacturing process used to produce high-precision, complex-shaped components, commonly employed in aerospace, medical devices, automotive, and other industries.

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Advantages of the lost wax casting for ESP cross coupling cable protector

*What are Cross Coupling Cable Protectors?** Cross coupling cable protectors are specially designed devices that provide a protective cover for cables and hoses on construction sites. They are made from durable materials such as rubber or plastic and are designed to

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What is a qualified precision casting?

Precision casting, also known as investment casting, plays a vital role in the manufacturing of engineering machinery parts. This specialized casting process allows for the production of complex and intricate parts with high precision and quality.

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Junlong precision casting introduction

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Five advantages of precision casting

Explore the innovative world of precision casting with our article titled 'Five Advantages of Precision Casting'. Delve into the benefits this manufacturing process offers, from enhanced accuracy and superior surface finish to flexibility in material and design choices.

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Material characteristics of cast carbon steel

Material characteristics of cast carbon steelCast carbon steel is manufactured by adding a certain proportion of carbon elements to the casting material during the production process. Its main characteristics are high strength, high hardness, good wear resistance, high tensile strength, strong ductility and good processing performance. The strength and hardness of cast carbon steel are mainly related to the size of its carbon content, and cast

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ESP cable protector supplier in China

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Precision casting factory

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Cross coupling cable protectors for oil field

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Are you looking for a reliable foundry? Weifang Junlong Precision Foundry is a factory you can trust.

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Are you looking for a reliable foundry? Weifang Junlong Precision Foundry is a factory you can trust.

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  • Fangzi District,Weifang City, Shandong Province,China
  •  Mon-Fri - 08:00-17:00