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Precision Metal & Plastic
Manufacturing

Delivering high-quality CNC machined parts, metal stampings, castings, forgings, extrusions, and mechanical seals to global industries since 2005. Engineered for performance, built for reliability.

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Why Loncong?

A trusted partner in precision manufacturing, combining decades of expertise with cutting-edge technology to deliver engineered solutions across diverse industrial sectors.

Our Mission

We bridge your engineering needs with our manufacturing solutions, addressing your pain points through strict quality control, punctual delivery, and attentive service. Located in Ningbo — a major sea port city near Shanghai — we offer seamless logistics for global export.

Business Philosophy

"Quality is life, Service is the aim." This guiding principle drives every process, interaction, and innovation at Loncong. We believe outstanding customer service is the foundation of lasting partnerships.

CNC Machining Center Metal Stamping Press Aluminum Extrusion Quality Inspection

Core Capabilities

From concept to completion, we offer end-to-end manufacturing services with in-house engineering, tooling, and production control to ensure precision, consistency, and speed.

CNC Machining

Full 3-5 axis CNC machining centers for complex geometries. Materials: aluminum, steel, stainless, brass, plastics.

Metal Stamping

Blanking, piercing, forming, drawing. High-volume production with tight tolerances.

Metal Casting

Die casting and sand casting in aluminum, iron, and other alloys. Post-casting machining available.

Metal Forging

Hot and cold forging for high-strength components used in heavy-duty applications.

Aluminum Extrusion

Custom profiles with burr-free finishing. Ideal for structural and thermal management parts.

Plastic & Rubber

Injection molding and rubber forming for seals, gaskets, and insulating components.

Mechanical Seals

Precision-engineered sealing solutions for pumps, compressors, and rotating equipment.

Tooling & Die Making

In-house tool design and fabrication for stamping, molding, and forming processes.

Welding & Fabrication

TIG, MIG, and spot welding. Sheet metal fabrication and assembly services.

Featured Products

Engineered for performance and reliability across construction, mining, aerospace, marine, food processing, and more. All parts are OEM/ODM customizable.

SPU-M011 Casting

SPU-M011

Cast and CNC machined component. High durability for industrial applications.

Category: Metal Casting & Machining
SPU-M013

SPU-M013

Precision-machined part with tight tolerances. Ideal for mechanical systems.

Category: CNC Machining
SPU-M002

SPU-M002

Aluminum 6061 CNC machined part. Lightweight and corrosion-resistant.

Category: Machining / Aluminum
SPU-M003

SPU-M003

Custom-machined component for sealing and structural applications.

Category: Machining
SPU-M023

SPU-M023

High-precision part with complex geometry. Suitable for aerospace use.

Category: CNC Machining
SPU-M006

SPU-M006

Durable machined component for heavy machinery and mobile equipment.

Category: Machining
SPU-M014

SPU-M014

Robust part designed for industrial environments with high load requirements.

Category: Metal Casting
SPU-M018

SPU-M018

Gray Iron cast and CNC machined. Excellent wear resistance and stability.

Category: Metal Casting / Machining
SPU-M001

SPU-M001

General-purpose machined component. Versatile for multiple applications.

Category: CNC Machining
Custom Mechanical Seal

SPU-MS Series

Custom mechanical seals for pumps and rotating equipment. Leak-proof design.

Category: Mechanical Seals
Aluminum Extrusion Profile

SPU-AE Series

Custom aluminum extrusion profiles for structural and thermal applications.

Category: Aluminum Extrusion
Stamped Metal Component

SPU-ST Series

High-volume stamped metal parts with consistent quality and finish.

Category: Metal Stamping

Quality Assurance

Every component undergoes rigorous inspection and testing to meet international standards. Our modern production lines and high-precision instruments ensure consistency and reliability.

100%

Inspection on Critical Dimensions

ISO

Compliant Processes

24/7

Production Monitoring

2005

Years of Manufacturing Excellence

Our Process

1

Design & CAD Engineering

2

Tooling & Die Making

3

Production & Machining

4

Inspection & Testing

5

Packaging & Delivery

Industries We Serve

Our components are trusted in demanding environments across the globe.

Construction
Mining
Aerospace
Marine
Food Processing
Petroleum
Agriculture
Material Handling
Mobile Equipment
Automotive
Industrial Machinery
Energy & Power

Get in Touch

Ready to start your next project? Contact us today for a quote or technical consultation.

Phone: +86 574 8730 9199
Company: Ningbo Loncong Metal Products Co., Ltd.
Location: Ningbo, China (Near Shanghai Port)
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