When your component exceeds the capacity of standard CNC machining centers, Jiangzhi provides the equipment, engineering expertise, and large part machining services required for oversized and heavy workpieces. As an experienced large CNC machining supplier, we specialize in machining large parts with reliable dimensional accuracy and consistent quality. Our dedicated large parts machining department operates 35 large-format CNC machines, allowing us to machine large metal and engineering plastic components with reliable dimensional accuracy and consistent quality.

For standard-sized components, please visit our CNC Machining service page. This page focuses specifically on oversized and heavy workpieces that require dedicated large-format equipment.

Large Parts Machining Capabilities

Our CNC capabilities for large parts are designed for oversized metal and engineering plastic components that require extended machining travel, rigid workholding, and heavy-load handling.
Capability Spec
Maximum part length 4,000 × 2,500 × 1,500 mm (157" × 98" × 59")
Maximum part weight 10,000 kg (22,000 lbs)
Machine count 35 machines
Processes Milling, Turning, Boring
Tolerance Up to ±0.05 mm (±0.002")
Materials Metal, Plastic

Why Large Parts Require a Different CNC Approach

Large parts place different demands on CNC machining than standard-sized components. As part size increases, maintaining accuracy becomes more challenging because the workpiece is heavier, machining distances are longer, and additional setups may be required if the equipment cannot accommodate the entire part. Every extra setup increases the chance of dimensional variation and adds production time.

At Jiangzhi, large components are machined using dedicated large-format CNC equipment designed for oversized workpieces. By combining large-format machining, rigid workholding, and in-house material handling, we reduce unnecessary setups and keep the entire machining process under one roof. This helps customers achieve more consistent accuracy, shorter production cycles, and fewer risks when manufacturing oversized components.

Large Part Machining, Covered End to End

From milling to turning to boring, here's what each process can deliver for your oversized components:

Our Large CNC Machining Workshop

CNC Machining Center Workshop
CNC Workshop Drilling Machine
Custom Injection Molds Workshop
CNC Turning Machine
CNC machines
Mold Workshop CNC Centers

FAQ About Large CNC Machining

We can machine components up to 4,000 × 2,500 × 1,500 mm (157" × 98" × 59") with a maximum workpiece weight of 10,000 kg (22,000 lbs). If your part is larger or has unique machining requirements, send us your drawing for an engineering review.

Usually, yes. Large parts require more setup time, heavier fixturing, additional material handling, and longer machining cycles. The final cost depends on the part size, complexity, material, and quantity.

Yes, when appropriate. Splitting an oversized component into multiple machined sections can reduce machining difficulty, transportation costs, and the risk of distortion. Our engineers can recommend the best approach based on your design.

Large parts generally take longer to machine because they require more setup, handling, and machining time. Lead time depends on the part size, material, complexity, and production quantity. A production schedule will be provided after reviewing your drawings.

The most common materials are aluminum, carbon steel, stainless steel, cast iron, and engineering plastics such as POM, Nylon, UHMW, and PTFE. The best choice depends on your application, strength requirements, and operating environment.

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