When sourcing custom metal parts from China, one of the most common questions buyers ask is: Should I choose sheet metal fabrication or CNC machining? Both are excellent manufacturing processes, but each has its strengths. This guide will help you make the right choice.
What is Sheet Metal Fabrication?
Sheet metal fabrication involves cutting, bending, and welding flat metal sheets into finished parts or assemblies. Common processes include:
- Laser cutting
- CNC bending / press brake forming
- MIG and TIG welding
- Powder coating and surface treatment
Best for: Enclosures, brackets, frames, panels, housings, and structural components.
What is CNC Machining?
CNC machining uses computer-controlled cutting tools to remove material from solid stock, producing high-precision parts. Common operations include:
- CNC milling
- CNC turning (lathe)
- Drilling and tapping
- Surface grinding
Best for: Shafts, flanges, gears, connectors, and parts requiring tight tolerances (±0.01mm or better).
Key Differences at a Glance
- Material form: Sheet metal uses flat stock; CNC machining uses solid billets or bar stock.
- Tolerances: CNC machining achieves tighter tolerances.
- Cost for large parts: Sheet metal is generally more cost-effective for large, thin-walled parts.
- Strength: CNC-machined solid parts are typically better for load-bearing applications.
- Lead time: Both can be fast — typically 7–15 days for production.
Which Should You Choose?
Choose sheet metal fabrication if your part is thin-walled, large in size, or requires welded assembly. Choose CNC machining if your part has complex geometry, tight tolerance requirements, or is machined from solid material.
Still not sure? Send us your drawings and our engineers will recommend the best process — for free.
Why Choose Xinhe Metal?
- 10+ years of metal manufacturing experience
- One-stop service: stamping, sheet metal fabrication & welding, CNC machining
- Materials: cold-rolled steel, carbon steel, stainless steel, aluminum
- Free quote within 24 hours
- Prototype in as fast as 3 days
- Serving clients in the US, Europe, and Southeast Asia
Contact Us
- 🌐 Website: xinhe-metal.com
- 📧 Email: xdong5990@gmail.com
- 💬 WhatsApp: +86 136 8532 9697
- 📍 Location: China (serving US, Europe & Southeast Asia)
- ⏱ Response time: within 24 hours