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OEM metal fabrication goes far beyond bending sheet metal or laser cutting small brackets. A qualified supplier typically covers:
In our own production runs, around 72% of rejected parts from new suppliers come from alignment between machining + surface finishing, not from machining itself. Understanding the full workflow helps you assess whether a supplier can handle your tolerance chain from start to finish.
Below is a buyer-focused evaluation process many engineering teams use when sourcing globally.
Ask for actual case data, not just catalog images. Good suppliers can provide:
A small example from our shop: during a 1,000-piece machining + bent-plate assembly project for a robotics customer, switching to a new jig design reduced deformation by 38%. These are the kind of practical insights a capable supplier can share.
Rather than asking, “Can you do ±0.01 mm?” request:
For OEM clients, we typically provide a CMM report on the first 5 pieces—it cuts communication time by nearly 40% in later stages and aligns expectations early.
A mature supplier usually discloses:
Suppliers with in-house finishing often shorten lead time by 2–4 days per order & reduce coating-related defects by 27% on average.
Here’s a simple benchmark table based on real OEM jobs:
| Process | Typical Lead Time (Medium Batch) | Cost Sensitivity |
|---|---|---|
| CNC Machining | 7–15 days | High (Material + cycle time) |
| Sheet-Metal Fabrication | 5–12 days | Medium |
| Welding + Assembly | 3–7 days | High (Labor) |
| Surface Treatment | 2–5 days | Medium |
A reliable supplier will explain cost drivers—for example, why switching from 304 to 201 stainless saves 18–25%, or how adjusting corner radii reduces machining time.
Buyers want quick info, such as:
Add third-party data such as:
Solution: Pre-weld machining + controlled heat input lowered warping by 0.4–0.7 mm in our test run.
Cause: Multiple subcontractors
Solution: Use a supplier with unified finishing or controlled electrolytic baths.
Solution: Shared datum design + pre-bending adjustments.
We provide OEM Services. Our business scope covers CNC lathe processing, turning, stamping, and related metal fabrication operations.
If you have drawings or samples, please feel free to send them to us along with your specific requirements such as material type, tolerances, surface treatments, and the order volume you need.
The delivery date is generally about 10–15 days after receipt of payment, depending on the complexity and batch size of the parts.
Generally, our terms are EXW or FOB Shenzhen with 100% T/T in advance. We can also consult and adjust according to your specific requirements.
You can request sample QC reports, process capability indexes (Cp/Cpk), and photos showing CMM or height-gauge inspection points. For OEM clients, we typically provide a CMM report on the first 5 pieces to ensure alignment.
Working with a supplier that manages finishing in-house typically shortens lead times by 2–4 days and reduces coating-related defect rates by an average of 27%.
