Today’s OEM components are no longer simple brackets or housings. Many customers now require:

• ±0.005 mm tolerance on sliding cores

• 0.8–1.6 μm Ra surface finish for sealing interfaces

• Lot-to-lot consistency for automated assembly

• Documented traceability (RoHS, REACH, Material Certificate 3.1)

In our factory’s 2024 testing, switching from standard 6061-T6 to precision-milled 7075 reduced deformation by 22% in high-load robotics joints. This difference is why OEM producers rely heavily on CNC technology—it gives predictable accuracy at scale.

People want to know:

• How CNC machining OEM parts are made

• What tolerances are achievable

• How to choose materials

• How to avoid quality issues

Buyers look for:

• Lead time

• MOQ

• Unit pricing

• Surface finishes

• Shipping options

Engineers search for:

• CNC turning vs. CNC milling cost

• Aluminum vs. stainless steel strength

• Supplier capability comparison

The article below integrates all three search intentions.

From our real project logs, 27% of failed orders came from incomplete technical drawings: missing chamfers, wrong tolerances, or unspecified threads.
Best practice:

• Provide STEP + PDF

• Include tolerances (GB / ISO / DIN)

• Note any functional surfaces

Common OEM materials:

• Aluminum 6061 / 7075 – lightweight, ideal for drones & machinery

• Stainless steel 304 / 316 / 17-4PH – high corrosion resistance

• Brass / Copper – conductivity parts

• POM / PEEK – high-stability engineering plastics

Practical note:
In our tensile tests (machine: WDW-20E), 7075-T6 reached 562 MPa, almost double that of 6061. Customers often underestimate this difference.

We normally run:

• DMG Mori for tight tolerances

• Brother Speedio for high-speed aluminum

• Swiss-type lathes for micro turning (Ø0.8–8 mm)

Typical tolerances:

• Milling: ±0.01–0.02 mm

• Turning: ±0.005–0.01 mm

• Hole position accuracy: ±0.015 mm

Available options:

• Anodizing (Type II / Type III)

• Bead blasting

• Nickel plating

• Black oxide

• Passivation

• Laser engraving

Measured data example (2024 internal test):

• Hard-anodized 7075 surface hardness reached HV 420–450

• Bead blasting before anodizing reduced visible tool marks by 85%

Critical checks:

• CMM measurement

• Surface roughness test (Mitutoyo SJ-210)

• Salt spray test for plating

• First article inspection (FAI)

We push all dimensional reports to customers in PDF + Excel format for transparency.

A telecom client needed 5,000 pcs of aluminum housings with multiple threaded holes and a ±0.02 mm tolerance on flatness.

Initial problem:
Milling each cavity separately made the cycle time too long.

Solution:
We redesigned the machining path + used a custom fixture to machine the part in one setup.

Results:

• Machining time reduced from 11.8 min to 7.4 min

• Defect rate dropped from 3.1% to 0.4%

• Total cost saved 18.6%

This is the type of optimization OEM buyers value most.

Suppliers who refuse usually outsource production.

For safety-critical parts, always require:

• PPAP

• Full CMM report

• Material certificate

Look for:

• 3-axis + 4-axis + turning centers

• Brand: DMG, Haas, Brother, Mazak

• Quality team with CMM, projector, height gauge

If a supplier claims “±0.005 mm for all parts,” that’s a red flag.

Our data shows prototyping reduces mass-production revisions by 41%.

Prices vary based on material, complexity, tolerance, and surface finish.
Typical ranges (real 2024 shop data):

If you'd like, I can adjust this based on your actual factory prices.

Prototype: 3–7 days
Production: 10–25 days depending on volume.

Most suppliers accept 1 piece, but cost per unit decreases significantly above 100 pcs.

Yes. Most OEM orders include customer logos, batch numbers, or QR codes.

STEP, IGES, Parasolid, DXF, PDF.