Aluminum CNC Machining Services in China
Source custom aluminum milled and turned parts through qualified manufacturing partners in Shenzhen. Jack coordinates alloy selection, DFM review, quotation, finishing requirements, and quality follow-up.
Choosing an Aluminum Alloy
Aluminum is widely used for housings, brackets, heat sinks, robotics parts, optical components, fixtures, and lightweight structures. The right alloy depends on strength, corrosion resistance, machinability, anodizing response, thermal behavior, and material availability. Grades below are common examples; final availability and certification are confirmed in the quotation.
| Alloy | Typical Buying Considerations |
|---|---|
| 6061 | General-purpose machining, balanced strength, corrosion resistance, and finish options. |
| 7075 | Higher strength where weight matters; cost, corrosion protection, and material condition need review. |
| 6063 | Often considered for profiles and parts where appearance and anodizing response matter. |
| 5052 | Good corrosion resistance and formability; machining route depends on geometry and temper. |
Machining and DFM Considerations
- Thin walls can move during roughing, deburring, or anodizing.
- Deep pockets and narrow slots may require long-reach tools and slower cutting.
- Small internal radii can add special-tool cost.
- Flatness and position requirements should reference functional datums.
- Threads, inserts, sealing surfaces, and masking areas should be identified on the drawing.
Surface Finishing for Aluminum Parts
Common finish routes include as-machined, bead blasted, brushed, polished, clear or colored anodized, hard anodized, conversion coated, powder coated, plated, or painted. Color samples, gloss level, masking, rack marks, and cosmetic acceptance criteria should be agreed before production. Anodizing can affect dimensions, so critical fits and threads need coating allowances.
Inspection and Documentation
Inspection is planned from the drawing. Depending on the order, deliverables can include a dimensional report, first-article inspection, material certificate, finish certificate, or photos before shipment. These items must be requested during quotation so the selected partner can confirm method, cost, and lead time.
What to Send for Quotation
- 3D CAD and a controlled 2D drawing
- Alloy and temper, or the functional requirement if material is open
- Quantity now and estimated repeat demand
- Finish, color reference, masking, and cosmetic areas
- Critical dimensions and required inspection documents
- Delivery location and target date
Related Services
For complex parts, see 5-axis CNC machining. For pilot batches, review low-volume CNC machining. You can also compare surface finishing options and our broader CNC machining services.
Frequently Asked Questions
Can you match a specific anodized color?
A color reference can be reviewed, but anodized color varies with alloy, surface preparation, geometry, and batch conditions. Agree on a sample or acceptance range when appearance is critical.
Should I specify 6061 or 7075?
Specify the alloy when it is a design requirement. If it is not fixed, share the strength, weight, corrosion, and finish requirements so suitable options can be compared.