Aluminum Extrusion and CNC Machining, In One Facility
Most suppliers do one of the two and subcontract the other. We run both, which is why the profile tolerance and the machined tolerance are agreed in the same conversation — and why nobody loses your part in a hand-off.
- CNC accuracy
- ±0.01 mm
- Profile section
- ±0.05 mm
- Minimum wall
- 0.3 mm
- Tooling
- 4–5 days
The tolerance you need is decided at the die, not at the machine
An extruded part starts with a cross-section tolerance of ±0.05 mm. Machining then closes the critical features to ±0.01 mm. If those two stages sit in different companies, every change becomes a negotiation and every defect becomes someone else's fault.
We extrude on two automated lines in Shenzhen and machine in the same building, with a founding team that has spent 20 years in aluminum extrusion, backed by the same team on the machining side. That combination matters in three concrete ways:
- One datum. The machining fixture is built from the same profile the extruder runs, so the bore and the outer wall share a reference.
- Faster DFM loops. A wall that will not fill is caught at die design, not after the first article.
- No double lead time. Tooling in 4–5 days and a sample in about 7 days are our numbers, not a chain of two suppliers' numbers.
Die casting, forging and stamping are quoted and managed by our engineering team, with the production route confirmed in writing on the quotation. What we still do not run ourselves is plastic moulding and sheet metal bending. That boundary is deliberate: those two are separate tool disciplines with their own failure modes, and pretending to offer them would make our extrusion advice less honest.
Capability facts
- CNC accuracy ±0.01 mm on machined features
- Profile cross-section ±0.05 mm as extruded
- Wall thickness capability ±0.02 mm, down to 0.3 mm minimum
- Bore and OD ±0.04 mm
- 2 fully automated extrusion lines, 5,000 m² production floor
- Die in 4–5 days, first sample in about 7 days
Five Capabilities, One Engineering Team
Each page covers what the process can hold, what it cannot, and how we prove it before parts ship. Extrusion, machining, finishing and tooling are in-house. Precision machining in other metals and engineering plastics is quoted and managed by the same team, so you get one review, one quote and one point of contact.
Aluminum Extrusion
6063 and 6061 profiles to ±0.05 mm cross-section, with the wall, fins and bore formed in the die. Includes the three-process comparison table.
Open Aluminum Extrusion
CNC Machining
The stage that closes the tolerance: bores, sealing faces, threads and hinge fits held to ±0.01 mm on extruded blanks.
Open CNC Machining
Surface Finishing
180# bead blast anodizing without polishing, plus brushing, sand blast and powder coating. Color approved on a physical chip first.
Open Surface Finishing
Tooling & Prototyping
Die design in 4–5 days, first article in about 7, and an honest volume threshold before you pay for tooling.
Open Tooling & Prototyping
Precision Machining
Milled and turned parts in aluminum, stainless steel, steel, brass, copper, titanium and engineering plastics, from one-off prototypes to 10,000-piece runs.
Open Precision MachiningLooking for precision machined parts in steel, titanium and engineering plastics? That is a separate capability, handled by the same engineering team.
Which process holds which number?
Use this as a first filter. The full eight-dimension comparison, including die casting, are all quoted and managed by our team, with the first column as our main line.
| Stage | What it decides | Value we hold | Where it goes wrong |
|---|---|---|---|
| Extrusion | Wall thickness, fin geometry, outer profile, material soundness | ±0.05 mm cross-section ±0.02 mm wall capability |
Thin walls that will not fill; die lines on cosmetic faces |
| CNC machining | Bores, sealing faces, threads, hinge and port fits | ±0.01 mm machined features ±0.04 mm bore and OD |
Deflection on 0.3 mm walls; movement after stress relief |
| Finishing | Color, texture, corrosion resistance, appearance consistency | Color chip approved before production | Polishing marks left under the anodic layer |
| Inspection | Whether the lot ships | Dimensional plus appearance check on every lot | Measuring a part the way it will be assembled |
Figures are the tolerances we hold in production, not best-case lab values. See Quality & Inspection for how they are verified.
How we choose your route
Your drawing decides the route. A supplier who says yes to every process is telling you they will subcontract the ones they cannot make.
Four questions that decide the route
- What material is it? Aluminum extrudes. Stainless, steel, brass, copper and titanium are machined. Engineering plastics are machined.
- What is the wall thickness? Below 0.5 mm, extrusion is the practical route. Above it, both work and the die cost decides.
- How many per year? Above roughly 500 for large parts and 2,000 for small parts, a die pays for itself.
- What is the geometry? A shape with pockets, bores and threads runs on machining; a wall that must be thin and even runs on extrusion.
We will tell you which box your part belongs in — and if the honest answer is that it needs a process we do not run, we will say so before you spend money on tooling. Plastic moulding and sheet metal bending are the two we do not run ourselves.
What we do instead
When a part is marginal for extrusion, we usually suggest one of three things: a modified cross-section that still extrudes, a machined-from-extrusion hybrid where only the features are cut, or a machined-from-billet route at low volume before tooling is justified.
All three keep the part in one facility, which is the only reason we can promise tolerances across two processes.
Not sure which route your part needs?
Send the drawing or describe the part. We will come back with a process route, the tolerance we can hold, and the annual quantity at which tooling pays for itself.
What to send
- 2D drawing or 3D model (STEP, IGES, DWG, DXF, PDF)
- Alloy and temper
- Surface finish and color
- Estimated annual quantity