CNC prototype service · Rapid CNC machining
CNC rapid prototyping in real materials
CNC prototype machining from a single part: machined prototypes in the same aluminum, steel, titanium or plastic as production, quoted within 12 hours, made in 7 days or expedited in 3–4 days.
Why machine a prototype instead of printing it
A 3D print shows you the shape. A CNC prototype shows you the part. When the prototype has to carry load, seal, dissipate heat, hold a bearing fit or survive a drop test, it needs to be made from the real material with real tolerances. Machined 6061-T6 behaves like machined 6061-T6 in production. A printed approximation does not.
Our CNC prototype service makes single parts and small sets in the same materials and finishes you plan to use later: aluminum, stainless, steel, brass, copper, titanium and engineering plastics such as POM and PEEK, with anodizing, bead blasting, powder coat or plating if the test needs it. Because the process is the same one used for low-volume production, what you learn on the prototype carries straight into the next batch.
- Quote within 12 hours with DFM notes, reviewed by an engineer.
- Made in up to 7 days, or 3–4 days expedited.
- Express shipping by DHL, FedEx or UPS, 3–5 days with tracking.
- Inspection report with critical dimensions on every order.
CNC prototypes vs 3D printing vs urethane casting
Each prototyping method has a place. We only do CNC machining and sheet metal, so here is a neutral comparison to help you decide whether CNC is the right call for this iteration.
| CNC machining | 3D printing | Urethane casting | |
|---|---|---|---|
| Materials | Production metals and plastics | Printing resins, nylons, some metals | Polyurethanes simulating ABS, PP, rubber |
| Mechanical properties | Same as production stock | Often anisotropic, lower than wrought | Close to, but not the same as, molded plastic |
| Typical accuracy | ±0.03 mm standard | Commonly around ±0.1–0.3 mm, process dependent | Commonly around ±0.2–0.3 mm |
| Geometry freedom | Limited by tool access | Very high, internal channels OK | High, follows the master pattern |
| Best quantity | 1 – 1,000 | 1 – tens | 10 – 50 per silicone mold |
| Use it for | Functional, structural, thermal, fit tests | Early form studies, complex shapes, quick iterations | Cosmetic plastic parts before injection molding |
A practical sequence used by many hardware teams: print early concepts locally on day one, then machine the design once it is stable enough to test function. If the final part will be injection molded, a machined plastic prototype tests fit and strength, and urethane castings later check cosmetics in larger numbers.
Machining a part that will later be molded? Design the prototype with draft and uniform walls anyway, so you are testing the geometry you will actually tool.
Fast CNC machining: realistic timelines
Rapid CNC machining from China is fast, but it is not overnight. Plan with these numbers:
- Upload and quote: within 12 hours, with DFM notes.
- Approve and pay: PayPal, card via PayPal, or bank transfer.
- Machining and finishing: up to 7 days standard, 3–4 days expedited.
- Inspection and packing: critical dimensions measured and recorded.
- Express shipping: 3–5 days door to door, DDP pricing on request.
Expedited orders typically land on your desk in about a week to ten days from upload; standard orders in about two weeks. Finishes add little to that because they are done in the same order. Parts needing heat treatment or an unusual material grade may take longer, and the quote will say so.
How to get prototypes faster and cheaper
- Send STEP plus a drawing. A clean drawing saves a round of questions. See preparing CAD files.
- Mark only the tolerances that matter for the test. ±0.03 mm is standard; everything tighter costs time. See tolerances.
- Use common stock: 6061-T6 instead of 7075 when strength allows, 303 instead of 316 when corrosion allows.
- Order two or three of each part. A spare costs much less than the first one, because setup and programming are already paid.
- Skip cosmetic finishes on test parts unless the finish affects the test.
For milling and turning specifics, see CNC milling and CNC turning.
FAQ
CNC prototyping questions
How fast can I get a CNC prototype?
Expedited production takes 3–4 days, plus 3–5 days express shipping. Standard production is up to 7 days. Quotes come back within 12 hours of upload.
Can I order a single prototype?
Yes. The minimum order is 1 piece. Ordering two or three often costs little extra because setup is already done.
Should I use CNC or 3D printing for my prototype?
Use 3D printing for early shape studies and geometry that cannot be machined. Use CNC when the prototype must have production material properties, tight fits or a real surface finish.
Can prototypes be anodized or painted?
Yes. Prototypes can get any of our finishes, including Type II and Type III anodizing, bead blasting, powder coating, plating and laser marking, in the same order. See surface finishes.
Is my prototype design kept confidential?
Yes. We sign your NDA or ours before review, and files are only shared with the engineers who quote and make the part.