Prototype Manufacturing
Prototype manufacturing: CAD to parts in days.
Building a hardware prototype? Get CNC machined parts in real engineering materials — plus sheet metal and 3D printing — from one supplier, quoted in minutes and checked by an engineer.
Which process for your prototype
The cheapest part is rarely the cheapest path to a working product. If the prototype has to prove function — strength, fits, threads, tolerances — machine it in the real material. Prints are the quick shape check before that, not a substitute for it.
| Process | Tolerance | Lead time | Typical starting price | Best for |
|---|---|---|---|---|
| CNC machining | to ±0.01 mm | from 7 days | from ~$90/part | Functional prototypes in real engineering materials — final strength, machined threads, bearing fits. The closest thing to production truth. |
| Sheet metal | ±0.1 mm | from 7 days | from ~$70/part | Enclosures, brackets, and panels — laser cut, bent, and welded in the production material from part one. |
| 3D printing | ±0.2–0.5 mm | from 3 days | from ~$20/part | Early form, fit, and ergonomics checks. Printed plastics are weaker than billet and hold looser tolerances — most teams move to machined parts for functional testing. |
| Injection molding (rapid tooling) | ±0.05 mm | from 14 days | Tooling from ~$1,500 | Only when you need 100+ parts in the final molded plastic — bridge tooling, not a first-prototype tool. |
The 10-second decision rule:
±0.01 mm
Choose CNC machining when…
The part has to work: real 6061 or steel, machined threads, bearing fits, and tolerances your assembly depends on. The default for functional prototypes.
production-identical
Choose sheet metal when…
It is an enclosure, bracket, or panel. Laser-cut and bent parts are production-identical from the very first unit.
form studies
Choose 3D printing when…
You are checking shape, fit, and ergonomics early. Prints trade strength and tolerance for speed — plan the functional build in metal.
What a prototype run costs
The one number that surprises first-time buyers: the single prototype is the expensive one. Setup — CAM programming, fixturing, first-piece inspection — costs the same for 1 part as for 10, so the second and third units are nearly free by comparison.
Aluminum sensor bracket (50 × 40 × 10 mm, 6061-T6) — sampled from the FabDigit quote engine
Practical consequence: if assembly or testing could consume a part, order 3 instead of 1 — the extra units ride on setup you have already paid for. The full breakdown of what drives these numbers (material, tolerances, finishes, quantity) is in the CNC machining cost guide.
Example prices were sampled from the live FabDigit quote engine in September 2026 for the exact reference geometry described, then rounded. Shown for comparison, not as a quote — your part is priced on its own geometry and confirmed by engineering review.
Upload today, parts this week
A typical prototype order, upload to door. Complex multi-axis work, specialty finishes, or long-lead materials add days — the quote states your actual date before you commit.
- Minutes — preliminary price. Upload a STEP file and the quote engine reads geometry, material, finish, and quantity while you watch.
- Hours — engineering review. An engineer checks 50+ DFM risk areas and confirms the quote before it ships. Issues come back as suggestions, not surprises.
- Day 1 — production release. You confirm, we release to the matched production line with the full spec package.
- Days 2–7 — parts made. Machined and sheet metal prototypes typically finish in ~7 days; printed form studies in ~3. Expedite is available on most jobs.
- Ship — QC report included. Dimensional inspection against your drawing, then tracked shipping to your door.
Design tips before you upload v1
Prototype-stage versions of the DFM checks our engineers run on every quote — each one cuts cost or lead time without changing what you learn from the build.
- Default to aluminum 6061 or ABS. Both machine/print fast and cheap. Switch to the exotic material only when v1 proves the design.
- Tolerance only what mates. Leave ±0.1 mm general and call out tighter bands on the two or three features that need them.
- Take the as-machined finish. Anodize and powder coat are lot charges that sting at quantity 1–3. Save finishes for the looks-like build.
- Order a spare per two parts. Assembly and testing always consume a unit. The marginal part is cheap once setup is paid.
- Split complex geometry. Two simple machined parts with a bolted joint usually beat one 5-axis showpiece on both price and lead time.
- Send STEP, add PDF only for critical callouts. A clean STEP quotes instantly; a drawing is only needed where a tolerance or thread must be guaranteed.
Prototype manufacturing — FAQ
How fast can I get prototype parts?
CNC machined and sheet metal prototypes typically ship in about 7 days after quote confirmation; 3D printed form studies in about 3. Same-week expedite is available on most jobs. The quote itself takes minutes: upload CAD, get a preliminary price, and an engineer confirms it within hours.
How much does a hardware prototype cost?
A small CNC machined aluminum part runs about $90–100 as a one-off and drops fast with quantity — the same bracket priced at $92 for one piece is $19.40 per part at ten, because setup cost amortizes. 3D printed form studies start around $20, with the usual strength and tolerance trade-offs. See the FabDigit CNC machining cost guide for full example price curves.
Which process should I pick for a first prototype?
If the prototype has to prove function — strength, fits, threads, or any real tolerance — CNC machine it in the actual material: printed plastics are anisotropic and typically hold only ±0.2–0.5 mm. Use 3D printing for early form-and-fit checks before that. Enclosures, brackets, and panels: sheet metal, production-identical from the first unit. Injection molding only makes sense once you need 100+ parts in molded plastic.
Can you keep my prototype design confidential?
Yes. Uploaded files are access-controlled and used only to quote and produce your parts, NDAs are available on request, and manufacturing partners operate under signed confidentiality and quality agreements.
Do I need a 2D drawing or is CAD enough?
A STEP file is enough to quote and build most prototypes. Add a PDF drawing only for critical tolerances, thread callouts, or inspection requirements — those become part of the QC criteria.
What happens after I upload my CAD file?
The quote engine returns a preliminary price in minutes. A FabDigit engineer then reviews the design against 50+ DFM risk areas and confirms the quote — typically within hours — before anything is released to production.
Your prototype, priced in minutes.
Upload a CAD file, pick a process, and get an engineering-reviewed quote before you commit a dollar.