Every engineer I talk to has the same question: how much does CNC prototyping cost? One supplier quotes $500, another quotes $1,500 for the same part. The difference isn't random—it comes down to a few specific factors. Let me break down how CNC prototyping pricing actually works so you can budget with confidence.

The Three Main Cost Drivers

CNC prototyping cost breaks into three categories. Machine time covers how long the part takes to cut. Material cost is what the raw block costs. Setup and labor covers programming, tooling, and fixturing.

Machine time is usually the biggest number. A simple bracket with a few holes might take 20 minutes. A complex part with tight tolerances, deep pockets, and curved surfaces can take hours. The machine runs at a rate per hour, and that adds up fast. I've seen simple prototypes come in under $200 and complex aerospace parts exceed $2,000—all from the same three factors.

Why Setup Cost Matters More Than You Think

Here's something many buyers miss. For a single prototype, the setup cost is a large percentage of the total. A shop might spend two hours programming and fixturing, then only 30 minutes cutting. That setup cost gets spread across the parts you order. Order five identical parts and the per-piece setup cost drops to one-fifth.

I tell clients to think about quantity early. If you need functional testing, ordering five or ten prototypes often makes the per-part cost much more reasonable. The setup is already paid for—adding more parts only adds machine time and material.

Material Choice Changes Everything

Standard 6061 aluminum is affordable and machines fast. Stainless steel 316 takes longer and the raw material costs more. Titanium multiplies both problems. The material you choose directly affects every line of the quote.

Engineering plastics are a different story. Delrin and Nylon machine quickly but require different tooling and speeds. I've had clients save 40% on prototyping by switching from aluminum to a reinforced plastic for fit-and-function testing, then moving to metal for production.

Post-Processing Adds Hidden Costs

A part straight off the machine has visible tool marks. That's fine for functional testing. But if you need a showroom-quality finish, you're adding steps: sandblasting, anodizing, powder coating, or hand polishing. Each step costs time and money.

The same logic applies to tolerances. A ±0.5mm tolerance is standard and fast. A ±0.05mm tolerance requires slower feeds, more passes, and careful measurement. Ask yourself honestly: does your prototype really need production-level tolerances? If not, save the money.

Design Smart to Save Money

The best way to reduce prototyping cost is to design for manufacturability. Internal corners with sharp 90-degree angles need small tools that cut slowly. Increasing the corner radius lets us use a larger tool that removes material faster. This one change can cut machining time by 30% or more.

Clean CAD files also speed up the quoting process. When we get a well-organized STEP or IGES file with clear notes, we can quote within hours. That means faster turnaround and fewer rounds of back-and-forth.

Send your CAD files to chen@aoomtech.com for a quote within 24 hours.