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🔬 Prototype & R&D Components

Precision CNC machined one-off samples, proof-of-concept parts, and pilot run components with fast turnaround and no MOQ

⏱ 2-4 monthsAll machinable materialsCustomer-supplied materialsRapid material sourcing

Typical Parts We Machine

  • One-off prototype machined parts
  • Proof-of-concept mechanical assemblies
  • Pilot run production components
  • Functional test specimens
  • Design verification samples
  • Engineering change order parts

Materials

All machinable materials · Customer-supplied materials · Rapid material sourcing. Full material certs available on request.

Quality

Every part is CMM-inspected with full report included. Cpk ≥ 1.33 on critical dimensions. Free FAI with every new part.

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Frequently Asked Questions

How quickly can you machine a prototype?

We offer industry-leading prototype turnaround: 24 hours for simple turned/milled parts (1-5 operations), 3-5 days for complex multi-axis parts requiring 5-axis milling and EDM. We operate a DMG MORI 5-axis machine dedicated to rapid prototyping with priority scheduling available.

What's the minimum order quantity for prototypes?

We have no minimum order quantity for prototypes. Single-piece prototypes are welcome. Our setup and programming processes are designed for quick changeover, so the cost per piece for 1-5 units remains competitive. This is ideal for design validation and functional testing before production commitment.

Do you offer design for manufacturability (DFM) feedback?

Yes — it's one of our core services. Our engineering team reviews your part design and provides DFM feedback before production: recommended tolerance relaxation areas, tool-access limitations, suggested feature modifications for cost reduction, and material alternatives. DFM feedback typically arrives within 4 hours of receiving your model.

Can you prototype in materials other than aluminum?

We prototype in virtually all machinable materials: aluminum (6061, 7075, 2024), steel (1018, 4140, A2, D2), stainless steel (303, 304, 316, 17-4PH), titanium (Grade 2, 5), brass, copper, PEEK, Delrin, Nylon, PTFE, and engineering plastics. We also have experience with Inconel, Monel, and Hastelloy for specialized applications.

What inspection reports do you provide with prototypes?

Each prototype ships with a detailed inspection report including: all critical dimensions measured, surface finish readings, material certification, and photographs of key features. For functional prototypes, we also provide a fit-check report if assembly dimensions are critical. CMM reports are available on request.

How do you handle design revisions during prototyping?

We actively support iterative prototyping. If a revision is needed after first-off inspection, we update the CAM program and deliver the revision within 1-2 working days. We track each revision with version control and provide updated engineering feedback on the design changes. No minimum MOQ for revisions.

Buying Guide

CNC Prototype Machining — From CAD to First Article in Days

1. DFM Feedback Before Cutting

Send us your CAD model before finalizing the design. Our engineers review for manufacturability — identifying thin walls, deep pockets, and tool access issues that can be corrected before prototype cutting.

2. Material Selection for Prototypes

Prototypes can use the same material as production or a more machinable substitute for speed. Aluminum 6061 is the fastest material to prototype, and results are representative of most metal parts.

3. The Cost of Tight Tolerances on Prototypes

Specifying production tolerances on a prototype dramatically increases cost and lead time. Use ±0.1mm for non-critical features. TruPart can advise which tolerances are truly needed for functional testing.

4. Surface Finish Options at Prototype Stage

As-machined finish is adequate for fit and function testing. Add cosmetic finishing only if the prototype is for customer demo or trade show display. Secondary operations add 2-3 days.

5. How Many Prototypes Do You Actually Need?

For most mechanical validations, 3-5 units are sufficient for form, fit, and function testing. Ordering more than 10 prototypes rarely provides additional design insight and increases cost linearly.

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