Velo3D FAQs: SpaceX, Anduril, Reamers, Mold Tooling, and Laser Types—Answered by a Guy Who's Broken Things

Questions Engineers Actually Ask About Velo3D

I'm the guy who maintains our team's don't do this list for metal additive manufacturing. Six years, 11 documented mistakes, and roughly $230k in wasted budget later, I've collected the questions that actually show up in my inbox. Some are about Velo3D's big-name customers. Others are about reamers, injection molds, and weird laser names. Here are the honest answers.

Questions I'll cover:

• What makes Velo3D the go-to for SpaceX and Anduril?
• Can you skip reaming with Velo3D printed holes?
• Can Velo3D replace China family mold injection molding?
• Is the Halo laser a CO2 laser?
• What mistake should I watch out for in Velo3D projects?
• How should I qualify Velo3D parts for aerospace or defense?

1. What makes Velo3D the go-to for SpaceX and Anduril?

Velo3D is a metal additive manufacturing company from Campbell, California. Their Sapphire printers are built to handle complex geometries—think internal channels, steep overhangs, and lightweight lattice structures. The Velo3D Anduril SpaceX supplier relationship is real: both companies use Velo3D systems, and their public statements confirm it. Why do they care? They need parts that survive high vibration, extreme heat, and unforgiving fatigue loads. Velo3D's software-driven support reduction helps eliminate weak spots you get from traditional supports. But don't take 'no supports' literally—you still need design review, just less support removal.

2. Can you skip reaming with Velo3D printed holes?

Here's where I learned an expensive lesson. In 2019, I approved a batch of Inconel brackets with 6 mm precision holes and told the team that the printer holds ±0.005 mm, so no reaming needed. The holes came out with a slight taper—fine for visual inspection, bad for a pin fit. Our alpha reamer was too small because the hole had closed slightly at the bottom. We had to re-machine all 47 parts at $175 each, plus a 2-week delay. What I learned: use Velo3D for near-net shape, but plan for a final reaming or drilling pass on critical hole features. An alpha reamer with its lead-in chamfer has saved many parts since then—when we actually order it ahead of time.

3. Can Velo3D replace China family mold injection molding?

Short answer: no, not for high-volume plastic parts. A family mold—multiple cavities with different part numbers in one tool—is still the most cost-effective way to make thousands of pieces. China family mold injection molding services are mature and fast; I've used shops there for tooling that makes sense. However, 3D printing can add value to mold inserts, especially conformal cooling channels. I've seen a Velo3D-printed insert reduce a 45-second cycle by 10 seconds because the coolant followed the cavity shape. But the mold base, ejector pins, and side actions still come from a conventional mold maker. If someone tells you that they'll just print the whole mold, run the other way.

4. Is the Halo laser a CO2 laser?

This question came from a confused procurement agent. No. In dermatology, the Halo laser is a hybrid fractional system combining a 1470 nm diode and a 2940 nm YAG wavelength. CO2 lasers sit at 10,600 nm. In metal AM, we use fiber lasers around 1070 nm for most powder-bed machines, including Velo3D's Sapphire. So when you're specifying laser safety equipment, wavelength matters. I once ordered a protective window for a chamber based on a generic label and blocked our alignment laser—spent a morning cleaning up a false fault. Lesson: don't assume the laser name matches the process.

5. What mistake should I watch out for in Velo3D projects?

The biggest one is treating the printer like a CNC. In 2021, I loaded a job that looked fine in simulation, but ignored the thermal stress warning. I thought what are the odds? The part curled, crashed the recoater, and caused $14,000 in damage. That's about the time I decided to run a test coupon on every new geometry. It costs maybe $400 and 6 hours, but it's a lot cheaper than replacing a recoater blade. Now I'm paranoid in a good way.

6. How should I qualify Velo3D parts for aerospace or defense?

Start with traceability: get certified powder, documented process parameters, and a build report. Then run coupons from the same build plate and test mechanical properties. For complex channels, add CT inspection—it's not optional if the part is for a critical flight component. And your internal checklist should include a design review that asks where will this fail?—not how fast can we print? I've seen a 60-part build pass every dimensional check and still fail fatigue because the surface roughness inside the channel was ignored. That's the kind of mistake that erodes trust with a SpaceX or Anduril auditor.