Custom Robot Prototype Manufacturing

AI is moving fast, and the robotics industry is moving with it. Robot development cycles keep getting shorter. Teams need working prototypes fast — for structural testing, functional validation, investor demos, and trade shows — and the prototype has to hold up under all of it.

A good robot prototype needs more than a nice-looking shell. It needs assembly precision and enough structural strength to survive repeated testing and handling, while still looking close to the final production part.

SG Prototype builds robot prototypes for clients across Europe, North America, and Asia

Pacific, using CNC machining, 3D printing, vacuum casting, surface finishing, and full assembly. Here's how we typically approach the main robot categories we see.

Robot Vacuums

For robot vacuums, the shell finish and overall assembly fit matter most.

We machine the housing from ABS on CNC, paint it to your Pantone or RAL spec, and finish seams, buttons, and sensor cutouts by hand, so the part reads as production-grade rather than prototype-grade.

The internal chassis is usually vacuum cast in PU. It's faster than machining the whole thing from solid stock, and it still gives you realistic weight and enough strength for functional testing and demos.

Lead time: 15–18 working days

Medical Robots

Medical robot prototypes are usually built for product validation, clinical demos, trade shows, or ergonomic evaluation — which means tight tolerances and clean surface finishes matter more here than almost anywhere else.

Housings are typically CNC machined from ABS or PC and painted white or light grey, matching the finish convention for medical equipment. Complex control panels are often better suited to SLA printing, and clear viewing windows are machined from PC or PMMA.

Internal brackets and moving mechanisms are usually CNC machined from 6061 aluminum for assembly accuracy and stability. If you need to show the internal mechanism, we can also build a transparent-shell version.

Lead time: 15–20 working days

Humanoid Robots

Humanoid robots typically have a lot of parts, and keeping tolerances consistent across all of them is the real challenge.

Shells are usually SLA printed for surface quality; load-bearing joints and connecting structures are CNC machined in aluminum for the strength-to-precision ratio. During assembly, we hold gaps between parts tightly so the finished unit looks clean and holds together through repeated testing.

Lead time: 20–25 working days, depending on part count.

Industrial Robotic Arms

Robotic arms are about dimensional accuracy and motion performance — appearance is secondary here.

Arm bodies are typically machined from 7075 aluminum, joint flanges from stainless steel, and we hold critical mounting and bearing bore tolerances to ±0.05 mm so the arm can handle continuous-run testing.

Lead time: 12–15 working days

Autonomous Mobile Robots (AMR)

AMRs tend to be large enough that the shell needs to be split into panels and assembled rather than machined as one piece.

Body panels are CNC machined and joined with tight, near-invisible seams. Sensor housings with complex geometry are usually SLA printed. Tray doors and sliding mechanisms are machined from POM (Delrin) for smooth, low-wear operation.

Lead time: 20–25 working days

Why SG Prototype to Custom Robot Prototype Manufacturing

Depending on what your robot project needs, we can put together a full prototyping plan covering:

· CNC precision machining (metals and engineering plastics)

· SLA, SLS, and FDM 3D printing

· Vacuum casting for small batches

· Painting, silk-screening, anodizing, and electroplating

· Multi-process assembly

Whether you need a look-and-feel model, a functional prototype, or a small pilot batch, we can help you shorten the development cycle and get to validation faster.

Get a Quote

Send us your STEP, IGES, or X_T files along with what the prototype is for, and we'll come back with a quote within 24 hours.

If your design isn't finalized yet, a sketch, 3D concept, or reference part works too — our engineers can help you figure out the right process.

FAQ

Q: What's the fastest turnaround for a robot prototype manufacturing? 

A single CNC part can ship in 7–10 working days. A full assembly involving CNC, 3D printing, painting, and assembly usually takes 15–25 working days.

Q: Can you sign an NDA? 

Yes. We sign mutual NDAs as standard and keep all design files and project data confidential.

Q: Can you build robot shells larger than one meter?

 Yes. For shells too large to machine in one piece, we split them into panels and join them with high-precision seams so the finished part still looks and fits like a single unit.

Q: Do you build functional prototypes, not just look-and-feel models?

 Yes. We machine structural metal parts and moving mechanisms and handle full assembly, so the prototype is ready for functional testing, not just display.