About Us

GB3 Machine Works provides end-to-end manufacturing services, specializing in precision machining, advanced 3D printing, product design, and assembly. Founded by engineer and entrepreneur Galo Barros, the company is built on a strong foundation of engineering expertise, research experience, and a passion for solving complex manufacturing challenges. With a background in CAD/CAM design, materials testing, and product development, GBIII Prototyping Solutions bridges the gap between concept and production. From rapid prototypes to small- and medium-scale manufacturing runs, the team combines technical knowledge with hands-on craftsmanship to deliver high-quality, cost-effective solutions. The mission is clear: empower innovators, startups, and businesses to bring their ideas to market with speed, precision, and confidence.

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Certification We Offer

  • Certificate of Conformance (CoC / C of C)

    Ensuring part delivered meet the customer's drawing, specs, and PO requirements.

  • Material Certification (Mill Cert / MTR)

    Material test report from the supplier (showing chemistry, heat lot, hardness, etc.)

  • Inspection Report/ First Article Inspection Report (FAIR)

    A full dimensional inspection of parts off a new setup. Including methods of inspection.

  • Certificate of Calibration

    Measuring equipment (calipers, mics, gauge blocks, pin gauges) is calibrated and traceable to NIST standards.

  • Process Certification

    Traceability when using process of heat treat, plating, anodizing.