NP Aerospace 3D prints 110 kg suspension carrier for Mastiff armored vehicle using Caracol WAAM

UK-based NP Aerospace, a specialist in armor manufacturing and military vehicle integration, has produced a 110 kg suspension and differential carrier for the Mastiff armored patrol vehicle using Caracol's VIPRA XP metal WAAM system. The part, measuring 540 × 500 × 500 mm, was printed in 60 hours from ER100 aluminum alloy using cold metal transfer (CMT) technology. The project was executed under the UK Ministry of Defence's TAMPA initiative, in partnership with the Digital Manufacturing Centre (DMC). The near-net-shaped component underwent heat treatment and post-machining to meet structural requirements for dynamic loads and harsh environments.

This application demonstrates that large-format metal DED/WAAM is moving beyond demonstration parts into safety-critical, load-bearing production for defense vehicles. The 50% lead time reduction and elimination of tooling directly address the chronic pain points of low-volume military production: long casting/forging lead times and inflexible supply chains. NP Aerospace's choice to print a structurally critical component - not a cosmetic bracket - signals growing confidence in WAAM's mechanical properties and repeatability. The TAMPA program framework provides a qualification pathway that other defense primes can reference, potentially accelerating adoption across NATO fleets where legacy vehicle sustainment is a multi-decade challenge.

For defense buyers, the practical takeaway is that WAAM can now deliver production-grade structural parts at scale, but the economics depend on utilization rates and post-processing costs. NP Aerospace must demonstrate that this process route is repeatable across multiple units and can be maintained without specialized vendor lock-in. The next credible milestone will be a fleet-wide retrofit program, not a single prototype.