What Happens to a Humanoid Robot When It Breaks Down?

As humanoid robot manufacturers race to scale up production, few are talking about what happens at the other end of a robot's life. According to an op-ed published by The Robot Report and written by Robert Belt, a consultant working with recycling firm Re-Teck, decommissioning a humanoid isn't like scrapping a car or shredding a laptop — it's closer to surgery.

The scale of the problem starts with sheer part count. A single humanoid robot can contain 10,000 to 15,000 individual components, organized into 200 to 500 major sub-assemblies. Belt breaks these down into four systems: an actuation layer of 20 to 40 electric motors paired with precision gearboxes (increasingly sealed into integrated drive modules); a structural skeleton of 30 to 50 elements made from aluminum alloys, carbon fiber, or titanium and held together by 1,000 to 3,000 fasteners; a sensory network of 40 to 80 position encoders and 50 to 200 sensors, including lidar, IMUs, and cameras strung together by miles of internal cabling; and up to 80 memory and storage semiconductor devices running firmware and local processing.

Each of those systems creates its own end-of-life liability, the article argues.

The first is data security. A retired robot's memory can hold proprietary navigation maps, biometric logs, facial recognition data, and behavioral patterns. Unless that storage is physically destroyed or cryptographically wiped, repurposing the hardware could leave backdoors into sensitive enterprise or consumer information.

The second is stored energy. Lithium-ion and lithium-polymer battery packs can't simply be tossed out — punctured or crushed cells risk thermal runaway, toxic gas release, or explosions. Safe handling means reducing packs to "black mass" for material recovery or carefully testing them for second-life use. Hydraulic and pneumatic components add another hazard, since trapped pressure can turn parts into projectiles if not discharged properly.

The third is mechanical fatigue. While reusing high-performance servo motors can make economic sense based on their original mean time to failure, reclaiming structural parts like carbon-fiber frames is riskier — repeated stress can cause sudden, catastrophic failure that's hard to detect after the fact.

The fourth, and per the article the most unexpected, is what it calls the "magnet paradox." A single humanoid can contain 3.5 to 4 kg (7.7 to 8.8 lb.) of neodymium rare-earth magnets — potentially more than an entire electric vehicle's skateboard chassis. Standard industrial recycling relies on bulk crushing, but crushing a humanoid mixes those valuable magnets with shredded aluminum, titanium, and carbon fiber, rendering them useless. Recovering them requires trained technicians to extract magnets by hand, work that carries risks of crush injuries, flying shrapnel, and oxidizing magnet dust that can spontaneously ignite.

Belt's proposed fix is for the recycling industry to work directly with robot manufacturers on "design for recycling" (DfR) principles — moving away from permanent industrial adhesives toward modular cartridges and standardized joints that can be taken apart quickly and safely. Without that collaboration, he argues, robot recycling will remain a slow, dangerous, manual process rather than an efficient circular-economy operation.

Belt, principal of consulting firm Mummy LLC, is currently working with Re-Teck, which specializes in electronics recycling and says it has developed processes for removing delicate components, sterilizing memory, and responsibly repurposing or destroying decommissioned hardware.

As humanoid fleets from companies across the industry move from pilot programs into wider deployment over the coming years, the question of what happens when they wear out is likely to become a much bigger part of the conversation — and, as the article notes, a multi-billion-dollar one.