SMRTR Science & EngineeringJul 22, 2026Hacker News

Deep Dive on Actuators

SMRTR summary

Actuators—motors, sensors, and gearing—account for 40–60% of humanoid robot build costs, making them a key barrier to affordability. Most robotics firms now build actuators in-house, while China leads global supply, backed by ~$20B in government funding.

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