We started US Actuator because we watched the humanoid robotics industry accelerate faster than its supply chain could keep up — and because high-precision components like roller screws, torque motors, and joint actuators were increasingly sourced overseas, even by companies building "American" robots.
Scaling high-precision components such as screws, bearings, and high-performance actuators remains one of the hardest problems in humanoid robotics — current supply chains simply weren't built for mass-volume humanoid production. US Actuator exists to solve that specific problem for North American robotics companies: a domestic source for the joint-level actuation that humanoid platforms depend on, engineered in lockstep with the OEMs who use it.
Every product decision starts from real joint requirements, not a spec sheet written in isolation.
Final assembly and QA happen in the USA — not as a marketing line, but as a resilience strategy.
We prioritize getting evaluation units into engineers' hands quickly, then iterating with them.
Our production processes are designed from day one to scale from prototype runs to volume manufacturing.
Founded with a focused mission: build the high-torque-density actuators that North American humanoid robotics programs need, without dependence on offshore roller-screw and torque-motor suppliers.
Engineering specs for our flagship rotary joint (RJ) and linear roller-screw (LX) product families are defined around 100+ Nm/kg power density and sub-millisecond control loop targets.
Final assembly, coil winding, and QA lines stood up domestically to support both prototype and early production volumes.
Working directly with humanoid robotics and industrial automation OEMs on joint-level integration ahead of broader production availability.
Our facility houses engineering, final assembly, and quality-assurance operations under one roof, keeping design and manufacturing teams in constant contact — critical when iterating on custom joint variants for design partners.
We're actively working with a small number of robotics OEMs on early integration programs.