Yaskawa Motoman EPH4000/EP4000 T-Axis Speed Reducer

The Yaskawa Motoman HW0380794-B is a highly specialized mechanical speed reducer engineered specifically for the dynamic wrist axes of ultra-high-capacity industrial robots. Its primary intended purpose is to serve as the critical transmission mechanism for the T-axis (the tool flange rotation axis at the very end of the arm). It achieves this by taking the high-speed, low-torque output from an AC servo motor and converting it into the extraordinarily high-torque force required to manipulate massive payloads with absolute precision. In highly automated manufacturing environments, this reducer ensures absolute mechanical rigidity, near-zero backlash motion, and exceptional repeatability. A key feature of the 153961-1 is its incredibly durable internal gearing structure, specifically designed to withstand continuous stress cycles and extreme dynamic loads while maintaining a compact footprint directly within the robot's massive cast wrist housing. It is most notably deployed in the powerful EP4000, EPH4000N, and PH200RF series, typically managed by standard industrial controllers like the DX100, DX200, or YRC1000.