A traditional servo rotary actuator consists of a rotor, stator, housing, bearings, end caps, and feedback components. A frameless motor removes all redundant mechanical structures and retains only the electromagnetic conversion core. The rotor becomes a direct part of the load shaft, while the stator is integrated into the machine structure through bonding, locking, or potting.

The core requirement of a five-axis rotary table is to achieve continuous and smooth cutting of complex spatial surfaces. This demands that the rotary table not only withstand cutting forces but also exhibit extremely high rigidity and absolute zero backlash. The Harmonic Servo Rotary Actuator fundamentally eliminates issues such as backlash, wear, and elastic deformation inherent in worm gear systems, making it the optimal choice for high-end five-axis rotary tables.