In precision machining, its high-precision positioning and stable rotational performance can ensure the relative positional accuracy between machining tools (such as cutting tools, laser heads) and workpieces. The hollow structure facilitates the supply of coolant and the layout of laser fiber optic circuits during the processing, improving the quality and efficiency of the machining process.

For example, in precision grinding machines, the hollow rotary actuator rotating platform can accurately rotate the workpiece, resulting in uniform grinding of the workpiece surface. It can also provide cooling fluid through the internal channel of the hollow shaft, effectively cooling the workpiece and grinding tool, and improving grinding quality.