Recently, Ningbo Shitai Precision Machinery Co., Ltd has been granted three more utility model patents by CNIPA in the field of precision machining, including "motor shaft tangential keyway machining device", "motor shaft end face keyway machining fixture" and "shaft workpiece automatic adjusting mechanism". The new patents include "Motor shaft tangential keyway machining device", "Motor shaft end face keyway machining fixture" and "Shaft workpiece automatic adjusting mechanism". The new patents significantly improve the efficiency and stability of motor shaft machining by optimising the clamping accuracy, adaptive adjustment and automatic control. The company's technical director said: "The landing of these patents marks the further consolidation of our technical barriers in the field of high-end precision shaft machining, and will accelerate the process of domestic substitution in the future."