The Morse taper gauge is an important measuring instrument that plays a key role in mechanical engineering. Their principle of operation is based on the standardized taper specification of the Morse taper. The Morse taper gauge is a precisely designed plug and ring gauge that fits into the inner or outer taper of the part being inspected. In terms of application, they are widely used to check the taper of mechanical parts such as tool shanks and machine tool spindle bores to verify compliance with standards. In the machining process, deviations from the newly machined taper can be detected in a timely manner, guaranteeing the accuracy of the fit between the parts and the reliability of the connection. With accurate measurement and judgment of taper compliance, Morse taper gauges play a vital role in ensuring product quality, achieving interchangeability of parts and enhancing production efficiency. Care must be taken during use to ensure that the gauge and the part being measured are intact, resulting in accurate and reliable measurements.