Screws are commonly used fasteners. In general, the term “fastener” refers to machine components comprising screws and bolts used to affix two or more components together. Screw production consists of three steps, namely, heading, threading, and coating. During the forming process, the mold used may be damaged as a result of defects in the metal wire or metal bar. In this study, we employed the CBF-43S screw-forming machine developed by Chun Zu Machinery Industry as the monitoring target and performed kinetic analysis on the slider–crank mechanism of the machine using the provided parameters. Subsequently, the forging force of the machine was measured by a force sensor and its real time changes were recorded. When an error value was identified, the machine was immediately shut down and the mold was inspected for damage. Through this method, the detrimental effect of damaged molds on the quality of screws and bolts can be prevented.