At about 2:45 p.m. on August 22, 2022, an employee was using a hand grinder to grind down a weld bead on a shaft. The grinder cut through the bead, and the change in momentum caused his left hand to contact the grinder wheel. He suffered a laceration to the back of the hand between the thumb and index finger, and was hospitalized. The grinder was not guarded at the time.