Abstract: At approximately 10:00 a.m. on August 19, 2006, Employee #1 was operating a mill at a furniture and artwork studio. A jig with a threaded steel bit was mounted on the chuck of the mill. The bit held an acrylic disk (approximately 24 in. in diameter) that was threaded into the center of the acrylic disk and held in place by washers and nuts. The normal operating speed for the assembly was 210 RPM (the lowest setting on the mill). However, during the day before, the mill was set at 2125 RPM for a different operation. Employee #1 did not reduce the speed to 210 RPM before beginning work. When the bit failed, the disk came loose from the mill and struck Employee #1's abdomen. He was hospitalized at Los Angeles County USC Medical Center, where he died later that day.