During a maintenance day, two operators locked out the lathe to replace the trash gate cylinder. To complete the lockout, the lathe operator raised the trash gate to the pin position while another operator inserted a pin for the gate to rest on while the work is performed. When this event occurred, the lathe operator was in the cab, and the other operator was at the trash gate with the blocking pin. While inserting the pin, the gate rose from the run position to the pin position, pinching the injured employee's left middle finger and resulting in a fingertip amputation.