Unguarded machinery claims far too many limbs and lives from workers around the world. Such tragedies can be avoided by better training for machine operators, and most importantly, by making machines in the workplace safer. This course examines dozens of possible ways to safeguard machinery. This course has been prepared as an aid to employers, employees, machine manufacturers, machine guard designers and fabricators, and all others with an interest in protecting workers against the hazards of moving machine parts. It identifies the major mechanical motions and the general principles of safeguarding them.