Any machine part, function, or process that can cause injury must be safeguarded.  According to OSHA, the employer is responsible for providing a safe and healthful workplace for their employees. Typical examples of machines on which injuries may occur include: band saws, circular saws, punching, bending, clearing jams, threading, rotating motion, transverse motion, woodworking, grinding, meat packing, changing out production line etc. For more information, visit OSHA.