Power transmission products convert energy into motion. They are commonly used in industrial automation, material handling, and construction applications. Rotary motion devices transmit power between rotating parts in a machine. They include chains, belts, pulleys, sheaves, and gears. Linear motion devices transmit power and support motion in a straight line. They include actuators and linear bearings. Bearings extend the working life of wheels, pulleys, and other rotating parts by reducing friction and enabling parts to move smoothly.