The term 'Machine Rotator' refers to a type of machinery that is used to rotate objects. The two crossword solutions, CAM (3 letters) and ROLLERBEARING (13 letters), are components of the machine rotator. A CAM is a rotating or sliding piece in a mechanical linkage used to transform rotary motion into linear motion, while a roller bearing is a type of bearing that uses rolling elements to reduce friction between two parts. Together, these two components help the machine rotator to rotate objects.