Cams are commonly found in foodservice equipment. A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion. It is often a part of a rotating wheel that is an eccentric wheel or shaft that is a cylinder with an irregular shape that strikes a lever at one or more points on its circular path. Specifications. Height 1.55 in. . Width 3.9 in. . Length 2.35 in.