The 803-A8W rotation cam limit switch is manufactured by Allen-Bradley and it is one of the standard 803 models of Cam Limit Switches, with certain series modifications. Rotation cam limit switches are widely used in industrial applications, mainly with packing machines and machines that operate with a repetitive cycle. These switches can be modified to comply with the requirements of any process. The Allen-Bradley 803-A8W rotation cam limit switch has one standard left shaft, 8 circuits or cams, and an external rotation mechanism, along with rugged cast iron side plates and an anti-vibration mechanism. The Allen-Bradley 803-A8W rotation cam limit switch has a double contact that allows it to operate at 25 Amps and with a maximum shaft speed of 150 RPM. The cam duration is approximately of a range between 15 and 346 degrees.

The protection of the Allen-Bradley 803-A8W rotation cam limit switch consists of a general purpose enclosure, defined as NEMA type 1. This enclosure enables the 803-A8W unit to operate exclusively indoors, impeding the entrance of solid particles such as dust, and providing enough protection to all the wiring mechanism and internal parts of the cam. The enclosure and base of this part are made of a durable, heavy steel. The Allen-Bradley 803-A8W rotation cam limit switch also comes with an important modification, which allows it to change the relative position between the driving mechanism and the shaft, turning the camshaft in 5 increments. The mechanism consists of the installation of an external adjustment sprocket of 48 teeth and a diameter of 5.73 inches (145.64 millimeters).