Square D 79421 Roller Lever Arm MP Class 9007 AA-1

Square D 79421 Roller Lever Arm AA-1 is a cast zinc lever arm for Square D MP Class 9007 limit switches, specifically the AA-1 option in the 9007 family. It features a metal roller assembly with a 16 mm (0.63 in) diameter roller that is 6 mm (0.25 in) wide, mounted on the outside to engage actuators smoothly, and arm lengths available for AA-1 include 22, 35, 38, 51, and 76 mm to fit different actuation strokes. The standard roller is hardened oil-impregnated sintered iron, designed for durability across many cycles in industrial environments, making it suitable for heavy‑duty applications. This AA-1 lever arm is intended for use with 9007AW and 9007C heavy‑duty limit switches in control panels, conveyors, and automation equipment, delivering repeatable actuation and reliable performance in demanding industrial settings.