The SM 2000 is a specialized Alternator Rotor (Armature Assembly) designed specifically for the heavy-duty alternators used in Komatsu PC 200 Series Excavators and related earthmoving equipment. This rotor features the distinctive Socket-type shaft configuration required for industrial charging systems. Engineered to O.E. (Original Equipment) Specifications, it is built to withstand the extreme vibration and continuous high-load cycles typical of construction and mining environments.