The SM 7817 Alternator Rotor Assembly is a high-precision electrical component specifically engineered for Bosch-style (B. Type) charging systems used in the Tata 407 light commercial vehicle (LCV) series. Built to O.E. (Original Equipment) Specifications, this rotor is designed to replace the internal rotating core of Bosch alternators, ensuring seamless compatibility and maximum charging efficiency. Precision-wound with high-conductivity copper, it is built to withstand the heavy-duty cycles of the Tata 4SP diesel engine platform.