The SM 4922 is a heavy-duty Starter Drive (Self Drive) engineered specifically for high-torque industrial applications. It is the primary engagement component for Nikko 4.5kW starter motors, commonly found in Komatsu PC130 series excavators. Featuring a reinforced 11-tooth pinion, this unit is built to withstand the extreme cranking resistance of mid-sized industrial diesel engines in rigorous construction and earthmoving environments.
