Cummins
Crankshaft for Cummins 6B
This crankshaft is designed for Cummins 6B and 6C diesel engines. It serves as the primary rotating component that converts the linear motion of the pistons into rotational energy.
Specifications
- Part number
- 3905619
- Brand
- Cummins
The crankshaft 3905619 functions as the mechanical core of the engine, converting the reciprocating linear motion of the pistons into continuous rotational movement. This conversion is necessary to transmit power from the engine to the transmission and subsequent drive systems in machinery and heavy vehicles. The component features precision-machined connecting rod journals and main bearing journals that facilitate rotation within the engine block while maintaining the necessary alignment for power transfer.
This part is compatible with Cummins 6B and 6C engine models. It includes integrated counterweights designed to balance the inertial forces generated by the movement of the pistons and connecting rods during operation. Proper lubrication of the bearing surfaces is required to manage friction and support the rotational load of the engine assembly.
A crankshaft acts as the central axis of an internal combustion engine, supporting the torque loads generated during the combustion cycle. By facilitating the conversion of energy, the crankshaft ensures that the power produced by the engine is effectively delivered to the drivetrain or hydraulic systems required for machine operation.

