Crankshaft

The crankshaft is the rotating core of the engine. As the pistons move up and down during combustion, their force is transferred via connecting rods to the crankshaft, which turns it into rotational movement. This torque is then passed on to the drivetrain, ultimately powering the wheels.

Crankshafts are made from forged or cast steel, specifically engineered to handle intense loads, vibrations, and thermal expansion. They rotate on main and rod bearings, lubricated with pressurized engine oil to reduce friction and wear.

Any damage or imbalance in the crankshaft can cause major engine problems — including loss of oil pressure, abnormal noises, reduced performance, or even engine failure. Proper balancing, tight tolerances, and clean oil supply are essential for crankshaft reliability.

Key features and uses:

• Converts piston motion into rotation

• Includes journals, counterweights, and oil passages

• Built from hardened steel or nodular cast iron

• Resists torque, heat, and mechanical stress

• Crucial for power delivery and engine balance

At Sanders Parts, we supply high-performance crankshafts that are precision-machined, balanced, and built to last — for strong and stable rotation under every load.