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FT CASTING
Marine docks are critical infrastructures that face constant exposure to saltwater, heavy mechanical...
Automobile&Truck Casting Steel Parts
Automobile & Truck Steering Knuckle
The steering knuckle is a critical safety component in cars and trucks. Located inside the wheel, it connects the suspension system to the wheel hub and primarily handles steering control and load-bearing tasks.
Structure and Function
The steering knuckle is typically made of forged steel or cast iron, with a fork-shaped structure to accommodate the multi-dimensional rotational demands of the wheel. Its core functions include:
Transmitting steering force, allowing the wheel to rotate about the kingpin to achieve steering
Bearing the vehicle's vertical loads as well as the forces and torques associated with braking and cornering
Connecting components such as the upper and lower suspension arms and brake calipers
Material and Processing
Material: Commonly forged steel or cast iron. Trucks often use cast iron to reduce costs, while passenger cars may use aluminum alloy to reduce unsprung mass.
Processing: The process includes blank forging and machining. Machining the fork is technically challenging, requiring consistent and perpendicular kingpin hole alignment.
Application Differences
Passenger car steering knuckles: Typically a split-piece design, emphasizing lightweighting and precision
Commercial vehicle steering knuckles: Mostly a one-piece structure, emphasizing durability and load-bearing capacity.
