Short Description

The kingpin is the critical connecting component between the semi-trailer and the tractor saddle. It bears all dynamic loads during starting, braking, turning, and rough road conditions. Manufactured by precision forging technology, our kingpins offer a dense grain structure, zero porosity, and excellent strength and fatigue resistance.

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Key Features

· Material: High-quality alloy steel (20CrMnTi / 42CrMo / SAE 4140, etc.)
· Process: Precision forging + CNC machining for high dimensional accuracy
· Heat Treatment: Carburizing / quenching / tempering, surface hardness HRC 58–62 with tough core
· Surface Finish: Anti-corrosion coating (zinc plating, Dacromet, painting, etc.)
· Standard: Conforms to ISO / SAE / GB/T standards; custom sizes available
· Compatibility: Suitable for various semi-trailers, full trailers, and construction machinery

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Applications

· Semi-trailer truck connections
· Construction machinery flatbed trailers
· Agricultural trailers and special vehicle towing systems

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Customization

OEM & ODM services welcome. Custom diameters, lengths, thread types, and surface finishes are available upon request. Sample testing supported.

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Why Choose Us

· Precision Forging Process – Ensures superior strength and longer service life
· Strict Quality Control – 100% inspected before shipment
· Competitive Pricing – Factory direct, no middleman
· Fast Delivery – Flexible production capacity for bulk orders

Kingpin – Precision Forged Chassis Parts for Trailers & Semi-Trailers

T3030 brake chamber