Leaf Spring Center Bolt

Product Introduction

Structure

This leaf spring center bolt is a precision-machined alloy steel fastener designed for heavy-duty truck leaf spring suspension systems. It features a hexagonal flange head for enhanced clamping force, a smooth cylindrical shank, and a precision-threaded end. The entire component is finished with a zinc-plated passivation coating, which imparts a metallic, iridescent appearance and provides excellent corrosion resistance.

Performance

Manufactured from high-grade alloy steel (e.g., 42CrMo) and subjected to controlled heat treatment, this bolt achieves a tensile strength grade of 12.9, exhibiting exceptional fatigue resistance and yield strength. It is designed to withstand the extreme dynamic loads, impacts, and torsional forces encountered in heavy-duty operation, maintaining structural integrity in temperatures ranging from -40°C to 120°C. The zinc-plated passivation coating provides superior protection against rust, salt spray, and chemical exposure, ensuring long-term durability in diverse operating environments. The precision-machined threads ensure a tight, secure fit, minimizing play and ensuring consistent performance.

Core Function

1. Serves as a critical fastening component for leaf spring assemblies, clamping the multiple steel leaves together and maintaining their alignment and structural integrity.

2. Transmits and distributes complex loads such as vertical pressure, lateral torque, and longitudinal impact from the leaf spring to the chassis, maintaining the integrity of the suspension system.

3. Maintains precise alignment of the leaf spring leaves, preventing relative displacement under dynamic conditions such as vehicle acceleration, braking, and turning, avoiding abnormal wear of suspension parts.