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High-Strength Wheel Bolts

High-strength wheel bolts are critical safety components connecting wheel hubs and rims in automobiles, trucks, buses, construction machinery, and agricultural machinery. A typical set of high-strength wheel bolts usually includes the bolt body and a matching wheel nut, sometimes with a flange or guide cone. Because wheels bear radial loads, lateral forces, braking torques, and road impacts during operation, high-strength wheel bolts must possess extremely high shear resistance, fatigue strength, and anti-loosening properties. In the commercial vehicle and mining vehicle sectors, failure of high-strength wheel bolts can directly lead to wheel detachment and serious accidents; therefore, their manufacturing process often adheres to stricter quality control standards. Furthermore, with the increasing demands for unsprung mass and braking performance in new energy vehicles, high-strength wheel bolts are continuously evolving towards lighter weight and higher corrosion resistance.

Product Description

High-strength wheel bolts are critical safety components connecting wheel hubs and rims in automobiles, trucks, buses, construction machinery, and agricultural machinery. A typical set of high-strength wheel bolts usually includes the bolt body and a matching wheel nut, sometimes with a flange or guide cone. Because wheels bear radial loads, lateral forces, braking torques, and road impacts during operation, high-strength wheel bolts must possess extremely high shear resistance, fatigue strength, and anti-loosening properties. In the commercial vehicle and mining vehicle sectors, failure of high-strength wheel bolts can directly lead to wheel detachment and serious accidents; therefore, their manufacturing process often adheres to stricter quality control standards. Furthermore, with the increasing demands for unsprung mass and braking performance in new energy vehicles, high-strength wheel bolts are continuously evolving towards lighter weight and higher corrosion resistance.

Product Feature

Preferred Impact-Resistant Materials: High-quality alloy steels such as 42CrMo, 40Cr, SCM435, and ML40Cr are commonly used. After tempering (quenching + high-temperature tempering), a tempered sorbitic structure is obtained, resulting in excellent comprehensive mechanical properties. The head and shank are not welded or subjected to secondary machining, maintaining intact fiber flow lines.

High-Precision Threads and Fit: Thread precision is typically 6g or higher (e.g., 4h), ensuring a stable torque-clamping force relationship with the hub nut. The shank is centerlessly ground before thread rolling, ensuring the thread-shank coaxiality is ≤0.05mm, reducing eccentric loads under dynamic conditions.

Corrosion Resistance Solutions: For snowy and coastal environments, zinc-aluminum coatings (Dacromet/Gumite), zinc-nickel alloy plating, or mechanical galvanizing are available. Combined with wax sealing or topcoat, salt spray testing can reach 500~1000 hours.