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Construction vehicle wheel hub support shafts are crucial components used in driving axles on construction vehicles such as road rollers, excavators, and loaders. Welded at both ends of the axle housing, they connect the drive axle housing to the internal gear ring, with half-axles passing through the axle tubes. These parts must not only bear the weight of the vehicle but also withstand the impact and counter-impact forces from the road surface during operation. Therefore, high mechanical performance is required, particularly in terms of stiffness, wear resistance, and seismic resistance, making them essential safety components for construction vehicles. The technical specifications for this product are as follows: 1. Fatigue bench testing must exceed 500,000 cycles; 2. Heat treatment hardness: 24-32 HRC; 3. Metal flow lines: Full fiber metal flow lines distributed al...