Hebei YuanZheng Axle Co., Ltd. is a professional manufacturer of semi-trailer parts, which is located in Gucheng Industrial Zone, Longyao county, Xingtai City, Hebei Province China, covering an area of 30, 000 square meters. Its main products cover: German type axles, American type axles and other accessories. The one-piece Wangqiao axle is made of steel tube special for trailer axle and formed by hot extrusion technology, which incorporates the advantage of hot spinning into our military technology. This kind of technology can ensure the metal deforms in the axle direction. After further quenching, tempering, and hardening, strength, rigidity and fatigue life of the axle beam can be greatly improved. Our technology greatly reduces the risk of axle fatigue fracture which can be caused by metal bending and deformation when spinning.