main products covers: German type axles, American type axles, Bogie suspensions, mechanical suspensions and related parts. The one-piece TND axle is made of seamless steel tube and formed by hot extrusion technology, which takes the advantage of incorporating hot spinning and 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 can reduce the risk of axle fatigue fracture which can be caused by metal bending and deformation when spinning.