... shaft 1.material:steel 2.Surface treatment Carburizing, hardening and tempering, nitriding, heavy duty truck gearbox main shaft Detailed Product Description ISO/TS ... -90, S6-100, S6-150/QJ1506, S6-160, QJ705, QJ805 and all of their spare parts.We supply transmission gearbox parts ... Long, Yaxing, Ankai(AK), JAC, Zonda, Daewoo, Neoplan, Kaisiboaer, etc. heavy duty truck gearbox main shaft