... steel 3)DIN,EN,JB standard 4)Mechanical properties Technical Data:National standards: Ο GB/T6402-91 Ο JB4730-2000 Ο JB ... innovation. Our company always insists "strengthen management, win by quality, satisfy the needs of customers, gain satisfaction by faithfulness" ... you in every respect of ent. production quality, after-sale service and management. High quality Forged Rotor Spindle Axle (fan shaft)