... ,420x200,420x220mm(4) Spring seat installation : <=455mm (5) Axle beam : square 150 mm (6) PCD : 335, 285.75 mm (7) Bearing model ... : 518445/10 ,5188445/10,220149/10 AOTONG Axle processing technology advantages ... sure the whole beam be reliable .(6) AOTOG axle adopt no-asbestos brake materials , thus the axle is environmental and to improve the ...