can offer such series of slewing bearings with high quality and favorable price. The axial&radial size of this kind of Slewing Ring all are rather big and the structure is firm, so it is especially suitable for some Loading&Unloading Machines of over-medium diameter, such as, Tower Crane, Truck crane, and so on. Special slewing bearings according to the customers’ requirements can be made in our factory. Please don’t hesitate to contact us if you have need of such series slewing bearings! We will provide you the best service. skype:zhanghong8600