We are capable to design and produce any kinds of slewing bearings sized over than 4500 mm, especially the various kinds of the no-gear, internal gear and external gear four-point-contact ball bearings in any tolerance classes, the double-row thrust angular contact trust ball bearings, the three-row composed cylindrical roller bearings, the cross cylindrical roller bearings and the other series of slewing bearings etc. They are widely used in the fields of ports, metallurgy, mine, food, coal, cement, wind-power generation, engineering mechanism and etc.