Slewing bearing originated in Germany 30 years ago ,then was used widely all around the word.Compared to the genernal bearings ,slewing bearings not only rotate but also bear the axial force ,radial force and resultant moment simultaneously .

The double-row Ball slewing bearing has three seat-rings.The steel balls and the spacers may be directly arranged into the upper and lower races.

Two rows of steel balls with different diameters are fitted according to the force bom. Such open mode fitting features extraordinary convenience.The load angles of both upper and lower races are 90 degree ,which enable the bearing to bear large axial force and the tipping moment. When the radial force is larger than 1/10 of the axail force the races should be newly designed.

As the axle and the dimension of the double-row ball slewing bearing are rather large,the bearing construction is sturdy ,hence it is especially suitable for tower cranes which require working radius over medium range,mobile cranes and loading and unloading machines.

We can produce both standard and non-standard from diameter 200mm to 5000mm slewing bearing. Xuzhou Xinda Slewing Bearing Co.,ltd has been the forefront of the design and manufacture of slewing turntable bearings (slewing bearings). Our slewing bearing co.,ltd is committed to meeting the demanding requirements of every industry and market.