CHARACTERISTIC OF STRUCTURE，PERFORMANCE AND APPLICATION
　　 The single-row four piont contact ball slewing ring is composed of two seat-rings.It features compact in design,light in weight,the balls contact with the circular raceway at four points,via which the axial force,radial force and resultant moment may be born simultaneously.It may be used for slewing conveyers,welding operating consoles,light,medium duty cranes,excavators and other engineering machines.

   Crossover rolling type(HJ series)

CHARACTERISTIC OF STRUCTURE，PERFORMANCE AND APPLICATION
　　 The single-row four piont contact ball slewing ring is composed of two seat-rings.It features compact in design,light in weight,the balls contact with the circular raceway at four points,via which the axial force,radial force and resultant moment may be born simultaneously.It may be used for slewing conveyers,welding operating consoles,light,medium duty cranes,excavators and other engineering machines.

   Single-row spherical type(QU QW QN series)

CHARACTERISTIC OF STRUCTURE，PERFORMANCE AND APPLICATION
　　 The single-row four piont contact ball slewing ring is composed of two seat-rings.It features compact in design,light in weight,the balls contact with the circular raceway at four points,via which the axial force,radial force and resultant moment may be born simultaneously.It may be used for slewing conveyers,welding operating consoles,light,medium duty cranes,excavators and other engineering machines.

   Three-row rolling type(13 series )

CHARACTERISTIC OF STRUCTURE，PERFORMANCE AND APPLICATION
　　 Three-row roller slewing bearing has three seat-rings,which separate the upper,lower and radial races,via which the load of each row of the rollers may be specified.It may bear different loads simultaneously and its load capacity is the largest one among the four models.
　　 Thanks to the large size of its axle and radius,it is sturdy and especially suitable for hearvy-duty machines which require large working radius.such as bucket-wheel excavators,wheeled cranes,ship cranes,ladle turret,heavyduty mobile cranes etc.

    Double-row spherical type(02 series)

CHARACTERISTIC OF STRUCTURE，PERFORMANCE AND APPLICATION
　　 The double-row Ball slewing beraring 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°,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.

    Crossover rolling type(11 series)

CHARACTERISTIC OF STRUCTURE，PERFORMANCE AND APPLICATION
　　 The single-row crossed roller slewing ring is composed of two seat-rings.It features compact in design,light in weight,high precision and small fitting clearance.
　　 As the rollers are 1:1cross aranged,it is suitable for high precision mounting and capable to bear axial force,rsultant moment and considerable large radial force.
　　 The single-row crossed roller slewing rings are widely used for hoisting,transporting,engineering machines as well as for military products.