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Cross cylindrical roller slewing bearing

 Cross cylindrical roller slewing bearing
For No Gear Type 
Inner Diameter: 320-4272mm 
Outer Diameter: 550-4726mm 
Weight: 85.6-3100kg 
For Internal Gears Type 
Inner Diameter: 398-4272mm 
Outer Diameter: 602-4726mm 
Weight: 80-3100kg 
For External gear type 
Inner Diameter: 398-4272mm 
Outer Diameter: 602-4726mm 
Weight: 80-3100kg
     Cross cylindrical roller slewing bearings main structural characteristics: 1:1 cross arrangement of cylindrical rollers.The bearing with this structure features high stability, high precision, and high impact resistance. For example, the cannon's rotary base uses this kind of bearing.
     Slewing bearins are large size bearings which can carry higher axial, radial laods and overturning moments at the same time, Slewing bearing generally have mounting holes, internal or external gears, lubricant holes and sealign equipment.
    Slewing bearings are widely used in cranes, excavation machines, construction machinery, port cargo handling machinery, large turnplates of high precision radars and missile launchers, etc.

    Slewing bearings are usually called slewing rings, slewing ring bearings,  laddle turret bearing,precision bearings,roller bearings swing bearings,slew bearings,turntable bearings and rotary bearings. With the cross roller Ring, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller, in a 90° groove, separated from each other by a spacer retainer.  This design allows just one bearing to receive loads in all directions including, radial, axial and moment loads. Since the Cross-Roller Ring achieves high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines.
it's has following features:
1. High precision: cross roller bearings can be made high precision bearings , at P4, P2.
2. High rigidity: These series roller bearings are with preload.
3. High load capacity: This series slewing ring bearings can support axial load, radial load, and tilting load.
4. Small volume: this series roller bearing  can save space for the machine.
Cross roller slewing rings are widely used on the precision rotary table, rotary joints of manipulators, medical equipment, and measuring instrument etc