XU050077-RR Crossed Roller Slewing Ring Bearing, Without Gear Teeth, Preloaded
The XU050077-RR Crossed roller slewing bearings are widely used in requiring high levels of rotational accuracy, rigidity, and load-bearing capacity, where installation space is often limited，such as industrial robots (joints, rotary seats), CNC machine tools (rotary tables, turrets), medical equipment (CT scanners, surgical robots), precision measuring instruments, radar turntables, and aerospace applications.
The XU050077-RR bearing is a Crossed roller slewing ring bearing, without gear teeth, preloaded with an inner diameter of 40 mm , an outer diameter of 112 mm, a width of 22 mm. It typically uses P5, P6, P0 grade precision tolerances and 50Mn,42CrMo rings, GCr15 rolling mlement. It primarily bears high radial forces and moderate axial and tilting moment loads, Its dynamic radial rated load is approximately 14000 N, its static radial rated load is approximately 22700 N. Its dynamic axial rated load is approximately 19600 N, its static axial rated load is approximately 46000 N. sealed on both sides type, NBR (Nitrile Butadiene Rubber). together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
XU050077-RR bearings ( 40 mm x 112 mm x 22 mm) have the advantages of The rollers are arranged in a cross pattern, resulting in minimal deformation, low rotational runout, and precise positioning, and are therefore widely used in the Industrial robots, machine tool rotary tables, medical devices, radar antennas and precision rotating equipment.
| Part Number | XU050077-RR |
| Bearing Type | Crossed roller slewing ring bearing, without gear teeth, preloaded |
| Series | XU |
| Interchangeable | INA XU050077-RR |
| Load direction | high radial forces and moderate axial and tilting moment loads |
| Seal type | sealed on both sides |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Rows NO. | One |
| m Weight [kg] | 1.207 |
| Performance Data | |
| Ca Dynamic Axial | 19600 N | 19.600 KN |
| C0a Static Axial | 46000 N | 46.000 KN |
| Cr Radial Dynamic | 14000 N | 14.000 KN |
| C0r Radial Static | 22700 N | 22.700 KN |
| Operating temperature - T(min) [°C] | -30 |
| Operating temperature - T(max) [°C] | 80 |
| Dimensions | |
| Da Φ Outside Diameter [mm] | 112 |
| di φ Bore Diameter [mm] | 40 |
| Di Inner diameter outer ring [mm] | 77.5 |
| da Outside diameter inner ring [mm] | 74 |
| Height - H [mm] | 22 |
| h Height of individual ring [mm] | 21 |
| t Length centering inner ring [mm] | 10 |
| ha Width outer ring [mm] | 21 |
| Fixing holes | |
| La Pitchcircle diameter fixing holes outer ring [mm] | 97 |
| na Number of fixing holes in outer ring | 6 |
| Li Pitchcircle diameter fixing holes inner ring [mm] | 56 |
| ni Number of fixing holes in inner ring | 6 |
| dB Fixing bore [mm] | 6.6 |
| dS Counterbore diameter of fixing holes [mm] | 11 |
| tS Counterbore depth of fixing holes [mm] | 5.5 |
| Fr zu. Max Radial load screws | 5800 N | 5.800 KN |
| tG Thread depth [mm] | 13 |
| Gearing | |
| Gear teeth type | without |
| Designation Breakdown | |
| Coating | RR = Corrosion-resistant design |
| VSP min preload [mm] | 0.005 |
| VSP max preload [mm] | 0.008 |
The XU050077-RR Crossed roller slewing bearings mainly consist of an inner ring, an outer ring, cross-arranged cylindrical rollers, spacers, and a sealing device. The rollers are arranged at 90° intervals within the raceway, enabling a single-row structure to withstand multi-directional loads.
The cross-arrangement of the rollers in crossed roller slewing bearings allows them to simultaneously withstand radial loads, axial loads, and overturning moments. They exhibit extremely high rigidity and a precision grade of P5 or higher. Their compact structure and easy installation significantly save installation space.
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