XSI140944N Crossed Roller Slewing Ring, Standard Series 14, Internal Teeth
The XSI140944N 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 XSI140944N bearing is a Crossed roller bearing, slewing ring standard series 14, internal teeth with an inner diameter of 840 mm , an outer diameter of 1014 mm, a width of 56 mm. It typically uses P5, P6, P0 grade precision tolerances and 50Mn,42CrMo rings, GCr15 rolling mlement. It primarily bears axial, radial and tilting moment loads, Its dynamic radial rated load is approximately 223000 N, its static radial rated load is approximately 610000 N. Its dynamic axial rated load is approximately 315000 N, its static axial rated load is approximately 1240000 N. lip seals on both sides type, NBR (Nitrile Butadiene Rubber). together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: XSI140944-N
XSI140944N bearings ( 840 mm x 1014 mm x 56 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 | XSI140944N |
| Bearing Type | Crossed roller bearing, slewing ring standard series 14, internal teeth |
| Series | XSI14 |
| Equivalent | XSI140944-N |
| Interchangeable | INA XSI140944N |
| Load direction | axial, radial and tilting moment loads |
| Lubrication nipples | 4 taper type lubrication nipples, DIN 71412-A M8x1,arranged evenly about the circumference |
| Seal type | lip seals on both sides |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Rows NO. | One |
| m Weight [kg] | 74.1 |
| Performance Data | |
| Ca Dynamic Axial | 315000 N | 315.000 KN |
| C0a Static Axial | 1240000 N | 1240.000 KN |
| Cr Radial Dynamic | 223000 N | 223.000 KN |
| C0r Radial Static | 610000 N | 610.000 KN |
| Operating temperature - T(min) [°C] | -25 |
| Operating temperature - T(max) [°C] | 80 |
| Dimensions | |
| Da Φ Outside Diameter [mm] | 1014 |
| Da Tolerance [mm] | -IT7 |
| DaZT Centring outer ring [mm] | 1014 |
| di φ Bore Diameter [mm] | 840 |
| Di Inner diameter outer ring [mm] | 945 |
| Di Tolerance [mm] | +0.7 |
| da Outside diameter inner ring [mm] | 941 |
| da Tolerance [mm] | -IT7 |
| Height - H [mm] | 56 |
| T Length centering inner ring [mm] | 10 |
| t Length centering inner ring [mm] | 4.5 |
| ha Width outer ring [mm] | 44.5 |
| Fixing holes | |
| La Pitchcircle diameter fixing holes outer ring [mm] | 990 |
| na Number of fixing holes in outer ring | 44 |
| Li Pitchcircle diameter fixing holes inner ring [mm] | 905 |
| ni Number of fixing holes in inner ring | 44 |
| dB Fixing bore [mm] | 14 |
| Fr zul Max Radial load fixing screws | 181700 N | 181.700 KN |
| tG Thread depth [mm] | 20 |
| Gearing | |
| Gearing type | N = Normalized gear teeth on bearing ring |
| Gear teeth type | internal |
| Gear rings material | C45N or 42CrMo4V65 (suffix N) |
| b Width gearing [mm] | 44.5 |
| d0 Pitch circle diameter gearing [mm] | 856 |
| m Module of gearing [mm] | 8 |
| z Number of teeth | 107 |
| Fz norm Tooth force | 31400 N | 31.400 KN |
| Fz max Tooth force | 46700 N | 46.700 KN |
| Designation Breakdown | |
| VSP min preload [mm] | 0.01 |
| VSP max preload [mm] | 0.05 |
The XSI140944N 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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