VLI200744N ZT Four Point Contact Slewing Ring Light Series 20, Internal Gear Teeth
The VLI200744N ZT Flanged-type slewing bearings are widely used in Scenarios that require equipment weight, installation space, and rotational flexibility, but have medium or low load-bearing requirements, such as industrial robots (wrist joints), machine tools (tool magazines, turntables), automated equipment (robotic arms), medical equipment (surgical robots), packaging equipment, and aerospace (antenna drive mechanisms), among other fields.
The VLI200744N ZT bearing is a Four point contact bearing, slewing ring light series 20, internal gear teeth with an inner diameter of 648 mm , an outer diameter of 846 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 155000 N, its static radial rated load is approximately 197000 N. Its dynamic axial rated load is approximately 171000 N, its static axial rated load is approximately 530000 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: VLI200744-N-ZT
VLI200744N ZT bearings ( 648 mm x 846 mm x 56 mm) have the advantages of Lightweight, compact, flexible in operation, with good load-bearing capacity, and easy to install, and are therefore widely used in the Industrial robots, medical equipment (CT scanner), packaging machinery.
| Part Number | VLI200744N ZT |
| Bearing Type | Four point contact bearing, slewing ring light series 20, internal gear teeth |
| Series | VLI20 |
| Equivalent | VLI200744-N-ZT |
| Interchangeable | INA VLI200744N ZT |
| Load direction | axial, radial and tilting moment loads |
| Lubrication nipples | 4 taper type lubrication nipples, DIN 71412-A S8x1, arranged evenly about the circumference, uniform |
| Seal type | lip seals on both sides |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Rows NO. | One |
| m Weight [kg] | 51.5 |
| Performance Data | |
| Ca Dynamic Axial | 171000 N | 171.000 KN |
| C0a Static Axial | 530000 N | 530.000 KN |
| Cr Radial Dynamic | 155000 N | 155.000 KN |
| C0r Radial Static | 197000 N | 197.000 KN |
| Operating temperature - T(min) [°C] | -25 |
| Operating temperature - T(max) [°C] | 80 |
| Dimensions | |
| d1 φ Inside Diameter [mm] | 648 |
| Da Φ Outside Diameter [mm] | 848 |
| Da Tolerance [mm] | -0.6 |
| DaZT Centring outer ring [mm] | 846 |
| DaZT Tolerance [mm] | -IT8 |
| di φ Bore Diameter [mm] | 648 |
| Di Inner diameter outer ring [mm] | 745.5 |
| Di Tolerance [mm] | +0.6 |
| da Outside diameter inner ring [mm] | 742.5 |
| da Tolerance [mm] | -0.6 |
| daZT Diameter centring inner ring [mm] | 741 |
| daZT Tolerance [mm] | -IT8 |
| Height - H [mm] | 56 |
| T Length centering inner ring [mm] | 4.4 |
| ha Width outer ring [mm] | 44.5 |
| hA Ring cross section [mm] | 20 |
| hf Height of flange [mm] | 12 |
| hi Height of inner ring [mm] | 44.5 |
| Fixing holes | |
| La Pitchcircle diameter fixing holes outer ring [mm] | 820 |
| na Number of fixing holes in outer ring | 12 |
| Li Pitchcircle diameter fixing holes inner ring [mm] | 705 |
| ni Number of fixing holes in inner ring | 20 |
| dB Fixing bore [mm] | 18 |
| Fr zul Max Radial load fixing screws | 82600 N | 82.600 KN |
| dBi Tread fixing bore | M12 |
| Gl Thread depth fixing hole [mm] | 20 |
| Gearing | |
| Gearing type | N = Normalized gear teeth on bearing ring |
| Gear teeth type | internal |
| Gear rings material | C45N or 42CrMo4V65 (suffix N) |
| d0 Pitch circle diameter gearing [mm] | 660 |
| m Module of gearing [mm] | 6 |
| z Number of teeth | 110 |
| Fz norm Tooth force | 23700 N | 23.700 KN |
| Fz max Tooth force | 35000 N | 35.000 KN |
| Designation Breakdown | |
| Centering | ZT = Centering on inner and outer ring |
| Radial internal clearance | Standard_VL = Standard radial clearance 0 to 0.5 and axial tilting clearance 0 to 0.7 |
The VLI200744N ZT Flange-type slewing bearings mainly consist of an inner or outer ring with a flange, another ring, rolling elements (steel balls or rollers), spacers, and sealing devices. The flange rings have mounting holes for direct bolt connection.
The flange structure of flange-type slewing bearings simplifies the installation process, eliminating the need for additional mounting seats, resulting in convenient assembly and precise positioning. They offer high overall rigidity, capable of simultaneously withstanding axial loads, radial loads, and overturning moments, while their compact structure saves space.
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