The SEG series is a single-row, four-point contact ball slewing bearing featuring an external gear on the outer ring. This series is part of Luoyang MC Bearing's specialized product range and is designed for applications that require compact dimensions, combined load capacity, and reliable performance in a variety of operating conditions.
Typical Applications:
Construction machinery such as cranes and excavators
Aerial work platforms and man lifts
Solar tracking systems
Radar and antenna positioning systems
Materials handling and conveying equipment







| Inquiry | Type | Brand | Drawing No. | Outer Ring Dimensions | Outer Holes | Inner Holes | Gear Data | Weight | Related Types | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Da[mm] | Di[mm] | Height[mm] | U[mm] | C[mm] | Ua f9[mm] | di H9[mm] | La[mm] | na | φa | Li[mm] | ni | φi | P[mm] | Module | Z | FzMax kN | KG | |||||
The SEG series bearing consists of an inner ring, an outer ring with integral external teeth, and a single row of steel balls with spacers. The raceways are precision-machined so that each ball maintains contact with the raceways at four distinct points, enabling the bearing to simultaneously support axial loads (in both directions), radial loads, and tilting moments within a single row of rolling elements.
The external gear is machined directly on the outer ring, allowing direct pinion drive coupling without the need for a separate gear ring. This simplifies the transmission system and reduces overall component count. Both rings are provided with mounting holes for straightforward bolted installation, making connection between adjacent machine components simple and efficient.
Combined load capability: Handles axial, radial, and moment loads simultaneously
Compact and lightweight: Single-row design saves space and reduces structural weight
Smooth rotation: Optimized raceway geometry and high-quality surface finish provide stable operation under load
Easy integration: External gear and mounting holes simplify system assembly
Sealing options: Available with various sealing configurations to suit different environmental conditions





