SEG SeriesSlewing bearing

SEG Series Slewing bearing

SEG Series Slewing bearing

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



  • SEG Series Slewing bearing
  • SEG Series Slewing bearing
  • SEG Series Slewing bearing
  • SEG Series Slewing bearing
  • SEG Series Slewing bearing
  • SEG Series Slewing bearing
  • SEG Series Slewing bearing
InquiryTypeBrandDrawing No.Outer Ring DimensionsOuter HolesInner HolesGear DataWeightRelated Types
Da[mm]Di[mm]Height[mm]U[mm]C[mm]Ua f9[mm]di H9[mm]La[mm]naφaLi[mm]niφiP[mm]ModuleZFzMax kNKG

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.

Performance Highlights

  • 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







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