External gear E.20.B E.25.B series

External gear E.20.B E.25.B series

External gear E.20.B E.25.B series

The E series is a single-row, four-point contact ball slewing bearing featuring an external gear on the outer ring. This series is part of standard product offering and is designed for light to medium-duty applications that require compact dimensions, combined load support, and straightforward integration.


Typical Applications:

Construction machinery such as cranes and excavators

Aerial work platforms and man lifts

Solar tracking systems

Materials handling equipment

Industrial turntables and positioning systems



  • External gear E.20.B E.25.B series
  • External gear E.20.B E.25.B series
  • External gear E.20.B E.25.B series
  • External gear E.20.B E.25.B series
  • External gear E.20.B E.25.B series
  • External gear E.20.B E.25.B series
InquiryBearing TypeBrandDrawing No.DimensionsFixing HolesGear TeethTooth ForceMass
Da(mm)O(mm)u(mm)C(mm)Di(mm)Ha(mm)Hb(mm)H(mm)La(mm)nada(mm)Li (mm)ni di(mm)P(mm)MZFz nor KNFz max KNWeight (KG)

The E 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 machined so that each ball maintains contact with the raceways at four distinct points, allowing 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, enabling 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.

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 provides stable operation under load

  • Easy integration: External gear and mounting holes simplify system assembly


Drawing 1.png

Drawing 2.png

Drawing 3.png


Drawing 4.png

Drawing 5.png