RKS.21 0411
  • RKS.21 0411 light series four point contact bearings
  • RKS.21 0411 slewing bearing structure
  • Part NO.

    Open type:RKS.21 0411

  • Dimension






  • Mounting

  • Basic Load Ratings



  • Equivalent Model


  • Features
  • Mounting
  • RKS.21 0411 detail specifications:

    Rolling Elements Ball
    Space retainer Yes
    Material GCr15 Bearing steel / 50Mn
    Standard lubrication method Grease lubrication
    Lubrication hole Yes
    Sealing NBR sealing at both sides
    Raceway Hardness HRC 55 ~ 60
    Working temperature -20℃ ~ 40℃


    RKS.21 0411 light series four point contact ball bearings features:

    1. Provide exceptional moment, thrust, and radial load capacities

    2. Thin and fixed cross section, irrespective of the inner or outer diameter

    3. Easy installation, with mounting holes on both inner and outer ring

    4. Cost-effective for light to medium-duty arrangements which do not require high precision, such as aerial work platforms, turntables, handling equipment, robots, wastewater treatment equipments.




  • RKS.21 0411 slewing bearing installation instructions


    VLU200414 slewing ring mounting instruction

    1. Make sure the mounting surface is flat and clean, and free from burrs or

    rough edge.


    2. The unhardened zone is marked with an “S” on the slewing ring, it must be positioned outside the main load-carrying areas.


    3. Commissioning of the slewing ring under sufficient load.

    slewing ring bolts fastening order


    4. Adjust the backlash of gear and recheck it after final tightening of the bearing.


    5. Fastening bolts. Place the bearing onto connecting structure and align the screw holes. Screw all the bolts in the holes first and follow the order as shown in diagram when tightening bolts in diagonally opposite sequence. Do not tighten bolts randomly.


    6. Check the installation by rotating the assembled bearing arrangement. The torque should not show any excessive variation or “tight spots” during rotation.





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