RKS 061.20.1094 slewing bearing

RKS 061.20.1094 Slewing Bearing – High-Capacity External Gear Solution for Heavy-Duty Rotating Systems

The RKS 061.20.1094 Slewing Bearing is a single-row four-point contact ball bearing with external gear configuration, engineered to deliver simultaneous axial, radial, and moment load capacity in compact installations. Manufactured to SKF/Rothe Erde dimensional standards (variant number 061.20.1094.500.01.1503), this bearing features a 1094 mm pitch circle diameter, 1198.4 mm outer diameter, 1022 mm inner diameter, and 56 mm total height. With an axial static load rating of 2710 kN and dynamic rating of 303 kN, it supports demanding operations in 35–60 ton excavators, portal cranes, and 1.5–2.5 MW wind turbine yaw systems, where space constraints and rigorous load cycles dictate design.

Technical Specifications

Mounting Bolt Holes

Gear Parameters (SKF Official Specification)

Note: Gear tooth forces calculated for 3,000,000 operating cycles per SKF catalogue.

Load Performance

Materials and Manufacturing Process

Forged 42CrMo4 or 50Mn alloy steel rings undergo quenching and tempering to achieve HB 229–269 core hardness. Raceways receive induction hardening to HRC 55–62 with a case depth of at least 4.0 mm, ensuring wear resistance and fatigue strength. GCr15 balls are hardened to HRC 60–64. Double-lip NBR seals provide contamination protection in standard environments; FKM seals extend performance to extreme temperatures. NLGI #2 lithium-based grease is factory-applied and can be customized for specialized conditions such as heavy dust, extreme cold, or high humidity.

Industry Applications

Heavy Construction Excavator

The external gear on this heavy excavator slewing ring and crawler crane slewing bearing enables direct connection to hydraulic slewing motors. Its four-point contact swing bearing structure simultaneously handles the axial lifting force and the tilting moment from the boom. The 2710 kN static load rating supports high-tonnage boom assemblies in 35–60 ton excavators and large crawler cranes.

Mining Equipment

As a stacker reclaimer slewing bearing, mining excavator swing bearing, and mining turntable, this unit is designed for heavy dust environments. Dual-lip seals and grease replenishment passages enable round-the-clock continuous operation in rotary crushers and bucket-wheel excavators, where abrasive particles and shock loads are constant.

Port Excavator

The RKS 061.20.1094 slewing bearing, deployed as a portal crane slewing ring, ship unloader bearing, and harbor crane turntable, operates under low-speed, high-load conditions in all-weather port environments. Optional zinc thermal spray coatings enhance corrosion resistance for seaside installations, while the compact 56 mm height allows integration into space-constrained pedestal bases.

Wind Energy

In wind turbine yaw bearing and yaw slewing ring applications for 1.5–2.5 MW turbines, the bearing provides precise yaw positioning with low starting torque. The r7 raceway load curve and controlled clearances minimize clearance, ensuring accurate nacelle alignment and resistance to alternating wind loads.

Offshore and Marine

For offshore crane slewing bearing, marine deck crane, and winch turntable installations, salt spray corrosion protection is achieved through optional zinc spray or nickel plating. FKM seal upgrades extend service life in marine environments where temperature fluctuations and saltwater exposure are routine.

Amusement Rides

The ferris wheel slewing bearing and amusement ride bearing configuration meets passenger-carrying safety standards with a safety factor ≥ 1.45. Dual sealing and traceable magnetic particle inspection reports provide compliance documentation for ride certification authorities.

Industrial Equipment

As a heavy welding positioner bearing and rotary table bearing, the 56 mm low-profile design and module-8 external gear allow direct coupling to reducers in large welding positioners and heavy-duty rotary tables, eliminating intermediate gearboxes and reducing system complexity.

Special Vehicles

In aerial platform slewing bearing and boom lift slewing systems for large fire ladder trucks and heavy aerial work platforms, the compact footprint and lightweight design meet tight space requirements.

Defense and Communication

For radar antenna slewing bearing and missile launcher turntable installations, low clearance and smooth rotation are critical. Precision classes up to P5 are available to meet stringent positioning and stability requirements in tactical systems.

Lifting and Transportation

In truck crane slewing ring and crawler crane turntable bearing roles, 92 high-strength mounting bolts (44 outer ring M12, 48 inner ring φ13.5 clearance holes) ensure robust connection and enable rapid field replacement of SKF original components without machine redesign.

Certification

FAQ

Q: Is 061.20.1094 a direct replacement for SKF RKS.061.20.1094 or Rothe Erde?

A: Yes. We manufacture to identical mounting dimensions (dm 1094 mm, OD 1198.4 mm, ID 1022 mm, H 56 mm, bolt circles 1135/1048 mm, M12×44 / φ13.5×48). No structural modification needed.

Q: What is the load capacity?

A: Axial dynamic rating C=303 kN, static C₀=2710 kN, with raceway curve r7 and bolt curve b7. Permissible gear tooth force: 21 kN normal / 72 kN maximum.

Q: What gear specifications does RKS.061.20.1094 have?

A: External gear, module 8, 148 teeth, reference circle 1184 mm, addendum modification -0.8, face width 45.5 mm, 20° pressure angle, ISO 1328 Grade 9.

Q: Which applications use this bearing size?

A: 35–60 ton excavators, crawler cranes, portal cranes, 1.5–2.5 MW wind turbine yaw systems, offshore deck cranes, and ferris wheels.

Contact Us

Need dimensional drawings, material certificates, or technical support for your RKS 061.20.1094 slewing bearing project? Confirm compatibility, request samples, or discuss custom bolt patterns and sealing options—reach our engineering team at mia@hgb-bearing.com to start your inquiry today.