Bearings Name	New Model	Old Model:	ID(mm)	OD(mm)	Width(mm)	Cr(kN)	Cor(kN)	Grease Lubrication Speed(r/min)	Oil Lubrication Speed(r/min)	Weight(kg)
slewing bearing for marine crane	013.45.1600	-	1460	1740	110	-	-	-	-	550.000

marine crane Slewing Bearing – Reliable Rotation in Harsh Offshore Environments

A Marine Crane Slewing Bearing is a heavy‑duty rotational component engineered to sustain axial, radial, and tipping moment loads under corrosive and dynamic sea conditions.
It forms the central pivot of offshore and shipboard cranes, enabling smooth and precise rotation between the crane’s superstructure and pedestal base.

As a marine‑grade slewing bearing manufacturer, we specialize in designing and producing bearings that maintain stable performance in saltwater, high humidity, and variable temperature environments.
Our marine crane slewing rings are built for long service life, high safety factors, and dependable torque transmission — essential for port, deck, and offshore lifting operations.

Durable, precise, and corrosion‑resistant — engineered for the sea.

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2. Key Features & Advantages

• ⚙️ High Load Capacity
  Designed to handle combined heavy axial and radial loads with continuous rotational torque.

• 🌊 Marine‑Grade Anti‑Corrosion Protection
  Coated with nickel plating, phosphate treatment, or marine epoxy paint, combined with sealed raceways to prevent seawater ingress.

• 🚢 Strong Structural Integrity
  Forged from 42CrMo or 50Mn steel, heat‑treated and quenched for strength and wear resistance.

• 🧱 Robust Sealing System
  Multi‑lip, double‑sealed design stops water, dust, and debris, ensuring reliable operation in harsh weather.

• 🧠 Precision Gear Teeth
  External or internal gear option for accurate and quiet rotation; gear hardness maintained at 45 – 55 HRC.

• ⚡ Stable Performance Under Dynamic Load
  Finite‑element design ensures smooth operation under ship movement, wind load, and impact forces.

• 🧰 Custom Design Available
  Fully tailored diameters, gear modules, mounting holes, and corrosion protection — per vessel or crane type.

Designed for long‑term duty in marine service, combining strength, protection, and precision.

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3. Typical Specifications

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4. Structural Options for Marine Cranes

1. Single‑Row Four‑Point Contact Ball Slewing Bearing
   Compact, cost‑effective, and suitable for medium‑capacity deck cranes.

2. Double‑Row Ball Slewing Bearing
   High load‑bearing capability for heavy‑duty offshore cranes.

3. Cross‑Roller slewing bearing
   Offers increased rotational rigidness and precision under high overturning moments.

4. Triple‑Row Roller Slewing Bearing
   Maximum load capacity and long service life for offshore lifting platforms and FPSO cranes.

5. Gearless Version
   Ideal for direct‑drive or hydraulic slewing systems requiring sealed and enclosed rotation.

Each bearing structure is carefully selected according to load case, installation space, and environmental exposure.

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5. Marine‑Grade Protection

Our bearings undergo special corrosion‑resistant treatment and sealing technology for extreme sea applications:

• 🧴 Surface Finishing – Epoxy paint or nickel‑chrome plating up to 80 µm thickness.
• 🧬 Sealing System – Nitrile rubber multi‑lip seals for saltwater resistance.
• 🧊 Grease – Water‑repellent lithium complex or calcium sulfonate marine grease.
• ⚙️ Coating on Fasteners – Hot‑dip galvanized or zinc‑nickel bolts per ISO 898‑1.
• 🧠 Optional Stainless Steel Rings for low‑maintenance solutions in fully exposed installations.

Every component is engineered to resist corrosion, vibration, and fatigue in marine service environments.

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6. Applications

Our Marine Crane Slewing Bearings are used in:

• Offshore pedestal and knuckle‑boom cranes
• Ship deck cranes and davits
• Port and harbor lifting equipment
• FPSO and jack‑up platform cranes
• Dredging and pipe‑laying cranes
• Floating dock and barge cranes

Also suitable for other offshore rotating equipment such as marine winches, subsea manipulators, and turntables.

Proven performance in both new builds and retrofit replacements on vessels worldwide.

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7. Quality & Testing

Each bearing is produced following ISO/CCS/BV marine standards, ensuring reliable service life at sea:

• Ultrasonic & magnetic particle inspection of forgings
• Induction‑hardening and heat‑treatment uniformity test
• Gear profile and hardness verification
• Rotary performance and torque testing
• Salt‑spray corrosion resistance test
• Dimensional and CMM inspection with full QC report

Comprehensive testing ensures the bearing performs flawlessly from dock to deep sea.

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8. Customization & OEM Options

We provide full customization for shipbuilders and crane OEMs:

• Adjusted gear module and pitch circle
• Modified bolt circle and flange mounting pattern
• Stainless steel or duplex steel material options
• Integration with hydraulic or electric slewing drives
• Replacement for Rothe Erde®, SKF®, IMO®, or Kaydon® models
• Tailored coating system based on DNV or ABS ship rules

Delivering tailor‑made bearings that integrate perfectly into your marine crane design.

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9. Why Choose Our Marine Slewing Bearings

• 🌍 Over 15 years of marine bearing manufacturing
• ⚙️ Independent forging, machining, and coating workshops
• 📜 Compliance with ISO, CCS, BV, ABS, and DNV standards
• 🧰 Professional engineering support and service team
• 🚀 Rapid delivery with optimized inventory and logistics
• 💰 Competitive factory‑direct pricing without compromising quality

Our expertise ensures your cranes stay operational — safe, efficient, and corrosion‑free.

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10. Summary

Our Marine Crane Slewing Bearings are trusted by global marine equipment builders for their strength, endurance, and resistance to harsh offshore conditions.
Every bearing is built with precise engineering, premium materials, and complete corrosion protection, ensuring smooth rotation and maximum uptime — year after year.

Engineered for the ocean. Built to last. Trusted worldwide.
Choose a reliable Chinese manufacturer for your next marine crane bearing project.