Cargo Crane Slewing Bearings - Deck Machinery and Hull Equipment
Large-diameter slewing bearings support and rotate marine cargo crane superstructures while transmitting axial, radial, and overturning-moment loads. They are commonly supplied with internal or external gearing, seals, mounting holes, and grease lubrication.
ProShipWorks provides end-to-end support to source and supply Cargo Crane Slewing Bearings for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Cargo Crane Slewing Bearings |
|---|---|
| Product Category | Deck Machinery and Hull Equipment |
| Product Reference | 398 |
| Brands / Manufacturers | Rothe Erde, Rollix, IMO |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Combined axial, radial, and overturning-moment load capacity |
| 2. Four-point contact ball or roller bearing construction |
| 3. Available with internal, external, or no gear |
| 4. Sealed raceways with grease lubrication points |
| 5. Corrosion-protected versions available for marine environments |
Applications of Cargo Crane Slewing Bearings
| Application |
|---|
| 1. Shipboard cargo crane slewing systems |
| 2. Offshore and deck crane rotating pedestals |
| 3. Grab, hose-handling, and provision crane assemblies |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| KD 320 series | thyssenkrupp rothe erde Germany GmbH |
| Series 01 four-point contact ball slewing ring | Rollix-Defontaine |
| WD series ball slewing ring | IMO GmbH & Co. KG |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| KD 320 series | Bearing configuration | Single-row four-point contact ball bearing | — |
| Series 01 four-point contact ball slewing ring | Gear arrangement | Internal gear, external gear, or ungeared depending on selected variant | — |
| WD series ball slewing ring | Principal load capability | Combined axial, radial, and tilting-moment loads | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Design selection may reference ISO 281 and ISO 76 for bearing ratings, ISO 4301-1 for crane classification, ISO 8686-1 and EN 13001 for crane loads and design. Applicable material, welding, coating, and inspection requirements depend on the crane specification and flag or class rules. |
|---|---|
| Class Approval | Approval is normally project-specific as part of the complete crane or lifting appliance. Relevant societies include DNV, ABS, Lloyd's Register, Bureau Veritas, and ClassNK. Typical rules include DNV-ST-0377 and each society's lifting-appliance requirements; individual bearings are not automatically class-approved. |
Installation, Maintenance & Safety Information
| Installation Notes | Confirm the bearing part number, gear geometry, bolt grade, backlash, mounting-face flatness, and crane OEM orientation. Clean and support both mounting faces, use the specified tightening sequence and torque or bolt-tension method, then verify free rotation and gear mesh. |
|---|---|
| Maintenance Tips | Lubricate raceways and gear teeth at the crane OEM intervals, using an approved marine grease. Inspect seals, mounting bolts, gear wear, corrosion, grease leakage, abnormal noise, backlash, and bearing clearance. Record wear measurements and rotate the crane during greasing. |
| Safety Notes | Isolate and secure the crane against rotation before work. Support the rotating structure during bearing replacement, follow approved lifting and bolting procedures, and never reuse fasteners unless permitted by the OEM. Excessive clearance, cracked bolts, damaged raceways, or abnormal noise requires immediate engineering assessment. |
Request a Quote for Cargo Crane Slewing Bearings
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- Vessel name and IMO number
- ETA / vessel schedule
- Berth or vessel location
- Required quantity
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