Slewing Bearing For Marine Crane
2. Product Structure: Our slewing bearings utilize a single-row, four-point contact ball or cross-roller structure (selectable based on requirements and operating conditions).
3. Size Range: Raceway center diameter: From approximately 500 mm to over 5,000 mm
Cross-section height: Ranges from 10 mm to 400 mm.
4. Material: Ring material: High-strength 50Mn or 42CrMo alloy steel.
Rolling elements: High-precision, high-hardness GCr15 bearing steel balls.
Seals: Seawater-, ozone-, and aging-resistant NBR or higher-performance hydrogenated nitrile rubber (HNBR).
5. Applications: Marine deck cranes, mobile harbor cranes, offshore wind turbine installation vessel cranes, floating cranes (crane vessels), ship supply cranes, and offshore engineering platform cranes.
- Product Description
Slewing Bearing For Marine Crane
When you're operating marine cranes in demanding offshore environments, you need components that deliver consistent performance under extreme conditions. Our Slewing Bearing For Marine Crane is engineered specifically for these challenges. This high-precision rotational component integrates three critical functions—rotation, load bearing, and power transmission—into a single robust assembly. Designed to withstand saltwater corrosion, dynamic loads, and continuous operation, the product serves as the pivotal connection between your crane's rotating upper structure and its fixed base, ensuring reliable performance in deck cranes, harbor operations, and offshore platforms.
Product Details
Our marine crane slewing orientation highlight either single-row four-point contact ball or cross-roller setups, chosen based on your particular stack necessities and working conditions. The internal and external rings are made from high-strength 50Mn or 42CrMo combination steel, giving extraordinary basic keenness. Rolling components utilize GCr15 bearing steel for predominant hardness and wear resistance. Progressed fixing frameworks utilize NBR or HNBR materials that stand up to saltwater entrance, ozone debasement, and untimely aging.
The raceway plan permits concurrent transmission of pivotal, spiral, and minute loads through optimized contact points. This multi-directional stack capacity disposes of the require for numerous bearing gatherings, rearranging your crane structure whereas decreasing support focuses. Warm treatment forms make surface hardness of HRC 55-60 on equip teeth, whereas keeping up base fabric hardness at HB 260-300 for ideal toughness.
Why Choose Us?
Luoyang Heng Guan Bearing Innovation brings over 20 years of bearing building involvement to each marine application. Our 50-member specialized group centers particularly on slewing bearing advancement and fabricating, permitting us to get it the special challenges of marine environments.
We keep up ISO 9001 certification and guarantee all items meet RoHS compliance measures. Our generation office in Luoyang, China's bearing industry center, houses CNC vertical machines, exactness extinguishing frameworks, adapt shapers, and specialized pounding Gear. This permits us to control quality at each fabricating arrange, from crude fabric choice through last inspection.
You'll advantage from our adaptable customization capabilities. We handle breadth ranges from 50mm to 10,000mm and give exactness grades from P0 to P4. Our designing group offers specialized meeting, custom plan, establishment direction, and indeed invert designing for substitution parts when unique drawings aren't available.
Our items as of now serve clients over 50+ nations, counting Germany, the Joined together States, Norway, Australia, and all through the Center East. This worldwide reach reflects our commitment to assembly universal guidelines and client desires.



Technical Specifications
Parameter | Specification | Notes |
Diameter Range | 500mm – 5,000mm | Custom sizes available |
Cross-Section Height | 100mm – 400mm | Application dependent |
Precision Grade | P5 (standard) | P6, P4 available on request |
Axial Clearance | 0.03 – 0.05mm | Adjustable during assembly |
Radial Clearance | 0.03 – 0.05mm | Adjustable during assembly |
Gear Tooth Hardness | HRC 55-60 | Induction hardened |
Base Material Hardness | HB 260-300 | Quenched and tempered |
Ring Material | 50Mn / 42CrMo | High-strength alloy steel |
Rolling Elements | GCr15 bearing steel | Precision ground |
Seal Material | NBR / HNBR | Marine-grade elastomers |
Operating Temperature | -20°C to +80°C | Extended ranges available |
Certification

Features and Benefits
Coordinates Stack Dealing with: The four-point contact plan oversees pivotal pushed, spiral powers, and toppling minutes at the same time. This implies your crane works with less components and diminished basic complexity.
Corrosion Assurance: Multi-layer fixing frameworks keep saltwater and contaminants absent from basic raceways. You'll involvement longer benefit interims and decreased downtime in unforgiving marine conditions.
High Minute Capacity: Optimized contact points and raceway geometry give extraordinary resistance to tipping loads. Your crane keeps up steadiness indeed amid off-center lifts or in overwhelming seas.
Precision Turn: P5-grade fabricating resistances guarantee smooth, controlled slewing movement. This interprets to way better stack situating exactness and administrator confidence.
Flexible Mounting: Standardized jolt designs and mounting interfacing rearrange establishment and substitution. You can coordinated our heading into existing crane plans or unused custom configurations.
Extended Benefit Life: Progressed warm treatment makes a solidified surface layer whereas keeping up a extreme, shock-resistant center. This combination diminishes wear and anticipates untimely disappointment beneath affect loads.
Applications
Marine deck cranes depend on our slewing orientation for cargo dealing with operations where unwavering quality straightforwardly influences vessel efficiency. Portable harbor cranes utilize these components for holder exchange in harbour offices. Seaward wind establishment vessels depend on them for exact turbine situating amid establishment campaigns.
Floating cranes and crane vessels benefit from the bearing's ability to handle dynamic loads caused by vessel motion. Ship supply cranes require the corrosion resistance and compact design our products provide. Offshore platform cranes operate continuously in some of the harshest environments, where our Slewing Bearing For Marine Crane delivers consistent performance.
Installation Guide
Start by reviewing the mounting surfaces on both the crane's turning stage and settled base. Surfaces must be level, clean, and free from erosion or harm. Check that jolt gaps adjust legitimately some time recently proceeding.
Position the slewing bearing carefully, guaranteeing legitimate introduction of the equip teeth if your demonstrate incorporates inside or outside equipping. Embed all mounting jolts finger-tight at first, at that point fix in a star design to convey clamping constrain evenly.
Apply indicated torque values utilizing a calibrated torque torque. Perform introductory fixing to 70% of last torque, at that point total fixing to 100% in a moment pass. After establishment, pivot the bearing through a few total transformations to confirm smooth operation some time recently applying loads.
Inject marine-grade lithium complex oil through all grease ports until new oil shows up at the seals. This guarantees total filling of the raceway cavity.




Exhibition
We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc


Partners
Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping
Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).



Maintenance and Care
Lubrication Plan: Apply high-pressure marine oil each 100 working hours or month to month, whichever comes to begin with. Quality oil makes a defensive film that avoids metal-to-metal contact and disperses loads equally over rolling components. In high-intensity operations, you may require more visit intervals.
Bolt Review: Check mounting jolt torque each 500 working hours. Vibration and energetic loads can cause slow releasing. Retighten to determination if any jolts have misplaced pressure. Supplant any jolts appearing signs of misshapening or string damage.
Condition Observing: Assess seals for harm or weakening amid each grease cycle. Tune in for bizarre clamor amid operation, which may demonstrate lacking oil or defilement. Screen turn resistance—sudden increments recommend flotsam and jetsam section or bearing damage.
Check for oil spillage, which demonstrates seal disappointment or overfilling. Look at mounting surfaces for worrying erosion, obvious as reddish-brown powder around jolt gaps. Address any issues quickly to avoid quickened wear.
FAQ
Q: What's the typical lead time for standard marine crane bearings?
A: Standard configurations ship within 4-6 weeks. Custom designs require 8-12 weeks depending on complexity and current production schedule.
Q: Can you provide bearings for replacement in existing cranes?
A: Yes. Our engineering team can reverse-engineer bearings from physical samples or measurements when original drawings aren't available.
Q: How do I select between ball and roller configurations?
A: Ball bearings suit moderate loads with higher speed requirements. Roller bearings handle heavier loads at lower speeds. Our technical team can recommend the optimal configuration based on your crane specifications.
Q: What warranty coverage do you provide?
A: We offer 12-month warranty from commissioning date or 18 months from shipment, whichever comes first, covering manufacturing defects under normal operating conditions.
Q: Do you provide installation support?
A: We supply detailed installation drawings and procedures with every bearing. On-site installation guidance is available for major projects by arrangement.
Contact Us
Ready to improve your Slewing Bearing For Marine Crane performance? Contact our technical team at mia@hgb-bearing.com for application-specific recommendations and quotations.












