Sliding Bearings for Marine And Offshore
We provide custom manufacturing of finished bronze parts and self-lubricating bronze, precisely based on our clients’ drawings.
Sliding Bearings for the Marine/Offshore Industry: Maintenance-Free Solutions for Harsh Environments
The marine and offshore industries face some of the harshest operating conditions on earth—continuous saltwater corrosion, extreme loads, high vibration, and limited maintenance windows. Under these conditions, conventional bearings often fail rapidly, leading to costly downtime and maintenance expenses. Maintenance-free sliding bearings—including self-lubricating spherical bearings, PTFE composite bronze bushings, and aluminum bronze graphite bushings—have become a key solution to address these challenges.
Our Products for Marine/Offshore
PTFE Composite Bronze Bushings
- Structure: Steel backing + sintered porous bronze layer + PTFE sliding layer
- Very low friction coefficient: 0.05–0.18
- Suitable for multiple conditions: dry running, oil lubrication, and water lubrication
- Maximum load capacity: Static load up to 200 N/mm², dynamic load up to 100 N/mm²
Sliding Bearings for Marine & Offshore: High-Performance Self-Lubricating Solutions
self lubricating sliding bearings in marine environment
Marine sliding bearings designed for offshore platforms and ships, ensuring reliable performance under heavy loads and extreme conditions.
High-Performance Sliding Bearings for Marine & Offshore Industry
Durable Marine Sliding Bearings
Premium sliding bearings for marine engineering, built for low friction, high strength, and resistance to saltwater corrosion.
Marine & Offshore Key Applications and Bearing Selection
1. Deck Machinery (Cranes, Winches, and Fairleads)
Deck equipment is constantly exposed to salt spray and heavy weathering.
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Specific Parts: Winch drums, crane pivot points, fairlead rollers, and sheaves.
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Bearing Type: CuAl10NiFe4 Aluminum Bronze Bushing with Graphite Plugs.
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Why this material: CuAl10NiFe4 (equivalent to C95800) offers superior cavitation and corrosion resistance in seawater. The solid graphite plugs provide a continuous lubrication film, eliminating the need for manual greasing in hard-to-reach areas.
2. Steering and Propulsion Systems
Precision and durability are vital for the vessel’s maneuverability.
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Specific Parts: Rudder trunks, tiller linkages, and stabilizer fins.
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Bearing Type: Oilless Spherical Plain Bearings.
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Why this material: These are often constructed with a stainless steel inner ring and a self-lubricating fabric liner (PTFE/Aramid) or a bronze outer race with graphite. They accommodate the multi-directional misalignment common in rudder systems while maintaining low friction under high tidal pressure.
3. Offshore Drilling and Subsea Equipment
Subsea actuators and blowout preventers (BOP) require materials that won’t seize in deep-water conditions.
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Specific Parts: BOP door hinges, riser tensioners, and subsea valves.
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Bearing Type: PTFE Composite Bronze Bushing.
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Why this material: The PTFE Composite Bronze Bushing. structure (Steel or Stainless Steel back + Sintered Bronze powder + PTFE/Lead or PTFE/Fiber layer) is ideal for limited space. In marine versions, a stainless steel or high-tin bronze backing is used to prevent rust, while the PTFE layer ensures smooth operation even after long periods of inactivity.
4. Mooring and Loading Systems
Heavy-duty movement requires bearings that can handle massive static and dynamic loads.
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Specific Parts: Mooring buoy swivels, FPSO turret components, and L-shaped wear plates for sliding gates.
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Bearing Type: Oilless Bronze Bushings (Cast Bronze with Solid Lubricant).
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Why this material: Utilizing materials like CuZn25Al5 (High-tensile Brass) or CuSn12 (Tin Bronze) with embedded solid lubricants, these bearings handle the slow-speed, high-load oscillation of offshore structures without the risk of oil leakage into the ocean.
Technical Comparison for Marine Applications
| Bearing Type | Material Specification | Core Benefit in Marine | Typical Part |
| Graphite Plugged Bushing | CuAl10NiFe4 (C95800) | Excellent seawater corrosion resistance | Rudder systems, Fairleads |
| Spherical Plain Bearing | Stainless Steel / Bronze + PTFE | Accommodates misalignment & oscillation | Hydraulic cylinders, Steering |
| PTFE Composite | SS316 + Bronze + PTFE | Compact, dry-running, low friction | Control valves, Actuators |
| Solid Oilless Bushing | CuZn25Al5 + Graphite | Ultra-high load capacity | Winches, Anchor handlers |
C95500 Nickel Aluminum Bronze Bushing for Marine & Offshore
C95500 nickel aluminum bronze bushings are high-strength sliding bearings designed for harsh marine and offshore environments. They offer excellent resistance to seawater corrosion, wear, and heavy loads, ensuring long service life with minimal maintenance.
Key Features:
- High load capacity and impact resistance
- Superior seawater and corrosion resistance
- Excellent wear and anti-galling performance
- Suitable for low-speed, heavy-duty applications
Typical Applications:
- Ship propulsion systems (rudder & stern tube)
- Offshore platforms and subsea equipment
- Marine pumps, valves, and deck machinery
Available in custom sizes, with options like graphite plugs or oil grooves for enhanced lubrication performance.
Why Choose Oilless Bearings for Offshore?
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Zero Maintenance: Eliminates the labor costs and safety risks of lubricating equipment in hazardous offshore zones.
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Environmental Compliance: No oil or grease discharge into the marine ecosystem.
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Corrosion Resistance: Use of marine-grade alloys (Aluminum Bronze, Tin Bronze) prevents seizure in salt-heavy environments.
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Long Service Life: Engineered to match the overhaul cycles of major ship and platform components.
