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Rubber Marine Fender Shock Absorbing Dock Protection Corrosion Resistance
Product Overview
Roller Fenders are engineered marine protection assemblies designed to control vessel contact forces while allowing the contacting vessel to move along the fender surface with reduced sliding resistance. Unlike conventional fixed rubber fender profiles that primarily rely on compression and deformation, a Roller Fender incorporates a rotating cylindrical rubber body supported by a central shaft, bearing or bushing arrangement, steel frame, and structural mounting components.
This operating principle is particularly useful where vessels cannot approach a berth, guide wall, lock entrance, or dock structure along a perfectly perpendicular trajectory. In these conditions, a fixed contact surface can experience substantial friction, localized abrasion, and repeated lateral loading. A rotating roller provides a continuously moving contact interface, helping the vessel travel along the protected structure while distributing the interaction over the length of the rubber body.
Case Study: Heavy-Duty Roller Fender System
A commercial port in the Middle East required an upgraded vessel guidance system along a high-traffic approach structure connecting the outer harbor with an inner cargo handling area. The facility was used by bulk carriers, general cargo vessels, and service vessels, with vessel sizes varying considerably according to the operating schedule.
The original protection arrangement relied on fixed rubber contact elements installed along sections of the guide wall. During vessel approach and alignment, ships could make contact at an angle rather than directly perpendicular to the wall. As the hull moved forward, the fixed rubber surfaces were subjected to sliding contact, generating repeated friction and localized wear.
The replacement system was designed around heavy-duty Roller Fenders with reinforced steel support assemblies. The project engineering team reviewed vessel dimensions, estimated contact locations, operating directions, water level conditions, and the available structural fixing points before establishing the roller arrangement.
Following commissioning, vessels were able to maintain contact with the rollers while continuing their forward movement along the guide wall. Instead of forcing the rubber surface to remain stationary against the moving hull, the rollers rotated with the direction of vessel movement, reducing sliding interaction and distributing repeated contact over the roller circumference.
Technical Specifications
Product Name
Roller Fenders
Material
High Density NR/NBR/SBR
Temperature
from -30°C to 70°C
Specific Gravity
1.45 g/cm³
Intensity
3 MPA
Hardness
65 ± 5 Shore A
Elongation
≥300%
Size
D1080-2900mm
Package
By Pallets, By carton, By Iron Cage
Color
Black, as Required
Certificate
CE, ROHS, REACH, SGS, MSDS, ISO9001
Experience
32 years
Market
North America, Asia, Europe, South America, Australia, Africa
Payment
BANK TRANSFER, 30% T/T, Balance Before Shipment, L/C
Dimensions Table
Model No.
A [mm]
B [mm]
C [mm]
D [mm]
E [mm]
G [mm]
H [mm]
J [mm]
K [mm]
L [mm]
HM-RF1080
1250
1150
610
1080
1150
220
460
800
340
60
HM-RF1450
1530
1400
740
1320
1450
260
510
950
400
75
HM-RF1500
1600
1450
765
1370
1500
270
610
1000
425
75
HM-RF1900
2050
1850
975
1750
1900
350
690
1250
500
125
HM-RF2100
2300
2100
1110
1980
2100
400
765
1400
550
150
HM-RF2700
3000
2700
1425
2550
2700
500
895
1800
700
200
Key Features
Heavy-Duty Structural Load Transfer: Engineered steel frame distributes contact forces into supporting infrastructure with stable load path and proper mounting geometry
Marine Rubber Roller with Repeated-Contact Durability: High-performance rubber formulation provides elasticity, tear resistance, abrasion resistance, and fatigue performance for long service life
Corrosion-Controlled Steel Components: Comprehensive corrosion protection for shafts and support frames ensures dimensional stability and structural integrity in marine environments
Adaptable Installation and System Configuration: Flexible arrangement options including vertical, horizontal, angled, or multi-unit configurations to match specific project requirements
Applications
Port Entrance and Vessel Approach Structures: Provides controlled contact surface for vessel alignment through restricted navigation areas
Dry Docks, Repair Facilities and Transfer Areas: Reduces friction during docking operations and accommodates repeated operational cycles
Heavy-Duty Marine Infrastructure: Integrated protection for quay approaches, guide walls, lock approaches, and specialized marine handling facilities
Why Choose Hongruntong Marine
Integrated Manufacturing: Complete assembly engineering covering rubber rollers, steel components, and mounting systems
Engineering-Based Configuration: Customized product dimensions and structural arrangements according to project requirements
Quality Control and Manufacturing Consistency: Comprehensive inspection procedures throughout production for dimensional accuracy and structural integrity
Project Support and Long-Term Service: Technical coordination, installation planning, and maintenance consideration for complete project lifecycle
Frequently Asked Questions
What determines the correct Roller Fender size for a marine project?
The appropriate size depends on vessel displacement, hull geometry, expected contact height, approach speed, contact direction, operating frequency, and the structural capacity of the supporting installation. Roller diameter and length should provide sufficient contact coverage while remaining compatible with the available mounting space.
Can Roller Fenders be installed on existing quay walls or guide structures?
Yes. Roller Fender assemblies can be engineered for installation on existing marine structures, provided that the supporting structure and fixing points have sufficient capacity. The installation arrangement should be reviewed according to the existing wall dimensions, available anchor positions, contact height, and vessel operating conditions.
How does a Roller Fender reduce friction during vessel contact?
A conventional fixed fender remains stationary while the vessel moves against its surface, creating sliding interaction. A Roller Fender rotates around its central shaft as the vessel moves along the contact surface. This changes the relative movement from predominantly sliding to rolling, which can reduce friction and surface abrasion.
What maintenance is normally required?
Routine inspection should include the rubber roller surface, shaft, bearings or bushings, support frame, fasteners, mounting points, and corrosion protection. Operators should check for abnormal deformation, excessive wear, cracks, corrosion, loose connections, or restricted rotation.
Can Roller Fenders be customized for different installation orientations?
Yes. Roller Fenders can be configured for vertical, horizontal, angled, or multi-unit arrangements depending on the protected structure and vessel movement. Customization may include roller diameter and length, shaft dimensions, frame geometry, mounting position, connection details, and corrosion-protection requirements.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
1988
Total Annual:
7,462,700-11,940,300
Employee Number:
300~500
Ecer Certification:
Verified Supplier
HONGRUNTONG MARINE
Welcome to Hongruntong Marine, your trusted source for professional rubber fender solutions. With expertise in manufacturing high-quality marine fenders, we are committed to providing reliable protection for your vessels during berthing operations. Our dedication to e... HONGRUNTONG MARINE
Welcome to Hongruntong Marine, your trusted source for professional rubber fender solutions. With expertise in manufacturing high-quality marine fenders, we are committed to providing reliable protection for your vessels during berthing operations. Our dedication to e...