20-76 mm Swivel Head Fairlead | Rotating Fairlead for Ship Towing

Product Specification

20-76 mm Swivel Head Fairlead | Rotating Fairlead for Ship Towing

Product Overview

The 20-76 mm swivel head fairlead is a deck-mounted rope-guiding assembly for ship mooring and towing arrangements where the wire-rope lead direction may change during operation. A rotating head and sheave arrangement helps the rope path align with the actual lead angle, reducing avoidable side contact at the sheave and supporting smoother redirection into or away from towing and mooring equipment.

This product is commonly marketed as a 360-degree swivel head fairlead. However, the supplied technical data states a 90-degree sheave movement and a swivel-head range of ±90 degrees. Continuous 360-degree rotation is therefore not stated as confirmed in this page and should be verified against the approved general arrangement drawing. The dimensional range covers wire-rope diameters from 20 to 76 mm; load definition, model-specific breaking-strength values, base connection, deck reinforcement, and inspection scope should be confirmed for each project.

Quick Specifications

• Applicable wire-rope diameter: 20-76 mm → nine listed sizes support preliminary model selection and drawing comparison.
• Declared breaking-strength range: 32-200 MT → source terminology only; it is not presented as SWL, MBL, test load, or permissible load without the model-specific load table.
• Rotation data: sheave 90° + swivel head ±90° → supports changing rope lead angles; continuous 360° head rotation remains to be confirmed.
• Main dimensions: A, B, H, and Φ → used for deck-space checking and GA drawing coordination; the exact definition of Φ requires the project drawing.
• Construction: rotating head, sheave, shaft / pin, support bracket, and mounting base → bearing or bushing arrangement and rotation stops should be specified.
• Material options: C-Mn steel / cast steel, with stainless steel discussed as a project option → exact grades and component construction must be confirmed before quotation.
• Surface treatment: Sa 2.5 blasting + one layer of epoxy shop primer as a reference system → final coating follows the vessel or project painting specification.
• Installation focus: deck-mounted load path → base connection, surrounding clearance, supporting structure, and weld or bolt details require shipyard or design-office confirmation.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm the rope type and nominal diameter. The supplied table is identified by wire-rope diameter; suitability for synthetic rope or anchor chain must be separately confirmed.

Step 2: Confirm the load basis and provide the rope minimum breaking load, expected operating load, safety factor, and towing or mooring duty. Request the model-specific load table because the stated 32-200 MT range is not mapped to individual rope sizes.

Step 3: Confirm the required rope lead envelope. State the horizontal and vertical lead angles and verify whether the project needs ±90° head movement, 90° sheave movement, or true continuous 360° rotation.

Step 4: Confirm the installation interface: deck position, base footprint, weld-down or bolt-down arrangement, deck reinforcement, surrounding clearance, and relationship to the winch, towing hook, or other rope-handling equipment.

Step 5: Confirm material grade, sheave-groove requirement, bearing or bushing type, sealing, lubrication points, coating system, low-temperature requirement, and any stainless-steel or special-steel option.

Step 6: Provide quantity, vessel type, classification society requirement, inspection and certificate scope, GA or installation drawing, destination, and required delivery date.

Structure

Rotating head | Grooved sheave | Shaft / pin assembly | Support bracket | Bearing or bushing arrangement to be confirmed | Deck mounting base | Rotation stop and locking arrangement to be confirmed

Rotation, Rope Guidance & Installation Advantages

• The rotating head can follow changes in rope lead direction, which helps reduce side loading caused by forcing the rope through a fixed sheave alignment.
• A correctly matched sheave groove and smooth rope-contact surface can reduce local chafing and uneven contact; groove profile should be confirmed for the specified wire-rope construction and diameter.
• The swivel and sheave movements should remain free through the approved operating envelope. Rotation stops, adjacent structure, and rope clearance should be checked on the vessel arrangement drawing.
• The sheave shaft, bearing or bushing, seals, and lubrication points are maintenance-critical components. Their exact design and service intervals should be confirmed from the approved supplier drawing and manual.
• Fairlead loads are transferred through the mounting base into the supporting deck structure. Deck reinforcement and weld or bolt details should be verified by the shipyard or vessel design office.
• Material traceability, casting or fabrication inspection, dimensional inspection, NDT, load verification, and class witnessing can be arranged according to the agreed project scope and approval procedure.

Custom Attributes

• Product Type: Swivel head fairlead → multi-direction rope guide for ship mooring and towing arrangements.
• Rope Size Range: 20 / 25 / 32 / 38 / 44 / 52 / 60 / 68 / 76 mm → select according to the supplied wire-rope size table and approved drawing.
• Rotation Arrangement: Sheave 90° + swivel head ±90° according to supplied data → continuous 360° rotation is to be confirmed.
• Load Term: Breaking strength 32-200 MT as supplied → exact definition, safety factor, and size-by-size values are required before engineering selection.
• Material: C-Mn steel / cast steel → exact grade, casting scope, and any fabricated components are to be confirmed.
• Surface Treatment: Sa 2.5 blasting + epoxy shop primer as reference → final coating, DFT, color, and touch-up system follow project specification.
• Installation: Deck mounted → base connection and supporting structure must match the vessel arrangement and approved load path.
• Certificate Requirement: Available according to order scope → maker certificate, material certificate, class certificate, NDT report, and witness inspection should be agreed before quotation.

How It Works

Wire rope approaches the fairlead → The swivel head turns toward the changing rope lead → The sheave rotates as the rope moves → The groove guides the rope while limiting side contact → Reaction loads pass through the shaft, bracket, and mounting base into the reinforced deck structure

Applications

Tugboats | Workboats | Engineering vessels | Ship towing stations | Mooring stations with changing rope lead angles | Newbuilding and replacement projects

Certifications & Advantages

Certificates can be arranged according to project requirement, inspection scope, material traceability, and classification society approval procedure.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

Drawing & Photos

FAQ

Q1: Does this fairlead provide continuous 360-degree swivel rotation?

A1: Not confirmed from the supplied data. The product is marketed as a 360-degree swivel head fairlead, while the stated movement is sheave 90° and swivel head ±90°. The actual continuous rotation, stops, and operating envelope should be confirmed on the approved GA drawing.

Q2: Can the 32-200 MT breaking-strength range be used as the fairlead SWL?

A2: No. The supplied term is breaking strength and no size-by-size mapping or safety factor is provided. It should not be converted into SWL, rope MBL, test load, or permissible load without the manufacturer's calculation, load table, and project approval basis.

Q3: What maintenance information is needed for a swivel head fairlead?

A3: Confirm the sheave groove condition, free rotation, shaft and pin wear, bearing or bushing type, seal condition, lubrication points, grease specification, rotation stops, base welds or bolts, and inspection intervals. These details should be included in the approved manual or project datasheet.

Ordering

MOQ: 1 Unit | Delivery: 30–60 days | Customization available

FAQ

Q1: Why use swivel fairlead?
A: To accommodate changing rope direction and reduce side load.

Q2: How to select size?
A: Based on rope diameter and breaking strength.

Q3: Can it rotate fully?
A: Swivel head allows ±90° rotation depending on design.