4-Roller Universal Fairlead for Ship Mooring | JIS F 2026-1980 Type A

4-Roller Universal Fairlead for Ship Mooring | JIS F 2026-1980 Type A

Product Overview

The JIS F 2026-1980 Type A fairlead is a four-roller horizontal roller fairlead used as a rope guide in ship mooring arrangements. Its four-roller configuration combines vertical and horizontal rollers around the rope opening so that a mooring line can change lead direction without rubbing directly against fixed deck edges. The product is normally selected together with the vessel mooring arrangement, applicable wire-rope diameter, installation position and supporting deck structure.

Under JIS F 2026-1980, Type A is the four-roller form; the same standard also includes Type BR and Type BL configurations with different roller arrangements. For Type A, nominal sizes 140 to 315 are associated with applicable wire-rope diameters from 18 to 42.5 mm. The standard also specifies material schedules, visual quality and smooth roller operation. Load rating, deck reinforcement, coating system and certificate scope should be confirmed separately against the project specification and approved vessel drawing.

Quick Specifications

• Product type: 4-roller universal fairlead / fairlead with horizontal rollers → used to guide mooring lines through changes in horizontal and vertical lead direction.

• Standard and type: JIS F 2026-1980 Type A → four-roller configuration defined by the Japanese standard.

• Nominal size: 140 / 160 / 180 / 200 / 250 / 315 → use the standard designation for selection; do not describe this range as the roller diameter.

• Applicable wire-rope diameter: 18 to 42.5 mm → reference range for initial size selection; final rope compatibility should follow the vessel mooring plan.

• Roller arrangement: 2 vertical + 2 horizontal rollers → provides four-sided rope-contact guidance around the opening.

• Reference calculated mass: 187 to 1232 kg → reference mass for Type A; final manufactured and shipping mass should be confirmed from the approved production drawing.

• Standard material basis: structural steel frame, steel / steel-tube / cast-steel roller components, carbon-steel roller pins and bronze bushes → legacy JIS grades and any modern equivalents should be confirmed for the project.

• Inspection basis: visual condition and smooth manual roller rotation → both are explicit quality checks in JIS F 2026-1980.

Main Technical Parameters

Main webpage selection data for JIS F 2026-1980 Type A. Dimensions are in mm unless otherwise stated. Nominal size is the standard product designation; it should not be presented as the roller diameter.

Selection & Inquiry Guide

Step 1: Confirm JIS F 2026-1980 Type A and the required nominal size from the vessel mooring arrangement or replacement drawing.

Step 2: Confirm applicable rope type and diameter. For the standard Type A range, the reference wire-rope diameter is 18 to 42.5 mm; rope construction and actual lead geometry should also be checked.

Step 3: Confirm the project load basis separately. Provide required SWL or design load, rope MBL where relevant, load direction, safety-factor basis and any classification-society comments. Do not treat rope MBL or reference rope size as the fairlead SWL.

Step 4: Confirm installation geometry, foundation / weld interface, deck thickness, local reinforcement, clearances for roller rotation and maintenance access. Final supporting structure remains part of the vessel structural design.

Step 5: Confirm material schedule, acceptable modern equivalents to legacy JIS grades, roller pin and bush requirements, lubrication arrangement, surface preparation and coating system.

Step 6: Provide quantity, vessel type, installation position, classification-society requirement, inspection scope, approved drawing or reference photo, delivery destination and required delivery time.

Structure

Welded Steel Frame | Two Vertical Rollers | Two Horizontal Rollers | Roller Pins | Bronze Bushes | Grease Lubrication Points | Rope Opening | Deck Installation Interface

Design / Engineering / Quality Advantages

• Four-sided roller guidance → vertical and horizontal rollers guide the line around the opening and reduce direct sliding contact with fixed steel edges.

• Standardized dimensional series → six nominal sizes allow the fairlead to be matched to vessel arrangement drawings and applicable wire-rope diameter.

• Defined pin-and-bush arrangement → the JIS material schedule identifies carbon-steel roller pins and bronze bushes, supporting a maintainable rotating interface.

• Smooth roller operation as a quality requirement → the standard requires rotating parts to operate smoothly during manual inspection.

• Controlled visual quality → the finished fairlead should be free from cracks and other defects harmful to service, with satisfactory finishing.

• Installation engineering remains vessel-specific → rope lead, deck reinforcement, weld details and load transfer should be verified with the shipyard or naval architect rather than inferred from nominal size alone.

Custom Attributes

• Standard: JIS F 2026-1980 → Japanese standard for fairleads with horizontal rollers.

• Type: Type A → four-roller configuration; Type BR and Type BL are separate configurations under the same standard.

• Nominal Size: 140 / 160 / 180 / 200 / 250 / 315 → standard designation used for product selection.

• Applicable Wire Rope: 18 / 22.4 / 25 / 28 / 35.5 / 42.5 mm → reference values associated with the six nominal sizes.

• Reference Calculated Mass: 187 / 277 / 387 / 510 / 900 / 1232 kg → reference only; final manufactured mass should be confirmed from the approved drawing.

• Standard Material Basis: JIS legacy material schedule → frame, rollers, pins and bushes use different specified material groups; equivalent modern grades require confirmation.

• Bush / Lubrication Arrangement: Bronze bush with grease-lubrication provisions → maintain accessibility for inspection and lubrication.

• SWL / Design Load: To be confirmed → no product SWL should be inferred from applicable rope diameter or nominal size.

• Surface Protection: According to project specification → blasting, marine coating, galvanizing or other systems are project-specific supply options, not automatic JIS requirements.

• Certification: According to project requirement → class involvement, material traceability and witness scope are subject to the purchase order and approval procedure.

How It Works

Mooring Line Approaches the Fairlead → Line Contacts the Relevant Vertical / Horizontal Roller → Roller Rotates to Reduce Sliding Contact → Line Direction Changes Through the Opening → Resulting Loads Transfer Through the Fairlead Frame to the Supporting Deck Structure

Applications

Ship Mooring Stations | Bow / Stern Rope Lead Positions | Deck-Edge Rope Guidance | Winch-to-Fairlead Rope Routing | Newbuilding Projects | Replacement of Existing JIS F 2026 Type A Fairleads | Project-Specified Towing Rope Guidance

Certifications & Advantages

Inspection and certification scope should be confirmed before quotation. Material certificates, maker inspection records, dimensional inspection, roller-operation checks and classification-society attendance can be arranged according to project requirement and order scope.

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

Drawing & Photos

FAQ

Q1: What does Type A mean in JIS F 2026-1980?

A1: Type A is the four-roller configuration under JIS F 2026-1980. The standard also includes Type BR and Type BL arrangements. The correct type should therefore be taken from the vessel drawing rather than selected by roller count alone.

Q2: Does the 140–315 range mean roller diameter?

A2: No. It is the JIS nominal-size designation. For Type A, the six nominal sizes correspond to applicable wire-rope diameters from 18 to 42.5 mm and to different frame, opening and roller dimensions.

Q3: Can SWL be determined from this dimensional table?

A3: No. The dimensional table and applicable rope diameter should not be converted directly into product SWL. Required SWL or design load, rope MBL, lead direction, deck reinforcement and class requirements should be confirmed from the project design basis.