Conical Pedestal Roller Fairlead | DIN 81907 Form B, 80–320 kN

Conical Pedestal Roller Fairlead | DIN 81907 Form B, 80–320 kN

Product Overview

The DIN 81907 Form B pedestal roller fairlead is a single vertical roller assembly mounted on a conical deck pedestal. It is used to guide mooring and warping lines at a raised deck level, helping the line change direction without continuous sliding contact against a fixed edge. The rotating roller and smooth rope-contact surface help reduce localized abrasion while keeping the line clear of nearby deck structure.

Form B is the conical-pedestal configuration and is different from the cylindrical Form A arrangement. Based on the supplied parameter table, Form B is available in nominal numbers 8, 12, 20, and 32 with stated SWL values from 80 to 320 kN and several pedestal-height options. Selection should consider the line type and diameter, rope MBL, lead direction, pedestal height, foundation geometry, deck reinforcement, welding details, roller material, bearing or bush arrangement, lubrication, coating system, and required class inspection scope.

Quick Specifications

• Product type: Single-roller pedestal fairlead → guides and redirects a mooring or warping line at a raised deck position.
• Standard and form: DIN 81907:1997-12 Form B → conical pedestal configuration; DIN Media lists this edition as the current pedestal fair lead standard.
• Referenced roller standard: DIN 81906:1999-05 → current DIN reference for the associated warping / pedestal roller series.
• Form B nominal range: 8 / 12 / 20 / 32 → smaller nominal numbers 1 / 2 / 3 / 5 in the supplied table belong to Form A, not this page.
• SWL range: 80 to 320 kN → fitting SWL from the supplied table; it is not the rope MBL and is not a lifting rating.
• Pedestal-height options: 800 to 1400 mm depending on nominal number → allows the roller centerline to match the vessel deck and rope lead arrangement.
• Material options: steel pedestal with roller material according to order → exact cast steel, nodular iron, stainless steel, axle, bush, and bearing materials require confirmation.
• Surface treatment: Sa 2.5 blasting + one epoxy shop-primer coat as reference → final coating, galvanizing, or polished stainless finish follows the approved project specification.

Main Technical Parameters

Main Form B selection dimensions for the DIN 81907 conical pedestal roller fairlead. Dimensions are in mm unless otherwise stated. Symbols d4, d5, and f follow the supplied parameter table and should be checked against the approved drawing before production.

Selection & Inquiry Guide

Step 1: Confirm DIN 81907 Form B and select nominal number 8, 12, 20, or 32 according to the required fitting SWL and vessel mooring arrangement.

Step 2: Confirm pedestal height h and the required line centerline elevation so the roller aligns with the incoming and outgoing rope path.

Step 3: Provide rope type, rope diameter, rope MBL, expected lead angles, and intended mooring / warping duty; towing use must be separately confirmed by the approved vessel arrangement.

Step 4: Confirm roller, pedestal, axle, bush or bearing, lubrication, and material requirements, including stainless or low-temperature material where applicable.

Step 5: Confirm foundation dimensions, deck reinforcement, welding detail, load direction, coating system, inspection method, and classification society requirement.

Step 6: Provide quantity, delivery destination, required delivery time, vessel type, installation drawing, and reference photos if available.

Structure

DIN 81906 vertical roller | Roller axle and bush / bearing arrangement | Conical Form B pedestal | Welded deck foundation interface | Smooth rope-contact surface | Lubrication and maintenance points | Shop primer or specified surface treatment

Roller, Foundation & Engineering Advantages

• The conical Form B pedestal provides a widened lower support area for elevated roller positions and is selected when the vessel arrangement requires a tapered pedestal rather than the cylindrical Form A structure.
• The raised vertical roller changes the horizontal lead of the line while helping keep the rope away from deck edges, bulwark structure, and nearby fittings.
• A freely rotating roller reduces sliding friction at the contact surface; axle alignment, bush or bearing fit, lubrication, and maintenance access should be controlled during production and service.
• Multiple pedestal-height combinations allow the roller centerline to be coordinated with the actual deck layout, but the height must be selected together with line angles and the surrounding mooring arrangement.
• The pedestal base transfers the fairlead reaction into the ship structure; the deck foundation, reinforcement, weld detail, and allowable load direction should be reviewed by the shipyard or design office.
• FEA review, load testing, NDT, material traceability, and class witnessing can be arranged when specified in the project inspection plan and agreed order scope.

Custom Attributes

• Standard: DIN 81907:1997-12 → current DIN edition for pedestal fair leads.
• Form: Form B conical pedestal → distinct from the cylindrical Form A configuration.
• Nominal Number: 8 / 12 / 20 / 32 → Form B range identified in the supplied dimension table.
• SWL: 80 / 120 / 200 / 320 kN → fitting rating used for selection; do not substitute rope MBL or lifting capacity.
• Roller Standard: DIN 81906:1999-05 → exact roller size and material should be confirmed by nominal number and approved drawing.
• Installation: Deck welded foundation → pedestal seating, deck reinforcement, weld preparation, and load direction require drawing review.
• Material: To be confirmed by component → pedestal, roller, axle, bush / bearing, and low-temperature requirements may use different material specifications.
• Surface Treatment: Sa 2.5 blasting + epoxy shop primer as reference → final coating, galvanizing, or stainless finishing follows project requirements.
• Certificate Requirement: Available according to order scope → class certificate, maker certificate, material certificate, NDT, or witness testing must be agreed before quotation.

How It Works

Mooring or warping line approaches the pedestal fairlead → Line contacts the vertical roller → Roller rotates and redirects the line at the required deck elevation → Reaction is transferred through the conical pedestal to the reinforced deck foundation → Roller, axle, lubrication, welds, and coating are inspected during service

Applications

Sea-going vessels | Inland vessels | Tugboats | Workboats | Cargo vessels | Mooring and warping stations | Raised deck line-routing positions | Newbuilding and replacement projects | Approved towing-line guidance positions when specified by vessel design

Certifications & Advantages

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

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

Drawing & Photos

FAQ

Q1: What is the difference between DIN 81907 Form A and Form B?

A1: Form A uses a cylindrical pedestal and covers the broader nominal range shown in the supplied table. Form B uses a conical pedestal and, for this page, is limited to nominal numbers 8, 12, 20, and 32 with higher pedestal-height combinations.

Q2: Can the 80 to 320 kN SWL values be used as rope MBL or lifting capacity?

A2: No. The values are fitting SWL figures from the supplied DIN 81907 table. Rope MBL, operating load, lead angle, safety factors, deck foundation, and project approval must be checked separately. The fairlead is not a lifting product.

Q3: What information is required before quotation?

A3: Confirm Form B nominal number, SWL, pedestal height, rope type and diameter, rope MBL, line direction, vessel type, material for each component, bush or bearing requirement, lubrication, surface treatment, deck foundation drawing, certificate scope, quantity, destination, and required delivery time.

                                                                             Drawing of DIN 81907 Form B Casting Roller Pedestal Fairlead ShipTowing Equipment