Deck-Mounted Ship Towing Bracket with Sliding Pin | JIS F 2029 Emergency Towing Fitting

Deck-Mounted Ship Towing Bracket with Sliding Pin | JIS F 2029 Emergency Towing Fitting

Product Overview

The JIS F 2029 deck-mounted ship towing bracket is a welded connection fitting used to secure the end link of a chafing chain in an emergency towing arrangement. Its main structure consists of two parallel vertical eye plates on a base plate, a transverse sliding pin passing through the chain end link, a pin support plate, and a stopper pin for retention.

The supplied JIS F 2029-1997 range covers nominal numbers 52 to 132 for applicable anchor-chain diameters from 50 to 132 mm. The bracket is normally arranged on the forecastle deck or another approved towing strong-point location according to the vessel design. It is not a general mooring bollard or rope-guiding chock. Final selection must consider chain grade and end-link geometry, approved towing load, line of pull, pin and plate materials, deck reinforcement, welding details, access for pin handling, and classification requirements.

Quick Specifications

• Product type: Deck-mounted ship towing bracket → secures the chafing-chain end link within an approved emergency towing arrangement.
• Structure: Parallel eye plates + transverse sliding pin + pin support plate + stopper pin → provides a positive chain-end connection with a removable main pin.
• Standard reference: JIS F 2029-1997 → project-adopted edition and official standard status should be confirmed before final datasheet release.
• Nominal range: No. 52 to No. 132 → corresponds to applicable anchor-chain diameters from 50–52 mm up to 124–132 mm.
• Calculated mass: 55 to 723 kg → supports handling, transport, installation planning, and preliminary freight estimation.
• Installation: Welded base plate on reinforced deck structure → bracket load path, weld details, and local deck reinforcement require vessel-design approval.
• Material options: C-Mn steel or mild steel as supplied information → exact plate, pin, support-plate, and stopper-pin grades must be confirmed separately.
• Load basis: No SWL or towing design load is provided in the supplied table → chain diameter is a dimensional selection reference, not a substitute for approved towing-load verification.

Main Technical Parameters

Main selection dimensions from the supplied JIS F 2029 data are listed below. Dimensions are in mm. Dimension symbols must be read together with the official standard drawing or approved GA drawing.

Note: Final model approval should verify the actual chafing-chain end link, pin clearance, towing design load, load direction, deck foundation, and weld arrangement. The nominal chain-diameter range does not declare the bracket SWL.

Selection & Inquiry Guide

Step 1: Confirm JIS F 2029, nominal number 52–132, applicable chain diameter, chain grade, and the actual end-link dimensions.

Step 2: Confirm the bracket function within the vessel emergency towing arrangement, installation position, towing direction, line-of-pull angle, and available working access.

Step 3: Provide the approved towing design load, chain MBL or project load basis, required safety factors, and any test-load requirement; do not derive SWL from nominal number alone.

Step 4: Confirm base-plate, eye-plate, pin, support-plate, and stopper-pin materials, including low-temperature or special-service requirements where applicable.

Step 5: Confirm deck reinforcement, foundation drawing, weld preparation, weld-leg dimensions f / f1, WPS requirement, inspection scope, and access for sliding-pin removal and retention.

Step 6: Confirm surface treatment, final vessel coating system, corrosion protection around the removable pin, material traceability, class society, and certificate scope.

Step 7: Provide quantity, official standard drawing or GA drawing, installation photos if available, delivery destination, required delivery time, and packing or transport limitations.

Structure

Welded base plate | Two parallel vertical eye plates | Transverse sliding main pin | Pin support plate | Stopper pin | Chain end-link engagement space | Deck welding interface | Specified corrosion-protection system

Towing Connection, Welding & Engineering Advantages

• The transverse sliding pin forms a direct mechanical connection through the chafing-chain end link, avoiding the incorrect use of a rope-guiding fitting as the towing connection point.
• Parallel eye plates support the pin on both sides of the chain link; plate spacing, hole alignment, and pin fit should be controlled to prevent installation interference and uneven local bearing.
• The pin support plate and stopper pin provide handling and retention functions, but the final retention arrangement and removal direction must remain accessible in the installed deck layout.
• The welded base plate transfers towing reactions into the vessel structure. Deck plating, under-deck stiffening, brackets, weld length, and load direction must be verified by the ship designer or classification society.
• The standard size range provides dimensional compatibility for several anchor-chain diameters, while final suitability still depends on chain grade, end-link form, project towing load, and approved emergency towing arrangement.
• Pin surface condition, edge radii, hole finish, and corrosion protection should be controlled so that the chain link can be connected and disconnected without damage or avoidable seizure.
• Material traceability, dimensional inspection, welding control, and project-specific examination can be arranged according to the agreed inspection and certification scope.

Custom Attributes

• Standard: JIS F 2029-1997 → use when the vessel or shipyard specification adopts the JIS towing-bracket dimensional series.
• Nominal Number: 52 / 56 / 60 / 64 / 68 / 73 / 78 / 84 / 90 / 95 / 102 / 111 / 120 / 132 → select initially by the applicable chain-diameter range.
• Applicable Chain Diameter: 50–132 mm overall range → actual chain grade and end-link geometry must also be confirmed.
• Connection Method: Sliding transverse pin through the chain end link → pin diameter and fit follow the selected nominal number and approved drawing.
• Installation: Deck welded → local deck reinforcement, weld details, and towing-load direction require project approval.
• Material: C-Mn steel / mild steel as supplied information → individual component grades and pin properties are to be confirmed.
• Surface Treatment: Sa 2.5 blasting + epoxy shop primer as reference → final coating follows the vessel painting specification.
• Certificate Requirement: Available according to project scope → material certificates, maker documentation, class inspection, and test witnessing must be confirmed before quotation.

How It Works

Chafing-chain end link is positioned between the parallel eye plates → Sliding pin passes through the eye plates and chain link → Stopper pin retains the main pin → Towing force transfers from the chain through the pin and eye plates → Welded base and reinforced deck structure carry the reaction into the vessel

Applications

Emergency towing arrangements | Forecastle deck towing stations | Tankers and cargo vessels where the approved arrangement specifies this bracket | Newbuilding projects | Replacement and retrofit projects subject to drawing confirmation

Certifications & Advantages

Certificates and inspection documentation can be arranged according to project requirement, material traceability, approved drawing, inspection scope, and classification-society procedure. Class approval and witness testing are not included by default unless stated in the order.

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

Drawing & Photos

FAQ

Q1: Is the JIS F 2029 bracket a mooring bollard or rope guide?

A1: No. It is a towing connection fitting for securing the end link of a chafing chain with a transverse pin. It should not be described as a bollard, chock, fairlead, or general rope-guiding component.

Q2: Can the bracket be selected only by anchor-chain diameter?

A2: Chain diameter is the initial dimensional reference. Final selection must also confirm chain grade, end-link dimensions, towing design load, line of pull, pin and plate materials, deck reinforcement, weld details, and class approval requirements.

Q3: What information is required before quotation?

A3: Confirm JIS F 2029 nominal number, chain specification and end-link drawing, towing load basis, installation position, load direction, material grades, deck foundation, welding and inspection requirements, coating system, certificate scope, quantity, destination, and delivery schedule.

Main Technical Parameters:

Drawing of JIS F 2029 Towing Mooring Brackets Ship Towing Equipment