Screw Type Anchor Chain Releaser | Watertight Cable Clench for Ship Deck and Bulkhead Installation (CB 289-81)

Product Overview

The CB 289-81 screw type anchor chain releaser, also referred to as a cable clench or anchor cable releaser, is used to secure the end link of an anchor chain and allow controlled release when required. It can be arranged on the ship deck, on a bulkhead, or at the anchor chain locker boundary according to the vessel design, installation space, watertight requirement, and operating arrangement.

This screw-operated cable clench covers nominal chain diameter ranges from 25 mm to 122 mm based on the supplied parameter table, and is stated for Grade 2 and Grade 3 anchor chains. For shipyards, repair yards, vessel owners, and engineering buyers, the main confirmation points are chain size, anchor chain grade, mounting position, watertight function test, operating clearance, material, surface protection, certificate scope, and whether the project drawing calls for CB 289-81 or another confirmed revision.

Quick Specifications

• Product type: Screw type anchor chain releaser / cable clench → secures the anchor chain end link and supports controlled release according to vessel procedure.
• Technical standard: CB 289-81 as supplied → exact standard revision should be confirmed if the project document also refers to CB* 289-91.
• Nominal chain diameter range: 25 mm to 122 mm → covers several anchor chain sizes for small vessels, tugboats, workboats, inland vessels, and other ship types when the vessel drawing matches.
• Applicable chain grade: Grade 2 and Grade 3 anchor chains → chain grade and end-link dimensions should be checked before selection.
• Installation position: ship deck, bulkhead, or anchor chain locker boundary → mounting structure, operating clearance, and watertight boundary should be confirmed by drawing.
• Operation: screw-operated mechanical arrangement → designed for practical rotary operation and reliable release / securing action when correctly installed and maintained.
• Watertight requirement: watertight function test is specified → test method, pressure, duration, and acceptance criteria should follow project or class requirement.
• Material and finish: C-Mn steel or stainless steel, with Sa 2.5 blasting + epoxy shop primer, galvanizing, or customized surface treatment available according to order.

Main Technical Parameters

Main webpage selection dimensions for CB 289-81 screw type anchor chain releaser. Dimensions are in mm unless otherwise stated. The complete supplied dimension table is kept in the Engineering Reference section.

Selection & Inquiry Guide

Step 1: Confirm the product name and standard reference: screw type anchor chain releaser / cable clench, CB 289-81 or the exact project-specified revision.

Step 2: Confirm nominal anchor chain diameter range, chain grade, and end-link / bitter-end arrangement according to the vessel anchor chain specification.

Step 3: Confirm installation position: deck, bulkhead, or chain locker boundary, including available space, operating direction, opening position, and watertight boundary.

Step 4: Confirm material requirement: C-Mn steel, stainless steel, or other specified steel grade, together with any material certificate requirement.

Step 5: Confirm surface treatment and corrosion protection: Sa 2.5 blasting + epoxy shop primer, galvanized finish, final paint system, or customized surface treatment.

Step 6: Confirm inspection and certificate scope before quotation: watertight function test, maker certificate, material certificate, class inspection, or witness inspection if required.

Step 7: Provide quantity, vessel type, installation drawing or reference photo, delivery destination, required delivery time, and any classification society requirement.

Structure

Screw-operated body | Anchor chain end-link clenching interface | Manual / remote operating connection according to vessel layout | Deck or bulkhead mounting interface | Watertight sealing arrangement | Inspection and coating surface | Optional stainless steel execution

Design, Installation & Quality Advantages

• The screw-operated structure supports gradual mechanical securing and release of the anchor chain end link, which is useful where a simple, robust, and serviceable arrangement is required.
• The installation can be arranged on deck or bulkhead positions when supported by the vessel drawing; mounting details, reinforcement, and watertight boundary should be checked by the shipyard or design office.
• The supplied size range from 25 mm to 122 mm chain diameter allows the cable clench to be selected for different vessel sizes, including small boats, tugboats, workboats, service vessels, and inland vessels when the chain specification matches.
• Watertight function testing is listed in the supplied specification, making the sealing design and installation interface important purchasing and inspection points.
• C-Mn steel and stainless steel options allow the buyer to match corrosion environment, maintenance expectation, vessel paint system, and project budget.
• Rotating and screw contact areas should be checked for smooth operation after fabrication, surface treatment, and final assembly to avoid excessive operating effort.
• Surface treatment can be arranged as Sa 2.5 blasting with epoxy shop primer, galvanizing, or customized coating according to project coating specification.

Custom Attributes

• Standard: CB 289-81 as supplied → use this reference when the shipyard or owner specification calls for this screw type anchor releaser.
• Product name: Screw type anchor chain releaser / cable clench → used for securing and releasing the anchor chain end link, not for lifting service.
• Nominal chain diameter: 25–122 mm → select by actual anchor chain diameter and project drawing.
• Anchor chain grade: Grade 2 / Grade 3 → chain grade and end-link dimensions should be confirmed before manufacturing.
• Installation: deck / bulkhead / chain locker boundary → installation interface and watertight area should follow vessel arrangement drawing.
• Operation: screw-operated mechanical release → operating handle, rod, or remote operation layout should be confirmed according to the vessel design.
• Watertight function: test required according to supplied specification → test method and acceptance criteria to be confirmed by project requirement.
• Material: C-Mn steel or stainless steel → exact grade and certificate scope should be confirmed before order.
• Surface treatment: Sa 2.5 blasting + epoxy shop primer, galvanized, or customized → final finish follows project corrosion protection requirement.
• Certificate requirement: available according to project requirement → class approval, witness inspection, and certificate level should be confirmed before quotation.

How It Works

Anchor chain end link is fixed by the cable clench → Screw mechanism keeps the link secured during normal service → Operator turns the screw / control arrangement from the designated position when release is required → The end link is released according to vessel procedure → Watertight function is checked according to project test requirement

Applications

Small vessels | Tugboats | Workboats | Service boats | Patrol boats | Government vessels | Inland vessels | Anchor chain lockers | Deck anchor chain end securing positions | Bulkhead anchor chain end securing positions | Newbuilding and repair projects

Certifications & Advantages

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

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

Drawing & Photos

FAQ

Q1: How should the correct CB 289-81 screw type anchor chain releaser be selected?

A1: Select the model by nominal anchor chain diameter, chain grade, end-link arrangement, installation position, operating clearance, and the vessel drawing. The supplied table covers chain diameter ranges from 25 mm to 122 mm.

Q2: Can this cable clench be installed on both deck and bulkhead positions?

A2: It can be arranged on deck or bulkhead positions when the vessel design supports the mounting interface and watertight boundary. The shipyard or design office should confirm reinforcement, opening location, operation direction, and inspection requirement.

Q3: Are class certificates supplied automatically with every order?

A3: No. Class-related certificates, witness inspection, material traceability, and watertight test documentation should be confirmed before quotation and arranged according to project requirement and class approval procedure.