Open Type Marine Mooring Guide Roller | NS 2585 Cast Steel Single Roller Fairlead

Product Overview

The NS 2585 open type marine mooring guide roller is a single roller fairlead component used to guide mooring ropes and adjust rope direction at ship mooring stations. It is normally selected according to roller diameter, applicable rope type, vessel mooring arrangement, rope lead angle, and the fairlead support or mounting structure shown on the project drawing.

This page focuses on the NS 2585 roller range from 150 mm to 450 mm roller diameter. The roller provides a smooth rope-contact surface for synthetic fiber rope, Malina rope, and steel wire rope applications listed in the supplied parameter table. The maximum applicable rope diameter is a selection reference only and should not be treated as product SWL, MBL, rope breaking load, or test load.

Quick Specifications

• Product type: open type single mooring guide roller → used as a fairlead / warping roller component for ship mooring rope direction control.
• Standard reference: NS 2585 → used when the vessel drawing or purchase specification calls for NS 2585 roller dimensions.
• Roller diameter range: 150–450 mm → covers small to medium ship mooring guide roller arrangements in the supplied table.
• Applicable rope types: synthetic fiber rope, Malina rope, and 1550 N/mm² steel wire rope → select the roller by rope type and maximum applicable rope diameter.
• Roller weight range: 24.8–310 kg → useful for handling planning, packing, transport estimate, and installation preparation.
• Material options: mild steel, C-Mn steel, stainless steel, cast steel, or nodular cast iron → final grade and manufacturing form should be confirmed before quotation.
• Surface treatment: Sa 2.5 blasting + one layer epoxy shop primer, galvanized, polished, or customized finish → final system should follow vessel coating specification.
• Supply scope: standard roller or customized arrangement → shaft, stand, pedestal, bearing / bushing detail, and installation interface should be confirmed by drawing when required.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm the required standard and product type: NS 2585 open type single mooring guide roller.

Step 2: Confirm roller diameter D from 150 to 450 mm according to vessel drawing, rope type, and maximum applicable rope diameter.

Step 3: Confirm rope information: synthetic fiber rope, Malina rope, or steel wire rope; for steel wire rope, confirm construction such as 6×24 or 6×37 and strength grade if specified.

Step 4: Confirm supply scope: roller only, roller with shaft, roller with stand / pedestal, or complete fairlead assembly if required.

Step 5: Confirm material, surface treatment, certificate scope, inspection requirement, and whether customized dimensions are required.

Step 6: Provide quantity, application vessel type, installation position, drawing or reference photo, delivery destination, and required delivery time.

Structure

Cast / steel roller body | Open type single roller arrangement | Smooth rope-contact surface | Central bore / shaft interface | Fairlead support interface to be confirmed | Shop primer, galvanized, polished, or specified surface treatment

Roller Surface, Selection & Engineering Advantages

• The single roller arrangement is suitable where the mooring rope needs a defined turning point or rope direction change in a fairlead arrangement.
• The smooth rope-contact surface helps reduce sharp local abrasion compared with fixed steel edges, especially when the rope lead angle changes during mooring operation.
• The 150–450 mm roller diameter range allows selection by rope type and rope diameter rather than using one oversized roller for all rope conditions.
• Separate tables for synthetic fiber rope, Malina rope, and steel wire rope help avoid mixing rope diameter selection with product load rating.
• The supplied material options allow the roller to be matched with project corrosion, wear, and class inspection requirements; final material grade should be confirmed before production.
• Surface treatment can be selected for shipyard practice, including shop primer for later coating, galvanized finish, polished stainless steel surface, or project-specific coating system.
• For replacement projects, the existing roller diameter, bore / shaft dimension, support arrangement, and available installation space should be checked before quotation.

Custom Attributes

• Standard: NS 2585 → use when the shipyard, owner, or vessel drawing specifies NS 2585 fairlead / warping roller dimensions.
• Type: Open type single roller → suitable for fairlead arrangements where rope direction is controlled by one exposed roller.
• Roller Diameter: 150 / 200 / 250 / 300 / 350 / 400 / 450 mm → select according to rope diameter, vessel layout, and project drawing.
• Applicable Rope: synthetic fiber, Malina, and steel wire rope → maximum rope diameter depends on rope type and steel wire rope construction.
• Material: mild steel, C-Mn steel, stainless steel, cast steel, or nodular cast iron → final material grade, casting requirement, or fabrication method to be confirmed.
• Surface Treatment: Sa 2.5 blasting + one layer epoxy shop primer, galvanized, polished, or customized → final finish follows vessel painting and corrosion-protection requirement.
• Supply Scope: roller only / roller with shaft / roller with stand / complete fairlead assembly → to be confirmed before quotation.
• Certificate Requirement: available according to project requirement → class inspection, material traceability, and maker certificate scope should be confirmed before order.

How It Works

Mooring rope approaches the guide point → Rope contacts the smooth rotating roller → Roller changes the rope lead direction and reduces sliding abrasion → Local force is transferred through the shaft / support arrangement to the fairlead foundation → Final selection is checked with rope type, lead angle, and vessel mooring layout

Applications

Ship mooring stations | Fairlead assemblies | Warping roller positions | Deck rope guide arrangements | Bulwark rope guide arrangements | Cargo vessels | Tugboats | Workboats | Newbuilding and replacement projects

Certifications & Advantages

Certificates can be arranged according to project requirement, inspection scope, material traceability, 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 NS 2585 roller diameter be selected?

A1: Select the roller diameter according to the vessel drawing, rope type, maximum applicable rope diameter, rope lead direction, and available fairlead support arrangement. The 150–450 mm table provides the main selection reference for quotation and webpage drawing.

Q2: Can the maximum applicable rope diameter be used as product SWL or MBL?

A2: No. The supplied table gives maximum applicable rope diameters for different rope types. It should not be converted directly into product SWL, MBL, breaking load, reference load, or test load without project design basis and class approval.

Q3: What information is needed before quotation?

A3: Confirm NS 2585, roller diameter, rope type and diameter, material grade, surface treatment, supply scope, certificate requirement, quantity, installation drawing or reference photo, delivery destination, and required delivery time.