Overview of Wire Ropes for Rough-Terrain and Telescopic-Mobile Cranes

This document provides technical specifications and comparisons of wire ropes used in rough-terrain and telescopic-mobile cranes, focusing on different types of IWRC (Independent Wire Rope Core) ropes and Nuflex non-rotating ropes.

Wire Rope Types and Brands

• IWRC 6×WS26 SP (Special Pitch)
• IWRC 6×WS31 SP (Special Pitch)
• IWRC 6×Fi29 SP (Special Pitch)
• Nuflex (Non-Rotating Rope)

The document compares these ropes based on key performance factors such as cost, flexibility, service life, breaking load, and crushing resistance.

Performance Comparison

IWRC ropes generally offer lower cost, better flexibility, and longer service life, whereas Nuflex ropes provide higher breaking load and better crushing resistance.

Standards and Specifications

The ropes conform to the CF standard based on the Japanese Industrial Standard. Two categories are noted:

• CF standard for IWRC 6×WS26 SP, 6×WS31 SP, and 6×Fi29 SP
• CF standard for Nuflex P.S (19) + 39×P.7

Technical Data Summary

The document includes detailed tables listing nominal diameters, weights per meter, and minimum breaking loads (in kN) for each rope type and grade. Key points include:

• Nominal diameters range from 8 mm to 40 mm.
• Weights vary approximately from 0.275 kg/m to 1.43 kg/m depending on diameter and rope type.
• Minimum breaking loads range from approximately 228 kN to 1420 kN, increasing with diameter and rope grade.
• Grades mentioned include Grade T, Grade B, and Grade C, indicating different strength classifications.

This data is critical for selecting the appropriate wire rope based on load requirements and operational conditions.

Summary of Key Parameters

• IWRC 6×WS31 SP and 6×WS26 SP: Offer a balance of flexibility, cost-effectiveness, and service life.
• Nuflex Non-Rotating Rope: Superior in breaking load and crushing resistance but at higher cost and less flexibility.
• Compliance: All ropes meet Japanese Industrial Standards (CF standard).

Recommendations and Best Practices

Selection between IWRC special pitch ropes and Nuflex non-rotating ropes should consider the trade-offs between cost, flexibility, service life, and mechanical strength. For applications requiring higher breaking loads and crushing resistance, Nuflex ropes are preferable. For cost-sensitive applications with a need for flexibility and longer service life, IWRC ropes are recommended.