China 8x25F-IWRC Highly flexible 8-strand elevator wire rope Manufacturer, Factories

Product Features:

Composition: This steel core wire rope is preformed, smooth-faced, right-handed, and alternately laid. The outer strands are twisted in layers with the core.

Applications: Suitable for high-rise, high-speed elevator traction ropes with speeds < 4 m/s.

Product Description

Elevator Steel Wire Rope Overview

Elevator wire rope is a critical load-bearing component designed to suspend the car and counterweight. It drives the elevator through friction between the traction wheel and the rope, ensuring safe and smooth vertical transportation.

Functional Positioning

  • Load-bearing: Supports the total weight of the car, load, and counterweight.
  • Drive System: Transmits power via traction wheel friction.
  • High Durability: Designed as a wearing part to withstand constant bending and pressure.

Structural Composition

  • Steel Wire: High-strength basic unit.
  • Strands: Usually 6 or 8 strands for optimal flexibility.
  • Rope Core: Fiber cores (sisal/synthetic) for lubrication or steel cores (IWRC) for strength.

Technical Requirements & Classification

Key Performance Indicators:

  • High Tensile Strength
  • Adaptable Flexibility (Softness)
  • Superior Wear Resistance

Common Types:

  • Suspension Rope: 8x19S+SFC or 6x19S+SFC.
  • Governor Rope: Links speed governor to car.
  • Compensation Rope: Balances weight changes.

8x25F-IWRC Technical Datasheet

Nominal Diameter (mm) Approx. Weight (kg/100m) Minimum Breaking Load (kN) - Dual Tensile Single Tensile (1570 MPa)
IWRC CSC 1370/1770 IWRC 1370/1770 CSC 1570/1770 IWRC 1570/1770 CSC IWRC CSC
826.024.635.834.738.036.935.834.7
933.031.245.343.948.246.745.343.9
1040.738.555.954.259.557.655.954.2
1258.655.480.578.085.683.080.578.0
1368.865.194.591.510097.494.591.5
1610498.6143139152147143139

Allowable Tolerance Data

Steel Wire Rope Diameter Tolerance
Zero Load: Max 3% (<10mm) / Max 2% (>10mm) With Load (10% Fmin): Min -1%

Frequently Asked Questions (FAQ)

What is the primary function of an elevator wire rope?
Its primary function is to suspend the elevator car and counterweight, using friction from the traction wheel to drive the vertical movement of the system.
Why are 8-strand ropes often preferred over 6-strand ropes?
Under the same diameter, an 8-strand wire rope offers better flexibility (softness) compared to a 6-strand rope, though it may have slightly lower wear resistance.
What are the different types of rope cores used?
Ropes typically use either Fiber Cores (SFC like sisal or synthetic fiber) to enhance flexibility and store lubrication, or Steel Cores (IWRC/CSC) for higher strength and structural stability.
What are the technical requirements for safety?
The rope must possess high tensile strength to bear full loads, high flexibility to adapt to repeated bending around wheels, and excellent wear resistance against rope grooves.
What is a speed governor wire rope?
It is a specific type of rope used to connect the elevator car to the speed governor, typically utilizing a 6x19S+SFC structure for reliable safety triggering.

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