822mm Large-Diameter Cable Pulley Block | Heavy-Duty Stringing Block for Overhead Line Construction

1. Overview

The 822mm Large-Diameter Cable Pulley Block is designed for guiding and supporting conductors during overhead transmission line stringing operations.
With its extra-large 822mm sheave diameter and reinforced frame, it provides smooth conductor passage, reduced friction, and excellent mechanical stability for medium- and high-voltage power line projects.

Suitable for long-span, mountain, and high-load stringing applications.

2. Product Definition

A cable pulley block is a guiding device used during conductor installation.
This model features:

• A large 822mm sheave for reduced bending stress
• Heavy-duty frame construction
• Compatibility with various conductor types (ACSR, AAAC, ACCC, OPGW)

It is commonly used with pulling machines, tensioners, and pilot rope systems.

3. Key Features

• Extra-Large 822mm Sheave

Provides a wide guiding radius that protects the conductor surface and improves pulling efficiency.

• Heavy-Duty Frame Structure

Built for strength and stability in demanding overhead line environments.

• Smooth Low-Friction Bearings

Ensures consistent rotation, reduces pulling resistance, and supports long-distance stringing work.

• Versatile Conductor Compatibility

Suitable for single or bundled conductors depending on groove customization.

• Optional Custom Configurations

Available options include groove material, hook styles, grounding rollers, and special coatings.

4. Advantages

• Reduced Stress on Conductors

The larger diameter minimizes conductor bending and surface abrasion.

• Built for Harsh Field Conditions

Ideal for mountain terrain, long-span towers, and high-tension applications.

• Long Service Life

Durable materials and sealed bearings provide extended operational use.

• Compatible With All Major Stringing Equipment

Works with hydraulic tensioners, pullers, pilot ropes, swivels, and overhead line accessories.

• Safe and Efficient Stringing

Stable frame geometry ensures reliable conductor guidance under heavy loads.

Applications

Suitable for:

• Conductor installation for 110kV, 220kV, 330kV, 500kV transmission lines

• Single or bundled conductor stringing

• OPGW and ADSS cable guiding

• Long-span and mountain line construction

• Tower-to-tower pulling operations

• Use with pullers, tensioners, and pilot rope systems

Technical Data

FAQ

Q1: Can the sheave be aluminum, nylon, or rubber-lined?
Yes, all three options are available based on project requirements.

Q2: Can the block handle bundled conductors?
Yes, custom groove spacing and widths are available for 2–4 bundled conductors.

Q3: What is the maximum working load?
Standard models range from 40–80 kN, and we can upgrade based on your project needs.

Q4: Is the block compatible with grounding devices?
Grounding rollers and clamp-type grounding kits are optional.

Q5: Do you provide matching stringing equipment?
Yes, we offer tensioners, pullers, pilot ropes, swivels, rollers, and complete stringing tool sets.