Triple-Sheave Bundled Conductor Stringing Block | Three-Wheel Pulley for Transmission Line Construction

1. Overview

The Triple-Sheave Bundled Conductor Stringing Block is designed for guiding and supporting bundled conductors during overhead transmission line construction.
Equipped with three large-diameter sheaves, the block ensures smooth conductor passage, reduced friction, and stable performance in medium- to high-voltage stringing operations.

It is ideal for double or triple bundled ACSR, AAAC, and ACCC conductors.

2. Product Definition

A stringing block is a rotating sheave device used to guide conductors during installation.
This model features:

• Three independent sheaves

• A reinforced frame

• Compatibility with various bundles and conductor sizes

Commonly used with hydraulic pullers, tensioners, and pilot rope systems in transmission line projects.

3. Key Features

• Triple-Sheave Configuration

Supports double- or triple-bundled conductors and ensures stable guiding through each phase of the stringing process.

• Heavy-Duty Frame Structure

Designed for long-span, high-tension, and demanding field environments.

• Low-Friction Bearings

Provides smooth rotation, reduces pulling force, and improves construction efficiency.

• Multiple Sheave Material Options

Aluminum, nylon, or rubber-lined grooves to match conductor protection requirements.

• Customizable Groove Size

Groove diameter, width, and spacing can be tailored to fit conductor bundle specifications.

4. Advantages

• Protects Conductor Surface

Reduced friction and optimized groove shape minimize scratches and bending stress.

• Reliable for High-Voltage Line Projects

Commonly used in 110kV, 220kV, 330kV, and 500kV transmission lines.

• Suitable for Bundled Conductor Configurations

Efficient for 2-bundle and 3-bundle configurations depending on project design.

• Long Service Life

Sealed bearings and durable frame ensure consistent performance in field conditions.

• Highly Compatible

Works with standard line construction equipment and accessories.

Specification:

Single Wheel-Wheel material aluminum or Nylon, and it could be covered by rubber.

Three Wheels-The pulleys are suitable for string two or three bundled conductor lines.

Five Wheels-The pulleys are suitable for string four bundled conductor lines.

6. Applications

Suitable for:

• Bundled conductor stringing for overhead transmission lines

• Double or triple bundle ACSR / AAAC / ACCC installations

• Tower-to-tower conductor guiding

• Long-span, mountain, or high-tension projects

• Use with pilot rope, pullers, tensioners, and swivels

7. FAQ

Q1: Can the sheaves be customized for different conductor sizes?
Yes, groove width, diameter, and spacing can be customized.

Q2: What conductor types are supported?
ACSR, AAAC, ACCC, and OPGW (upon request).

Q3: Is grounding protection available?
Yes, grounding rollers and anti-vibration accessories are optional.

Q4: What is the typical working load?
Standard models range from 30 to 80 kN.
Higher-capacity versions can be provided.

Q5: Do you offer complete stringing equipment?
Yes, full sets including tensioners, pullers, pilot ropes, rollers, and swivels.

Changshu Xinya Machinery Manufacturing Co., Ltd.is located in the beautiful and rich Chinese historical and cultural city - Changshu, Jiangsu. It is on the east of Shanghai, on the southern edge of Suzhou, west of Wuxi, north of the Yangtze River.It is convenient for transportation.

Changshu Xinya Machinery Manufacturing Co., Ltd. is founded in the eighties of last century, specializing in the production of various electrical equipment, forklift mast and so on. And in 2010,we passed through the ISO9001: 2000 and BV certification.

With support of customers, our products  have sold all over the word. According to the needs of the majority of users, we will increase the investment in science and technology,constantly develop new products, strengthen and improve product performance to meet the requirements of our customers.

Our main products are 1 ton, 2 tons, 3 tons, 5 tons, 8 tons JJM series cable pulling winch, hydraulic tensioner,hydraulic puller,cable laying euiqpments,high pressure hydraulic pump with hydraulic crimping tools,come along clamp,stringing pulley, cable roller and cable drum trailer, steel bar, aluminum alloy gin pole , And other power construction equipment and a variety of large tonnage forklift mast and a variety of special requirements of non-standard gantry.

Manufacturing process is complete, strong technical force, processing capacity is complete, finished products are strictly standardized technical quality testing, a sound quality control and after-sales service system, formed a certain scale of power equipment production capacity. Our existing variety of equipment are more than 80 sets, processing capacity, more sophisticated equipment (processing centers and CNC equipment 15 sets) to ensure product quality.