1. Overview

The Aluminum–Nylon Stringing Pulley Blocks are specially designed for overhead transmission line construction, ideal for double and triple bundled conductors (300–900mm²). With a working load range of 40–105kN, these pulley blocks ensure smooth conductor handling, reduced friction, and high reliability during stringing operations.

They are widely used in 110kV–500kV line projects, providing stable guiding and protection for conductors and OPGW during installation.

2. Definition

A Stringing Pulley Block is a wheel-based guiding device used during conductor installation to reduce friction and prevent conductor damage.
This model features:

• Aluminum alloy frame for strength

• High-density nylon sheaves for low friction

• Compatible with two- or three-bundled conductors

3. Key Features

Durable Aluminum Alloy Frame

Provides excellent strength-to-weight ratio, corrosion resistance, and long service life.

Nylon Sheave with Smooth Rotation

• Low friction coefficient

• Prevents scratching or deformation of conductors

• Ideal for ACCC / ACSR / AAAC lines

40–105kN Working Load

Suitable for medium and heavy-duty line stringing operations.

Support 2–3 Bundled Conductors

Stable guiding for double or triple conductor arrangements.

High-Quality Bearings

Ensures smooth rotation and reduces pulling resistance, improving construction efficiency.

Optional: Grounding Device / Lining Protection

Customizable depending on project requirements.

4. Advantages

High Strength & Lightweight

Aluminum alloy housing provides rigidity while reducing overall weight.

Reduced Conductor Wear

Nylon groove protects the surface of conductors and OPGW.

Lower Friction, Higher Efficiency

Professional bearing design reduces pulling force requirements.

Compatible with Most Transmission Line Projects

Applicable for 300–900mm² conductors and 40–105kN hydraulic tensioners.

Reliable for Long-Distance Stringing

Stable structure ensures consistent performance under continuous load.

6. Applications

1. Overhead transmission line stringing (110kV–500kV)
2. ACSR / AAAC / ACCC conductor installation
3. Double or triple bundle conductor guiding
4. OPGW & ADSS fiber optic cable stringing
5. Tower-to-tower conductor pulling operations

Three sheaves Helicopter Stringing Blocks

FAQ

Q1: Can the pulley blocks be customized?

Yes, we offer custom sizes, groove types, grounding rollers, and connection fittings.

Q2: Are nylon wheels suitable for heavy conductors?

Yes. Engineering-grade nylon provides excellent wear resistance and minimizes conductor damage.

Q3: What conductor types are compatible?

ACSR, AAAC, ACCC, OPGW, and similar overhead conductors.

Q4: How long is the service life?

Typically 8–15 years, depending on usage frequency and environmental conditions.

Q5: Do you provide matching tools (tensioner, puller, rollers)?

Yes. We offer a full set of stringing equipment for turnkey solutions.