Changshu Xinya Machinery Manufacturing Co., Ltd.
Changshu Xinya Machinery Manufacturing Co., Ltd. Professional Overhead Line Stringing Tools Manufacturer,Undergroud Cable Pulling Tools Supplier.
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660mm Triple-Sheave Nylon Stringing Block for Pilot Wire Rope | Overhead Line Stringing Tool
1. Overview
The 660mm 3 Sheave Nylon Stringing Block is specially designed for pilot wire rope guiding during overhead transmission line construction.
Its three-sheave design and high-strength nylon wheels ensure smooth rope running, reduced friction, and excellent protection during conductor or pilot rope stringing.
Ideal for 110kV–500kV line projects, this block is widely used for rope traction from tower to tower before pulling conductors.
2. Product Definition
A Stringing Block is a wheel-type guiding tool used for pulling pilot wire rope or conductors along power transmission lines.
This model features:
660mm outer diameter nylon sheaves
Three-groove design for stable rope guiding
Suitable for steel pilot rope / PP rope / synthetic pulling rope
3. Key Features
Triple-Sheave Design for Stable Guiding
Three grooves help the pilot rope pass smoothly without jumping or twisting.
High-Density Nylon Sheaves
Low friction
Wear-resistant
Gentle on the rope surface
Reinforced Aluminum Alloy Frame
Lightweight yet high-strength structure ensures safety in heavy-duty field use.
Smooth, Low-Resistance Bearings
Improves pulling efficiency and reduces load on tensioners and pullers.
Wide Rope Compatibility
Ideal for steel pilot wire rope, PP rope, composite rope, and traction lines.
4. Advantages
Reduced Wear on Pilot Rope
Nylon grooves prevent friction burn and minimize rope deformation.
High Working Load for Mountain or Long-Span Lines
Designed for tough environments and continuous operation.
Lightweight for Easy Tower Mounting
Technicians can lift and install quickly on various tower structures.
Versatile for Pilot Rope & Conductor Stringing
Applicable to both pilot rope guiding and small conductor pulling.
Customizable Options
Groove diameter, frame type, hook connection, and grounding roller can be customized.
6. Applications
Used in:
Pilot rope stringing for 110kV / 220kV / 330kV / 500kV transmission lines
Tower-to-tower rope pulling operations
Conductor and OPGW preliminary guiding
Long-distance and mountain terrain line construction
Use with hydraulic pullers and tensioners
Technical Data
| Product No. | Model Type | Rated Load(KN) | Applicable Conductor ACSR(mm2) | Weight(kg) | Sheave No. | Outside Dia*Groove Dia* Sheave Width(mm) |
| 80317 | SHDN-660*100 | 20 | ≤500 | 20 | 1 | Φ660*Φ560*100 |
| 80320 | SHSQN-660*100 | 40 | 85 | 3 | ||
| 80321 | SHWQN-660*100 | 60 | 110 | 5 |
FAQ
Q1: Can the sheave material be changed to aluminum?
Yes. We provide aluminum sheaves, MC nylon, or rubber-lined grooves upon request.
Q2: What rope diameter is compatible?
We can customize the groove to match 8–18mm pilot rope or your project specifications.
Q3: Can the working load be upgraded?
Yes, working load can be adjusted from 20kN to 60kN depending on frame design.
Q4: Do you supply matching pullers and tensioners?
Yes. We can supply full sets of stringing equipment for turnkey projects.
Q5: What is the typical lifespan?
Normal working conditions allow 8–12 years of service life.