Conductor Cable Stringing Pulley Block For Power Transmission Distribution Lines
A Single Sheave Stringing Block is a pulley block with one sheave (wheel) used primarily for stringing overhead conductors, earth wires, or optical cables in power transmission and distribution lines. It facilitates the smooth guiding and pulling of cables, reducing friction and preventing damage during installation.
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A Single Sheave Stringing Block is a pulley block with one sheave (wheel) used primarily for stringing overhead conductors, earth wires, or optical cables in power transmission and distribution lines. It facilitates the smooth guiding and pulling of cables, reducing friction and preventing damage during installation.
| Feature | Details |
|---|---|
| High-strength nylon (often lined with neoprene for conductor protection), aluminum alloy, or steel. | |
| Common sizes include 120 mm, 160 mm, 250 mm, 508 mm, 660 mm, 750 mm, 822 mm, 916 mm, and larger. | |
| Typically ranges from 5 kN (for small blocks) up to 50 kN or more for large sheaves (e.g., 50 kN for SHDN916). | |
| Varies with size and material; e.g., from 1.5 kg (small nylon blocks) up to 60 kg for large blocks. | |
| Usually galvanized steel for corrosion resistance and durability. | |
| Mounted on ball bearings for smooth rotation and reduced wear. | |
| Suitable for stringing stranded aluminum conductors, ACSR cables, earth wires, OPGW, and bundled cables on tangent or dead-end structures. | |
| Options include hook, clevis, or round eye fittings; swivel connectors and compression sleeves can pass through the groove. |
| Model | Sheave Diameter × Width (mm) | Rated Load (kN) | Weight (kg) | Suitable Conductor Size (mm²) | Notes |
|---|---|---|---|---|---|
| SHDN-120x30 | 120 × 30 | 5 | 1.5 | 25–70 | Nylon sheave |
| SHDN-250x60 | 250 × 60 | 20 | 3.9 | 150–180 | Nylon sheave |
| SHDN508 | 508 (diameter) | 20 | 16 | 300–400 | Nylon, optional neoprene lining |
| SHDN660 | 660 × 100 | 20 | 24 | 400–500 | Nylon, neoprene lining possible |
| SHDN916 | 916 × 110 | 50 | 51 | 700–800 | Large nylon sheave, neoprene lined |
Single sheave stringing blocks are vital tools in overhead line construction, enabling safe and efficient conductor installation by minimizing cable wear and friction. Their robust construction with nylon or aluminum sheaves, ball bearings, and galvanized steel frames ensures durability and smooth operation under various load conditions. Custom fittings and neoprene linings are often available to suit specific cable types and installation needs.
For industrial or marine applications, stainless steel single sheave blocks with secure latch mechanisms and swivel heads are also available, offering high strength and corrosion resistance.
If you need a specific model or technical data, manufacturers provide detailed catalogs with options tailored for different conductor sizes and load requirements.
