7 Inch 178mm 20kN Single Sheave Universal Stringing Blocks with
Low-Friction Cable Roller
Designed for overhead conductor guiding, cable pulling, and
transmission line installation work. This versatile overhead pulley
is suitable for power line construction, telecom cable
installation, utility maintenance, and general cable stringing
projects where stable cable guidance is required.
Common Installation Challenges
- Cable surface damage during pulling operations
- High friction between cable and support points
- Unstable cable direction during overhead installation
- Low working efficiency in narrow or complex job sites
- Difficulty using one roller for different cable pulling angles
Technical Solution
This universal cable roller and stringing block addresses
installation challenges through:
- 178mm sheave diameter for smoother cable guidance
- 20kN rated load for reliable field operation
- Single sheave compact design for easy handling and quick
positioning
- Low-friction rotating pulley to reduce cable wear
- Universal overhead pulley structure for different cable pulling
directions
- Heavy-duty frame construction for transmission line installation
work
Product Specifications
| Parameter | Details | Engineering Significance |
|---|
| Product Name | 7 Inch Universal Cable Roller & Stringing Block | Compact cable guiding tool for field installation |
| Core Keywords | Stringing Blocks / Cable Pulling Blocks | Helps improve product search relevance |
| Sheave Diameter | 7 inch / 178 mm | Provides smoother cable movement and reduces bending pressure |
| Rated Load | 20 kN | Suitable for regular cable pulling and power line installation work |
| Number of Sheaves | 1 Sheave | Easy to carry, install, and reposition on site |
| Structure Type | Single Sheave Overhead Pulley | Suitable for cable guiding and overhead conductor stringing |
| Roller Feature | Low-Friction Rotating Cable Roller | Reduces pulling resistance and cable surface wear |
| Application | Transmission Line Installation / Cable Pulling / Power Line
Installation | Used for power construction, utility maintenance, and overhead line
work |
| Function | Cable guiding, conductor stringing, cable pulling support | Keeps cable movement stable during installation |
| Customization | Available | Sheave size, load capacity, and structure can be customized
according to project requirements |
Operation Principle
The cable or conductor passes over the rotating sheave during
pulling or stringing work. As the pulley rotates, it guides the
cable forward and reduces direct friction between the cable and the
support point. The smooth roller surface helps protect the cable
jacket or conductor surface, while the strong frame keeps the
pulling direction stable. This improves safety, reduces cable
damage, and makes overhead line installation more efficient.
Applications
- Transmission line installation
- Power line construction
- Overhead conductor stringing
- Cable pulling projects
- Utility maintenance work
- Telecom and electrical cable installation
- Temporary cable guiding on job sites
Selection Guidelines
- Light and medium cable pulling: Choose 7 inch single sheave cable pulling blocks for compact and
flexible operation
- Overhead line work: Choose universal stringing blocks with stable frame construction
and smooth roller rotation
- Cable surface protection: Choose low-friction rollers to reduce abrasion during pulling
- Different job site conditions: Choose universal overhead pulley design for easier positioning and
wider application
- Heavier pulling tension: Confirm the actual pulling force and select a rated load that is
higher than the maximum working tension
Frequently Asked Questions
Q1: What is this 7 inch stringing block used for?
A: It is used to guide cables, conductors, or ropes during cable
pulling and overhead power line installation.
Q2: What is the advantage of the 178mm sheave diameter?
A: The 178mm sheave provides smoother cable movement and helps
reduce bending pressure during pulling.
Q3: Is this product suitable for transmission line installation?
A: Yes. It is suitable for transmission line construction, power
line installation, and general cable pulling work.
Q4: Can the rated load be customized?
A: Yes. Rated load and structure can be adjusted according to
project requirements.
Q5: Why choose a universal cable roller?
A: A universal design allows the roller to be used in different
pulling directions and job site conditions, improving flexibility
and efficiency.
