Transmission Line Running Blocks

Designed specifically for installing large diameter electrical transmission conductor, these units are available in sheave diameters to suit all needs - 22", 28", 36" and 42" - with models suitable for full-tension stringing or helicopter stringing.

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At Slingco we have gained a global reputation for innovation in design and engineering among our many customers in the energy sector, and this is exemplified in our range of transmission line running blocks.

Designed specifically for installing large diameter electrical transmission conductor, these units are available in sheave diameters to suit all needs - 22", 28", 36" and 42" - with models suitable for full-tension stringing or helicopter stringing. Each block is designed to deliver maximum performance in terms of safety, strength, usability and longevity.

Slingco blocks are gravity die cast from high specification aluminium, providing the cast components with the perfect blend of strength, durability and value for money.

The sheaves are lined with a high performance polyurethane coating. This provides a resilient but supportive surface that minimizes wear on the conductor. It also maintains peripheral support to minimize conductor distortion under tension loads and, in doing so, maximise the working life of the running blocks.

Running block sheaves feature high quality low-friction bearings to minimize rolling resistance and alleviate any potential deformation of the electrical conductor.

All cast component parts benefit from high-tolerance CNC machining and, where appropriate, heat-treatment, providing class leading strength and durability.

Helicopter version
This model, designed for stringing use in conjunction with helicopters, incorporates a spring-loaded gate at the side of the frame, facilitating one-way passage of the conductor into its operational position on the sheave.

7" Universal Running Block
The model is a lightweight but exceptionally rugged, reliable, and durable distribution running block. Used in conjunction with purpose-designed accessories, it has proven extremely popular with utility operators and their contractors for the exceptional versatility it offers in terms of installation applications and locations. Its low-friction bearings render high block efficiency, which helps to maximize stringing distances while minimizing pulling tensions and reducing loads on stringing equipment.

Like the larger models in our range, the 7" block is gravity die cast from high specification aluminium to deliver the optimum combination of strength and durability.

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